diff --git a/x-pack/plugins/apm/index.js b/x-pack/plugins/apm/index.js
index c6844f30f62c..5337aa581727 100644
--- a/x-pack/plugins/apm/index.js
+++ b/x-pack/plugins/apm/index.js
@@ -6,6 +6,7 @@
 
 import { resolve } from 'path';
 import { initTransactionsApi } from './server/routes/transactions';
+import { initTransactionGroupsApi } from './server/routes/transaction_groups';
 import { initServicesApi } from './server/routes/services';
 import { initErrorsApi } from './server/routes/errors';
 import { initStatusApi } from './server/routes/status_check';
@@ -64,6 +65,7 @@ export function apm(kibana) {
 
     init(server) {
       initTransactionsApi(server);
+      initTransactionGroupsApi(server);
       initTracesApi(server);
       initServicesApi(server);
       initErrorsApi(server);
diff --git a/x-pack/plugins/apm/public/components/app/ServiceOverview/__test__/ServiceOverview.test.js b/x-pack/plugins/apm/public/components/app/ServiceOverview/__test__/ServiceOverview.test.js
index 2f93eb0b2f1f..2a6d3f8e5fd2 100644
--- a/x-pack/plugins/apm/public/components/app/ServiceOverview/__test__/ServiceOverview.test.js
+++ b/x-pack/plugins/apm/public/components/app/ServiceOverview/__test__/ServiceOverview.test.js
@@ -8,9 +8,8 @@ import React from 'react';
 import { shallow } from 'enzyme';
 import { ServiceOverview } from '../view';
 import { STATUS } from '../../../../constants';
-import * as apmRestServices from '../../../../services/rest/apm';
-
-jest.mock('../../../../services/rest/apm');
+import * as apmRestServices from '../../../../services/rest/apm/status_check';
+jest.mock('../../../../services/rest/apm/status_check');
 
 describe('Service Overview -> View', () => {
   let mockAgentStatus;
@@ -22,7 +21,6 @@ describe('Service Overview -> View', () => {
       dataFound: true
     };
 
-    // eslint-disable-next-line import/namespace
     apmRestServices.loadAgentStatus = jest.fn(() =>
       Promise.resolve(mockAgentStatus)
     );
diff --git a/x-pack/plugins/apm/public/components/app/ServiceOverview/view.tsx b/x-pack/plugins/apm/public/components/app/ServiceOverview/view.tsx
index 2bd9373b94c3..46be1e85b880 100644
--- a/x-pack/plugins/apm/public/components/app/ServiceOverview/view.tsx
+++ b/x-pack/plugins/apm/public/components/app/ServiceOverview/view.tsx
@@ -9,7 +9,7 @@ import React, { Component } from 'react';
 import { RRRRenderResponse } from 'react-redux-request';
 import { IUrlParams } from 'x-pack/plugins/apm/public/store/urlParams';
 import { IServiceListItem } from 'x-pack/plugins/apm/server/lib/services/get_services';
-import { loadAgentStatus } from '../../../services/rest/apm';
+import { loadAgentStatus } from '../../../services/rest/apm/status_check';
 import { ServiceListRequest } from '../../../store/reactReduxRequest/serviceList';
 import { EmptyMessage } from '../../shared/EmptyMessage';
 import { SetupInstructionsLink } from '../../shared/SetupInstructionsLink';
diff --git a/x-pack/plugins/apm/public/services/rest/apm.ts b/x-pack/plugins/apm/public/services/rest/apm.ts
deleted file mode 100644
index cddd07bf4603..000000000000
--- a/x-pack/plugins/apm/public/services/rest/apm.ts
+++ /dev/null
@@ -1,314 +0,0 @@
-/*
- * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
- * or more contributor license agreements. Licensed under the Elastic License;
- * you may not use this file except in compliance with the Elastic License.
- */
-
-// @ts-ignore
-import { camelizeKeys } from 'humps';
-import { ServiceAPIResponse } from 'x-pack/plugins/apm/server/lib/services/get_service';
-import { ServiceListAPIResponse } from 'x-pack/plugins/apm/server/lib/services/get_services';
-import { TraceListAPIResponse } from 'x-pack/plugins/apm/server/lib/traces/get_top_traces';
-import { TraceAPIResponse } from 'x-pack/plugins/apm/server/lib/traces/get_trace';
-import { TimeSeriesAPIResponse } from 'x-pack/plugins/apm/server/lib/transactions/charts';
-import { ITransactionDistributionAPIResponse } from 'x-pack/plugins/apm/server/lib/transactions/distribution';
-import { TransactionListAPIResponse } from 'x-pack/plugins/apm/server/lib/transactions/get_top_transactions';
-import { TransactionAPIResponse } from 'x-pack/plugins/apm/server/lib/transactions/get_transaction';
-import { SpanListAPIResponse } from 'x-pack/plugins/apm/server/lib/transactions/spans/get_spans';
-import { Span } from 'x-pack/plugins/apm/typings/Span';
-import { Transaction } from 'x-pack/plugins/apm/typings/Transaction';
-import { IUrlParams } from '../../store/urlParams';
-// @ts-ignore
-import { convertKueryToEsQuery } from '../kuery';
-import { callApi } from './callApi';
-// @ts-ignore
-import { getAPMIndexPattern } from './savedObjects';
-
-export async function loadLicense() {
-  return callApi({
-    pathname: `/api/xpack/v1/info`
-  });
-}
-
-export async function loadServerStatus() {
-  return callApi({
-    pathname: `/api/apm/status/server`
-  });
-}
-
-export async function loadAgentStatus() {
-  return callApi<{ dataFound: boolean }>({
-    pathname: `/api/apm/status/agent`
-  });
-}
-
-export async function getEncodedEsQuery(kuery?: string) {
-  if (!kuery) {
-    return;
-  }
-
-  const indexPattern = await getAPMIndexPattern();
-
-  if (!indexPattern) {
-    return;
-  }
-
-  const esFilterQuery = convertKueryToEsQuery(kuery, indexPattern);
-  return encodeURIComponent(JSON.stringify(esFilterQuery));
-}
-
-export async function loadServiceList({ start, end, kuery }: IUrlParams) {
-  return callApi<ServiceListAPIResponse>({
-    pathname: `/api/apm/services`,
-    query: {
-      start,
-      end,
-      esFilterQuery: await getEncodedEsQuery(kuery)
-    }
-  });
-}
-
-export async function loadServiceDetails({
-  serviceName,
-  start,
-  end,
-  kuery
-}: IUrlParams) {
-  return callApi<ServiceAPIResponse>({
-    pathname: `/api/apm/services/${serviceName}`,
-    query: {
-      start,
-      end,
-      esFilterQuery: await getEncodedEsQuery(kuery)
-    }
-  });
-}
-
-export async function loadTraceList({ start, end, kuery }: IUrlParams) {
-  const groups = await callApi<TraceListAPIResponse>({
-    pathname: '/api/apm/traces',
-    query: {
-      start,
-      end,
-      esFilterQuery: await getEncodedEsQuery(kuery)
-    }
-  });
-
-  return groups.map(group => {
-    group.sample = addVersion(group.sample);
-    return group;
-  });
-}
-
-export async function loadTransactionList({
-  serviceName,
-  start,
-  end,
-  kuery,
-  transactionType
-}: IUrlParams) {
-  const groups = await callApi<TransactionListAPIResponse>({
-    pathname: `/api/apm/services/${serviceName}/transactions`,
-    query: {
-      start,
-      end,
-      esFilterQuery: await getEncodedEsQuery(kuery),
-      transaction_type: transactionType
-    }
-  });
-
-  return groups.map(group => {
-    group.sample = addVersion(group.sample);
-    return group;
-  });
-}
-
-export async function loadTransactionDistribution({
-  serviceName,
-  start,
-  end,
-  transactionName,
-  transactionId,
-  kuery
-}: IUrlParams) {
-  return callApi<ITransactionDistributionAPIResponse>({
-    pathname: `/api/apm/services/${serviceName}/transactions/distribution`,
-    query: {
-      start,
-      end,
-      transaction_name: transactionName,
-      transaction_id: transactionId,
-      esFilterQuery: await getEncodedEsQuery(kuery)
-    }
-  });
-}
-
-function addVersion<T extends Span | Transaction | null | undefined>(
-  item: T
-): T {
-  if (item != null) {
-    item.version = item.hasOwnProperty('trace') ? 'v2' : 'v1';
-  }
-
-  return item;
-}
-
-function addSpanId(hit: Span, i: number) {
-  if (!hit.span.id) {
-    hit.span.id = i;
-  }
-  return hit;
-}
-
-export async function loadSpans({
-  serviceName,
-  start,
-  end,
-  transactionId
-}: IUrlParams) {
-  const hits = await callApi<SpanListAPIResponse>({
-    pathname: `/api/apm/services/${serviceName}/transactions/${transactionId}/spans`,
-    query: {
-      start,
-      end
-    }
-  });
-
-  return hits.map(addVersion).map(addSpanId);
-}
-
-export async function loadTrace({ traceId, start, end }: IUrlParams) {
-  const hits = await callApi<TraceAPIResponse>(
-    {
-      pathname: `/api/apm/traces/${traceId}`,
-      query: {
-        start,
-        end
-      }
-    },
-    {
-      camelcase: false
-    }
-  );
-
-  return hits.map(addVersion);
-}
-
-export async function loadTransaction({
-  serviceName,
-  start,
-  end,
-  transactionId,
-  traceId,
-  kuery
-}: IUrlParams) {
-  const result = await callApi<TransactionAPIResponse>(
-    {
-      pathname: `/api/apm/services/${serviceName}/transactions/${transactionId}`,
-      query: {
-        traceId,
-        start,
-        end,
-        esFilterQuery: await getEncodedEsQuery(kuery)
-      }
-    },
-    {
-      camelcase: false
-    }
-  );
-
-  return addVersion(result);
-}
-
-export async function loadCharts({
-  serviceName,
-  start,
-  end,
-  kuery,
-  transactionType,
-  transactionName
-}: IUrlParams) {
-  return callApi<TimeSeriesAPIResponse>({
-    pathname: `/api/apm/services/${serviceName}/transactions/charts`,
-    query: {
-      start,
-      end,
-      esFilterQuery: await getEncodedEsQuery(kuery),
-      transaction_type: transactionType,
-      transaction_name: transactionName
-    }
-  });
-}
-
-interface ErrorGroupListParams extends IUrlParams {
-  size: number;
-  sortField: string;
-  sortDirection: string;
-}
-
-export async function loadErrorGroupList({
-  serviceName,
-  start,
-  end,
-  kuery,
-  size,
-  sortField,
-  sortDirection
-}: ErrorGroupListParams) {
-  return callApi({
-    pathname: `/api/apm/services/${serviceName}/errors`,
-    query: {
-      start,
-      end,
-      size,
-      sortField,
-      sortDirection,
-      esFilterQuery: await getEncodedEsQuery(kuery)
-    }
-  });
-}
-
-export async function loadErrorGroupDetails({
-  serviceName,
-  start,
-  end,
-  kuery,
-  errorGroupId
-}: IUrlParams) {
-  // TODO: add types when error section is converted to ts
-  const res = await callApi<any>(
-    {
-      pathname: `/api/apm/services/${serviceName}/errors/${errorGroupId}`,
-      query: {
-        start,
-        end,
-        esFilterQuery: await getEncodedEsQuery(kuery)
-      }
-    },
-    {
-      camelcase: false
-    }
-  );
-  const camelizedRes: any = camelizeKeys(res);
-  if (res.error.context) {
-    camelizedRes.error.context = res.error.context;
-  }
-  return camelizedRes;
-}
-
-export async function loadErrorDistribution({
-  serviceName,
-  start,
-  end,
-  kuery,
-  errorGroupId
-}: IUrlParams) {
-  return callApi({
-    pathname: `/api/apm/services/${serviceName}/errors/${errorGroupId}/distribution`,
-    query: {
-      start,
-      end,
-      esFilterQuery: await getEncodedEsQuery(kuery)
-    }
-  });
-}
diff --git a/x-pack/plugins/apm/public/services/rest/apm/apm.ts b/x-pack/plugins/apm/public/services/rest/apm/apm.ts
new file mode 100644
index 000000000000..b43c8e73df19
--- /dev/null
+++ b/x-pack/plugins/apm/public/services/rest/apm/apm.ts
@@ -0,0 +1,36 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+import { Span } from 'x-pack/plugins/apm/typings/Span';
+import { Transaction } from 'x-pack/plugins/apm/typings/Transaction';
+// @ts-ignore
+import { convertKueryToEsQuery } from '../../kuery';
+// @ts-ignore
+import { getAPMIndexPattern } from '../savedObjects';
+
+export async function getEncodedEsQuery(kuery?: string) {
+  if (!kuery) {
+    return;
+  }
+
+  const indexPattern = await getAPMIndexPattern();
+  if (!indexPattern) {
+    return;
+  }
+
+  const esFilterQuery = convertKueryToEsQuery(kuery, indexPattern);
+  return encodeURIComponent(JSON.stringify(esFilterQuery));
+}
+
+export function addVersion<T extends Span | Transaction | null | undefined>(
+  item: T
+): T {
+  if (item != null) {
+    item.version = item.hasOwnProperty('trace') ? 'v2' : 'v1';
+  }
+
+  return item;
+}
diff --git a/x-pack/plugins/apm/public/services/rest/apm/error_groups.ts b/x-pack/plugins/apm/public/services/rest/apm/error_groups.ts
new file mode 100644
index 000000000000..7043f83129c0
--- /dev/null
+++ b/x-pack/plugins/apm/public/services/rest/apm/error_groups.ts
@@ -0,0 +1,83 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+import { camelizeKeys } from 'humps';
+import { IUrlParams } from '../../../store/urlParams';
+import { callApi } from '../callApi';
+import { getEncodedEsQuery } from './apm';
+
+interface ErrorGroupListParams extends IUrlParams {
+  size: number;
+  sortField: string;
+  sortDirection: string;
+}
+
+export async function loadErrorGroupList({
+  serviceName,
+  start,
+  end,
+  kuery,
+  size,
+  sortField,
+  sortDirection
+}: ErrorGroupListParams) {
+  return callApi({
+    pathname: `/api/apm/services/${serviceName}/errors`,
+    query: {
+      start,
+      end,
+      size,
+      sortField,
+      sortDirection,
+      esFilterQuery: await getEncodedEsQuery(kuery)
+    }
+  });
+}
+
+export async function loadErrorGroupDetails({
+  serviceName,
+  start,
+  end,
+  kuery,
+  errorGroupId
+}: IUrlParams) {
+  // TODO: add types when error section is converted to ts
+  const res = await callApi<any>(
+    {
+      pathname: `/api/apm/services/${serviceName}/errors/${errorGroupId}`,
+      query: {
+        start,
+        end,
+        esFilterQuery: await getEncodedEsQuery(kuery)
+      }
+    },
+    {
+      camelcase: false
+    }
+  );
+  const camelizedRes: any = camelizeKeys(res);
+  if (res.error.context) {
+    camelizedRes.error.context = res.error.context;
+  }
+  return camelizedRes;
+}
+
+export async function loadErrorDistribution({
+  serviceName,
+  start,
+  end,
+  kuery,
+  errorGroupId
+}: IUrlParams) {
+  return callApi({
+    pathname: `/api/apm/services/${serviceName}/errors/${errorGroupId}/distribution`,
+    query: {
+      start,
+      end,
+      esFilterQuery: await getEncodedEsQuery(kuery)
+    }
+  });
+}
diff --git a/x-pack/plugins/apm/public/services/rest/apm/services.ts b/x-pack/plugins/apm/public/services/rest/apm/services.ts
new file mode 100644
index 000000000000..430d2fa21770
--- /dev/null
+++ b/x-pack/plugins/apm/public/services/rest/apm/services.ts
@@ -0,0 +1,38 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+import { ServiceAPIResponse } from 'x-pack/plugins/apm/server/lib/services/get_service';
+import { ServiceListAPIResponse } from 'x-pack/plugins/apm/server/lib/services/get_services';
+import { IUrlParams } from '../../../store/urlParams';
+import { callApi } from '../callApi';
+import { getEncodedEsQuery } from './apm';
+
+export async function loadServiceList({ start, end, kuery }: IUrlParams) {
+  return callApi<ServiceListAPIResponse>({
+    pathname: `/api/apm/services`,
+    query: {
+      start,
+      end,
+      esFilterQuery: await getEncodedEsQuery(kuery)
+    }
+  });
+}
+
+export async function loadServiceDetails({
+  serviceName,
+  start,
+  end,
+  kuery
+}: IUrlParams) {
+  return callApi<ServiceAPIResponse>({
+    pathname: `/api/apm/services/${serviceName}`,
+    query: {
+      start,
+      end,
+      esFilterQuery: await getEncodedEsQuery(kuery)
+    }
+  });
+}
diff --git a/x-pack/plugins/apm/public/services/rest/apm/status_check.ts b/x-pack/plugins/apm/public/services/rest/apm/status_check.ts
new file mode 100644
index 000000000000..30fe628d8e7f
--- /dev/null
+++ b/x-pack/plugins/apm/public/services/rest/apm/status_check.ts
@@ -0,0 +1,19 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+import { callApi } from '../callApi';
+
+export async function loadServerStatus() {
+  return callApi({
+    pathname: `/api/apm/status/server`
+  });
+}
+
+export async function loadAgentStatus() {
+  return callApi<{ dataFound: boolean }>({
+    pathname: `/api/apm/status/agent`
+  });
+}
diff --git a/x-pack/plugins/apm/public/services/rest/apm/traces.ts b/x-pack/plugins/apm/public/services/rest/apm/traces.ts
new file mode 100644
index 000000000000..87b00a2aab1e
--- /dev/null
+++ b/x-pack/plugins/apm/public/services/rest/apm/traces.ts
@@ -0,0 +1,44 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+import { TraceListAPIResponse } from 'x-pack/plugins/apm/server/lib/traces/get_top_traces';
+import { TraceAPIResponse } from 'x-pack/plugins/apm/server/lib/traces/get_trace';
+import { IUrlParams } from '../../../store/urlParams';
+import { callApi } from '../callApi';
+import { addVersion, getEncodedEsQuery } from './apm';
+
+export async function loadTrace({ traceId, start, end }: IUrlParams) {
+  const hits = await callApi<TraceAPIResponse>(
+    {
+      pathname: `/api/apm/traces/${traceId}`,
+      query: {
+        start,
+        end
+      }
+    },
+    {
+      camelcase: false
+    }
+  );
+
+  return hits.map(addVersion);
+}
+
+export async function loadTraceList({ start, end, kuery }: IUrlParams) {
+  const groups = await callApi<TraceListAPIResponse>({
+    pathname: '/api/apm/traces',
+    query: {
+      start,
+      end,
+      esFilterQuery: await getEncodedEsQuery(kuery)
+    }
+  });
+
+  return groups.map(group => {
+    group.sample = addVersion(group.sample);
+    return group;
+  });
+}
diff --git a/x-pack/plugins/apm/public/services/rest/apm/transaction_groups.ts b/x-pack/plugins/apm/public/services/rest/apm/transaction_groups.ts
new file mode 100644
index 000000000000..47aff73264d0
--- /dev/null
+++ b/x-pack/plugins/apm/public/services/rest/apm/transaction_groups.ts
@@ -0,0 +1,93 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+import { TimeSeriesAPIResponse } from 'x-pack/plugins/apm/server/lib/transactions/charts';
+import { ITransactionDistributionAPIResponse } from 'x-pack/plugins/apm/server/lib/transactions/distribution';
+import { TransactionListAPIResponse } from 'x-pack/plugins/apm/server/lib/transactions/get_top_transactions';
+import { IUrlParams } from '../../../store/urlParams';
+import { callApi } from '../callApi';
+import { addVersion, getEncodedEsQuery } from './apm';
+
+export async function loadTransactionList({
+  serviceName,
+  start,
+  end,
+  kuery,
+  transactionType = 'request'
+}: IUrlParams) {
+  const groups = await callApi<TransactionListAPIResponse>({
+    pathname: `/api/apm/services/${serviceName}/transaction_groups/${transactionType}`,
+    query: {
+      start,
+      end,
+      esFilterQuery: await getEncodedEsQuery(kuery)
+    }
+  });
+
+  return groups.map(group => {
+    group.sample = addVersion(group.sample);
+    return group;
+  });
+}
+
+export async function loadTransactionDistribution({
+  serviceName,
+  start,
+  end,
+  transactionName,
+  transactionType = 'request',
+  transactionId,
+  kuery
+}: Required<IUrlParams>) {
+  return callApi<ITransactionDistributionAPIResponse>({
+    pathname: `/api/apm/services/${serviceName}/transaction_groups/${transactionType}/${encodeURIComponent(
+      transactionName
+    )}/distribution`,
+    query: {
+      start,
+      end,
+      transactionId,
+      esFilterQuery: await getEncodedEsQuery(kuery)
+    }
+  });
+}
+
+export async function loadDetailsCharts({
+  serviceName,
+  start,
+  end,
+  kuery,
+  transactionType = 'request',
+  transactionName
+}: Required<IUrlParams>) {
+  return callApi<TimeSeriesAPIResponse>({
+    pathname: `/api/apm/services/${serviceName}/transaction_groups/${transactionType}/${encodeURIComponent(
+      transactionName
+    )}/charts`,
+    query: {
+      start,
+      end,
+      esFilterQuery: await getEncodedEsQuery(kuery)
+    }
+  });
+}
+
+export async function loadOverviewCharts({
+  serviceName,
+  start,
+  end,
+  kuery,
+  transactionType = 'request'
+}: IUrlParams) {
+  return callApi<TimeSeriesAPIResponse>({
+    pathname: `/api/apm/services/${serviceName}/transaction_groups/${transactionType}/charts`,
+    query: {
+      start,
+      end,
+      esFilterQuery: await getEncodedEsQuery(kuery)
+    }
+  });
+}
diff --git a/x-pack/plugins/apm/public/services/rest/apm/transactions.ts b/x-pack/plugins/apm/public/services/rest/apm/transactions.ts
new file mode 100644
index 000000000000..7f2f23476db4
--- /dev/null
+++ b/x-pack/plugins/apm/public/services/rest/apm/transactions.ts
@@ -0,0 +1,62 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+import { TransactionAPIResponse } from 'x-pack/plugins/apm/server/lib/transactions/get_transaction';
+import { SpanListAPIResponse } from 'x-pack/plugins/apm/server/lib/transactions/spans/get_spans';
+import { Span } from 'x-pack/plugins/apm/typings/Span';
+import { IUrlParams } from '../../../store/urlParams';
+import { callApi } from '../callApi';
+import { addVersion, getEncodedEsQuery } from './apm';
+
+export async function loadSpans({
+  serviceName,
+  start,
+  end,
+  transactionId
+}: IUrlParams) {
+  const hits = await callApi<SpanListAPIResponse>({
+    pathname: `/api/apm/services/${serviceName}/transactions/${transactionId}/spans`,
+    query: {
+      start,
+      end
+    }
+  });
+
+  return hits.map(addVersion).map(addSpanId);
+}
+
+function addSpanId(hit: Span, i: number) {
+  if (!hit.span.id) {
+    hit.span.id = i;
+  }
+  return hit;
+}
+
+export async function loadTransaction({
+  serviceName,
+  start,
+  end,
+  transactionId,
+  traceId,
+  kuery
+}: IUrlParams) {
+  const result = await callApi<TransactionAPIResponse>(
+    {
+      pathname: `/api/apm/services/${serviceName}/transactions/${transactionId}`,
+      query: {
+        traceId,
+        start,
+        end,
+        esFilterQuery: await getEncodedEsQuery(kuery)
+      }
+    },
+    {
+      camelcase: false
+    }
+  );
+
+  return addVersion(result);
+}
diff --git a/x-pack/plugins/apm/public/services/rest/xpack.ts b/x-pack/plugins/apm/public/services/rest/xpack.ts
new file mode 100644
index 000000000000..736b63c6fd2e
--- /dev/null
+++ b/x-pack/plugins/apm/public/services/rest/xpack.ts
@@ -0,0 +1,13 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+import { callApi } from './callApi';
+
+export async function loadLicense() {
+  return callApi({
+    pathname: `/api/xpack/v1/info`
+  });
+}
diff --git a/x-pack/plugins/apm/public/store/reactReduxRequest/__jest__/serviceList.test.js b/x-pack/plugins/apm/public/store/reactReduxRequest/__jest__/serviceList.test.js
index 824196fbf878..b45d3bbc76b1 100644
--- a/x-pack/plugins/apm/public/store/reactReduxRequest/__jest__/serviceList.test.js
+++ b/x-pack/plugins/apm/public/store/reactReduxRequest/__jest__/serviceList.test.js
@@ -5,7 +5,7 @@
  */
 
 import React from 'react';
-import * as rest from '../../../services/rest/apm';
+import * as rest from '../../../services/rest/apm/services';
 import { getServiceList, ServiceListRequest } from '../serviceList';
 import { mountWithStore } from '../../../utils/testHelpers';
 
diff --git a/x-pack/plugins/apm/public/store/reactReduxRequest/errorDistribution.js b/x-pack/plugins/apm/public/store/reactReduxRequest/errorDistribution.js
index a800b31f9b3b..a46449e7f614 100644
--- a/x-pack/plugins/apm/public/store/reactReduxRequest/errorDistribution.js
+++ b/x-pack/plugins/apm/public/store/reactReduxRequest/errorDistribution.js
@@ -6,7 +6,7 @@
 
 import React from 'react';
 import { Request } from 'react-redux-request';
-import { loadErrorDistribution } from '../../services/rest/apm';
+import { loadErrorDistribution } from '../../services/rest/apm/error_groups';
 import { createInitialDataSelector } from './helpers';
 
 const ID = 'errorDistribution';
diff --git a/x-pack/plugins/apm/public/store/reactReduxRequest/errorGroup.js b/x-pack/plugins/apm/public/store/reactReduxRequest/errorGroup.js
index 7913bbe83873..471761578354 100644
--- a/x-pack/plugins/apm/public/store/reactReduxRequest/errorGroup.js
+++ b/x-pack/plugins/apm/public/store/reactReduxRequest/errorGroup.js
@@ -7,7 +7,7 @@
 import React from 'react';
 import { createInitialDataSelector } from './helpers';
 import { Request } from 'react-redux-request';
-import { loadErrorGroupDetails } from '../../services/rest/apm';
+import { loadErrorGroupDetails } from '../../services/rest/apm/error_groups';
 
 const ID = 'errorGroupDetails';
 const INITIAL_DATA = {};
diff --git a/x-pack/plugins/apm/public/store/reactReduxRequest/errorGroupList.js b/x-pack/plugins/apm/public/store/reactReduxRequest/errorGroupList.js
index 3d566940f704..9863d5f78352 100644
--- a/x-pack/plugins/apm/public/store/reactReduxRequest/errorGroupList.js
+++ b/x-pack/plugins/apm/public/store/reactReduxRequest/errorGroupList.js
@@ -7,7 +7,7 @@
 import React from 'react';
 import { createInitialDataSelector } from './helpers';
 import { Request } from 'react-redux-request';
-import { loadErrorGroupList } from '../../services/rest/apm';
+import { loadErrorGroupList } from '../../services/rest/apm/error_groups';
 
 const ID = 'errorGroupList';
 const INITIAL_DATA = [];
diff --git a/x-pack/plugins/apm/public/store/reactReduxRequest/license.js b/x-pack/plugins/apm/public/store/reactReduxRequest/license.js
index 148f73544a66..8f24d3bcd877 100644
--- a/x-pack/plugins/apm/public/store/reactReduxRequest/license.js
+++ b/x-pack/plugins/apm/public/store/reactReduxRequest/license.js
@@ -6,7 +6,7 @@
 import React from 'react';
 import { createInitialDataSelector } from './helpers';
 import { Request } from 'react-redux-request';
-import { loadLicense } from '../../services/rest/apm';
+import { loadLicense } from '../../services/rest/xpack';
 
 const ID = 'license';
 const INITIAL_DATA = {
diff --git a/x-pack/plugins/apm/public/store/reactReduxRequest/serviceDetails.js b/x-pack/plugins/apm/public/store/reactReduxRequest/serviceDetails.js
index ea8dc67e7649..bb31f94c4b45 100644
--- a/x-pack/plugins/apm/public/store/reactReduxRequest/serviceDetails.js
+++ b/x-pack/plugins/apm/public/store/reactReduxRequest/serviceDetails.js
@@ -9,7 +9,7 @@ import _ from 'lodash';
 import PropTypes from 'prop-types';
 import { createInitialDataSelector } from './helpers';
 import { Request } from 'react-redux-request';
-import { loadServiceDetails } from '../../services/rest/apm';
+import { loadServiceDetails } from '../../services/rest/apm/services';
 
 const ID = 'serviceDetails';
 const INITIAL_DATA = { types: [] };
diff --git a/x-pack/plugins/apm/public/store/reactReduxRequest/serviceList.tsx b/x-pack/plugins/apm/public/store/reactReduxRequest/serviceList.tsx
index ef5e59649b76..88020ba3537f 100644
--- a/x-pack/plugins/apm/public/store/reactReduxRequest/serviceList.tsx
+++ b/x-pack/plugins/apm/public/store/reactReduxRequest/serviceList.tsx
@@ -7,7 +7,7 @@
 import React from 'react';
 import { Request, RRRRender, RRRRenderResponse } from 'react-redux-request';
 import { IServiceListItem } from 'x-pack/plugins/apm/server/lib/services/get_services';
-import { loadServiceList } from '../../services/rest/apm';
+import { loadServiceList } from '../../services/rest/apm/services';
 import { IReduxState } from '../rootReducer';
 import { IUrlParams } from '../urlParams';
 // @ts-ignore
diff --git a/x-pack/plugins/apm/public/store/reactReduxRequest/traceList.js b/x-pack/plugins/apm/public/store/reactReduxRequest/traceList.js
index 804e40418986..83ac94887e44 100644
--- a/x-pack/plugins/apm/public/store/reactReduxRequest/traceList.js
+++ b/x-pack/plugins/apm/public/store/reactReduxRequest/traceList.js
@@ -7,7 +7,7 @@
 import React from 'react';
 import { Request } from 'react-redux-request';
 import { createSelector } from 'reselect';
-import { loadTraceList } from '../../services/rest/apm';
+import { loadTraceList } from '../../services/rest/apm/traces';
 import { createInitialDataSelector } from './helpers';
 
 const ID = 'traceList';
diff --git a/x-pack/plugins/apm/public/store/reactReduxRequest/transactionDetails.tsx b/x-pack/plugins/apm/public/store/reactReduxRequest/transactionDetails.tsx
index 0e1d5ece186d..eab1d2390061 100644
--- a/x-pack/plugins/apm/public/store/reactReduxRequest/transactionDetails.tsx
+++ b/x-pack/plugins/apm/public/store/reactReduxRequest/transactionDetails.tsx
@@ -7,7 +7,7 @@
 import React from 'react';
 import { Request, RRRRender } from 'react-redux-request';
 import { Transaction } from 'x-pack/plugins/apm/typings/Transaction';
-import { loadTransaction } from '../../services/rest/apm';
+import { loadTransaction } from '../../services/rest/apm/transactions';
 import { IReduxState } from '../rootReducer';
 import { IUrlParams } from '../urlParams';
 // @ts-ignore
diff --git a/x-pack/plugins/apm/public/store/reactReduxRequest/transactionDetailsCharts.tsx b/x-pack/plugins/apm/public/store/reactReduxRequest/transactionDetailsCharts.tsx
index a1872adcd529..437a8c8316df 100644
--- a/x-pack/plugins/apm/public/store/reactReduxRequest/transactionDetailsCharts.tsx
+++ b/x-pack/plugins/apm/public/store/reactReduxRequest/transactionDetailsCharts.tsx
@@ -8,7 +8,7 @@ import React from 'react';
 import { Request, RRRRender } from 'react-redux-request';
 import { createSelector } from 'reselect';
 import { TimeSeriesAPIResponse } from 'x-pack/plugins/apm/server/lib/transactions/charts';
-import { loadCharts } from '../../services/rest/apm';
+import { loadDetailsCharts } from '../../services/rest/apm/transaction_groups';
 import { IReduxState } from '../rootReducer';
 import { getCharts } from '../selectors/chartSelectors';
 import { getUrlParams, IUrlParams } from '../urlParams';
@@ -61,7 +61,7 @@ export function TransactionDetailsChartsRequest({ urlParams, render }: Props) {
   return (
     <Request
       id={ID}
-      fn={loadCharts}
+      fn={loadDetailsCharts}
       args={[
         { serviceName, start, end, transactionType, transactionName, kuery }
       ]}
diff --git a/x-pack/plugins/apm/public/store/reactReduxRequest/transactionDistribution.tsx b/x-pack/plugins/apm/public/store/reactReduxRequest/transactionDistribution.tsx
index d7b40ad87821..d6d302338729 100644
--- a/x-pack/plugins/apm/public/store/reactReduxRequest/transactionDistribution.tsx
+++ b/x-pack/plugins/apm/public/store/reactReduxRequest/transactionDistribution.tsx
@@ -7,7 +7,7 @@
 import React from 'react';
 import { Request, RRRRender, RRRRenderResponse } from 'react-redux-request';
 import { ITransactionDistributionAPIResponse } from 'x-pack/plugins/apm/server/lib/transactions/distribution';
-import { loadTransactionDistribution } from '../../services/rest/apm';
+import { loadTransactionDistribution } from '../../services/rest/apm/transaction_groups';
 import { IReduxState } from '../rootReducer';
 import { IUrlParams } from '../urlParams';
 // @ts-ignore
@@ -41,6 +41,7 @@ export function TransactionDistributionRequest({
 }) {
   const {
     serviceName,
+    transactionType,
     transactionId,
     start,
     end,
@@ -48,7 +49,7 @@ export function TransactionDistributionRequest({
     kuery
   } = urlParams;
 
-  if (!(serviceName && start && end && transactionName)) {
+  if (!(serviceName && transactionType && start && end && transactionName)) {
     return null;
   }
 
@@ -57,7 +58,15 @@ export function TransactionDistributionRequest({
       id={ID}
       fn={loadTransactionDistribution}
       args={[
-        { serviceName, transactionId, start, end, transactionName, kuery }
+        {
+          serviceName,
+          transactionType,
+          transactionId,
+          start,
+          end,
+          transactionName,
+          kuery
+        }
       ]}
       selector={getTransactionDistribution}
       render={render}
diff --git a/x-pack/plugins/apm/public/store/reactReduxRequest/transactionList.js b/x-pack/plugins/apm/public/store/reactReduxRequest/transactionList.js
index 6b1ea039f6cd..9b061d460393 100644
--- a/x-pack/plugins/apm/public/store/reactReduxRequest/transactionList.js
+++ b/x-pack/plugins/apm/public/store/reactReduxRequest/transactionList.js
@@ -7,7 +7,7 @@
 import React from 'react';
 import { createSelector } from 'reselect';
 import { Request } from 'react-redux-request';
-import { loadTransactionList } from '../../services/rest/apm';
+import { loadTransactionList } from '../../services/rest/apm/transaction_groups';
 import { createInitialDataSelector } from './helpers';
 
 const ID = 'transactionList';
diff --git a/x-pack/plugins/apm/public/store/reactReduxRequest/transactionOverviewCharts.tsx b/x-pack/plugins/apm/public/store/reactReduxRequest/transactionOverviewCharts.tsx
index 26d0f879b127..f3bbb58a59ff 100644
--- a/x-pack/plugins/apm/public/store/reactReduxRequest/transactionOverviewCharts.tsx
+++ b/x-pack/plugins/apm/public/store/reactReduxRequest/transactionOverviewCharts.tsx
@@ -9,7 +9,7 @@ import React from 'react';
 import { Request, RRRRender } from 'react-redux-request';
 import { createSelector } from 'reselect';
 import { TimeSeriesAPIResponse } from 'x-pack/plugins/apm/server/lib/transactions/charts';
-import { loadCharts } from '../../services/rest/apm';
+import { loadOverviewCharts } from '../../services/rest/apm/transaction_groups';
 import { IReduxState } from '../rootReducer';
 import { getCharts } from '../selectors/chartSelectors';
 import { getUrlParams, IUrlParams } from '../urlParams';
@@ -61,7 +61,7 @@ export function TransactionOverviewChartsRequest({ urlParams, render }: Props) {
   return (
     <Request
       id={ID}
-      fn={loadCharts}
+      fn={loadOverviewCharts}
       args={[{ serviceName, start, end, transactionType, kuery }]}
       selector={getTransactionOverviewCharts}
       render={render}
diff --git a/x-pack/plugins/apm/public/store/reactReduxRequest/waterfallV1.tsx b/x-pack/plugins/apm/public/store/reactReduxRequest/waterfallV1.tsx
index f04f37c5f60d..3fe9b1a5f120 100644
--- a/x-pack/plugins/apm/public/store/reactReduxRequest/waterfallV1.tsx
+++ b/x-pack/plugins/apm/public/store/reactReduxRequest/waterfallV1.tsx
@@ -17,7 +17,7 @@ import {
   getWaterfall,
   IWaterfall
 } from '../../components/app/TransactionDetails/Transaction/WaterfallContainer/Waterfall/waterfall_helpers/waterfall_helpers';
-import { loadSpans } from '../../services/rest/apm';
+import { loadSpans } from '../../services/rest/apm/transactions';
 import { IUrlParams } from '../urlParams';
 // @ts-ignore
 import { createInitialDataSelector } from './helpers';
diff --git a/x-pack/plugins/apm/public/store/reactReduxRequest/waterfallV2.tsx b/x-pack/plugins/apm/public/store/reactReduxRequest/waterfallV2.tsx
index 996c80bb8a05..b5e9a28a13e3 100644
--- a/x-pack/plugins/apm/public/store/reactReduxRequest/waterfallV2.tsx
+++ b/x-pack/plugins/apm/public/store/reactReduxRequest/waterfallV2.tsx
@@ -14,7 +14,7 @@ import {
   getWaterfall,
   IWaterfall
 } from '../../components/app/TransactionDetails/Transaction/WaterfallContainer/Waterfall/waterfall_helpers/waterfall_helpers';
-import { loadTrace } from '../../services/rest/apm';
+import { loadTrace } from '../../services/rest/apm/traces';
 import { IUrlParams } from '../urlParams';
 // @ts-ignore
 import { createInitialDataSelector } from './helpers';
diff --git a/x-pack/plugins/apm/server/lib/transaction_groups/__snapshots__/fetcher.test.ts.snap b/x-pack/plugins/apm/server/lib/transaction_groups/__snapshots__/fetcher.test.ts.snap
index 9e180f3fcdb5..3701094ba818 100644
--- a/x-pack/plugins/apm/server/lib/transaction_groups/__snapshots__/fetcher.test.ts.snap
+++ b/x-pack/plugins/apm/server/lib/transaction_groups/__snapshots__/fetcher.test.ts.snap
@@ -26,6 +26,9 @@ Array [
                 "top_hits": Object {
                   "size": 1,
                   "sort": Array [
+                    Object {
+                      "_score": "desc",
+                    },
                     Object {
                       "@timestamp": Object {
                         "order": "desc",
@@ -34,11 +37,16 @@ Array [
                   ],
                 },
               },
+              "sum": Object {
+                "sum": Object {
+                  "field": "transaction.duration.us",
+                },
+              },
             },
             "terms": Object {
               "field": "transaction.name.keyword",
               "order": Object {
-                "avg": "desc",
+                "sum": "desc",
               },
               "size": 100,
             },
diff --git a/x-pack/plugins/apm/server/lib/transaction_groups/__snapshots__/transform.test.ts.snap b/x-pack/plugins/apm/server/lib/transaction_groups/__snapshots__/transform.test.ts.snap
index a68d7dc80338..2d8b16e95f76 100644
--- a/x-pack/plugins/apm/server/lib/transaction_groups/__snapshots__/transform.test.ts.snap
+++ b/x-pack/plugins/apm/server/lib/transaction_groups/__snapshots__/transform.test.ts.snap
@@ -4,7 +4,7 @@ exports[`transactionGroupsTransformer should match snapshot 1`] = `
 Array [
   Object {
     "averageResponseTime": 255966.30555555556,
-    "impact": 4.369340653255684,
+    "impact": 4.3693406535517445,
     "name": "POST /api/orders",
     "p95": 320238.5,
     "sample": Object {
@@ -255,7 +255,7 @@ baz",
   },
   Object {
     "averageResponseTime": 33265.03326147213,
-    "impact": 10.256357027900046,
+    "impact": 10.256357027376065,
     "name": "GET /api/orders",
     "p95": 58827.489999999976,
     "sample": Object {
@@ -376,7 +376,7 @@ baz",
   },
   Object {
     "averageResponseTime": 32900.72714285714,
-    "impact": 2.179120743402716,
+    "impact": 2.1791207411745854,
     "name": "GET /log-message",
     "p95": 40444,
     "sample": Object {
@@ -497,7 +497,7 @@ baz",
   },
   Object {
     "averageResponseTime": 32554.36257814184,
-    "impact": 14.344171564855404,
+    "impact": 14.344171563678346,
     "name": "GET /api/stats",
     "p95": 59356.73611111111,
     "sample": Object {
@@ -624,7 +624,7 @@ baz",
   },
   Object {
     "averageResponseTime": 32387.73641304348,
-    "impact": 2.2558112391673664,
+    "impact": 2.2558112380477584,
     "name": "GET /log-error",
     "p95": 40061.1,
     "sample": Object {
@@ -745,7 +745,7 @@ baz",
   },
   Object {
     "averageResponseTime": 32159.926322043968,
-    "impact": 10.279049521913821,
+    "impact": 10.27904952170656,
     "name": "GET /api/customers",
     "p95": 59845.85714285714,
     "sample": Object {
@@ -872,7 +872,7 @@ baz",
   },
   Object {
     "averageResponseTime": 27516.89144558744,
-    "impact": 9.651458993728006,
+    "impact": 9.651458992731666,
     "name": "GET /api/products/top",
     "p95": 56064.679999999986,
     "sample": Object {
@@ -1000,7 +1000,7 @@ baz",
   },
   Object {
     "averageResponseTime": 21331.714285714286,
-    "impact": 0.28817488008070574,
+    "impact": 0.28817487960409877,
     "name": "POST /api",
     "p95": 30938,
     "sample": Object {
@@ -1123,7 +1123,7 @@ baz",
   },
   Object {
     "averageResponseTime": 17189.329210275926,
-    "impact": 3.424381788267164,
+    "impact": 3.424381787142002,
     "name": "GET /api/products/:id/customers",
     "p95": 39284.79999999999,
     "sample": Object {
@@ -1250,7 +1250,7 @@ baz",
   },
   Object {
     "averageResponseTime": 12763.68806073154,
-    "impact": 1.747992435179465,
+    "impact": 1.7479924334286208,
     "name": "GET /api/types/:id",
     "p95": 30576.749999999996,
     "sample": Object {
@@ -1371,7 +1371,7 @@ baz",
   },
   Object {
     "averageResponseTime": 12683.190864600327,
-    "impact": 4.4239778511514745,
+    "impact": 4.4239778504968,
     "name": "GET /api/products",
     "p95": 35009.67999999999,
     "sample": Object {
@@ -1492,7 +1492,7 @@ baz",
   },
   Object {
     "averageResponseTime": 11257.757916666667,
-    "impact": 2.558180605423081,
+    "impact": 2.558180605569336,
     "name": "GET /api/types",
     "p95": 35222.944444444445,
     "sample": Object {
@@ -1613,7 +1613,7 @@ baz",
   },
   Object {
     "averageResponseTime": 10584.05144193297,
-    "impact": 1.2808106158729446,
+    "impact": 1.280810614916383,
     "name": "GET /api/orders/:id",
     "p95": 26555.399999999998,
     "sample": Object {
@@ -1732,7 +1732,7 @@ baz",
   },
   Object {
     "averageResponseTime": 10548.218597063622,
-    "impact": 1.8338764008269306,
+    "impact": 1.8338763992340905,
     "name": "GET /api/products/:id",
     "p95": 28413.383333333328,
     "sample": Object {
@@ -1853,7 +1853,7 @@ baz",
   },
   Object {
     "averageResponseTime": 9868.217894736843,
-    "impact": 1.7722323979309487,
+    "impact": 1.7722323960215767,
     "name": "GET /api/customers/:id",
     "p95": 27486.5,
     "sample": Object {
@@ -2111,7 +2111,7 @@ baz",
   },
   Object {
     "averageResponseTime": 4694.005586592179,
-    "impact": 0.1498514997591876,
+    "impact": 0.1498515000753004,
     "name": "GET /is-it-coffee-time",
     "p95": 11022.99999999992,
     "sample": Object {
@@ -2233,7 +2233,7 @@ baz",
   },
   Object {
     "averageResponseTime": 4549.889880952381,
-    "impact": 0.1354336505457395,
+    "impact": 0.13543365054509587,
     "name": "GET /throw-error",
     "p95": 7719.700000000001,
     "sample": Object {
@@ -2355,7 +2355,7 @@ baz",
   },
   Object {
     "averageResponseTime": 3504.5108924806746,
-    "impact": 2.36009934580083,
+    "impact": 2.3600993453143766,
     "name": "GET *",
     "p95": 11431.738095238095,
     "sample": Object {
@@ -2482,7 +2482,7 @@ baz",
   },
   Object {
     "averageResponseTime": 2742.4615384615386,
-    "impact": 0.08501029113483448,
+    "impact": 0.08501028923348058,
     "name": "OPTIONS unknown route",
     "p95": 4370.000000000002,
     "sample": Object {
@@ -2605,7 +2605,7 @@ baz",
   },
   Object {
     "averageResponseTime": 2651.8784461553205,
-    "impact": 15.770246498769827,
+    "impact": 15.770246496477105,
     "name": "GET static file",
     "p95": 6140.579335038363,
     "sample": Object {
@@ -2713,7 +2713,7 @@ baz",
   },
   Object {
     "averageResponseTime": 1422.926672899693,
-    "impact": 1.002712481568783,
+    "impact": 1.0027124806135428,
     "name": "GET unknown route",
     "p95": 2311.885238095238,
     "sample": Object {
diff --git a/x-pack/plugins/apm/server/lib/transaction_groups/fetcher.ts b/x-pack/plugins/apm/server/lib/transaction_groups/fetcher.ts
index 9ab287402c56..ad0aa00d35bc 100644
--- a/x-pack/plugins/apm/server/lib/transaction_groups/fetcher.ts
+++ b/x-pack/plugins/apm/server/lib/transaction_groups/fetcher.ts
@@ -16,14 +16,9 @@ import { Setup } from '../helpers/setup_request';
 interface Bucket {
   key: string;
   doc_count: number;
-  avg: {
-    value: number;
-  };
-  p95: {
-    values: {
-      '95.0': number;
-    };
-  };
+  avg: { value: number };
+  p95: { values: { '95.0': number } };
+  sum: { value: number };
   sample: {
     hits: {
       total: number;
@@ -57,20 +52,24 @@ export function transactionGroupsFetcher(
         transactions: {
           terms: {
             field: `${TRANSACTION_NAME}.keyword`,
-            order: { avg: 'desc' },
+            order: { sum: 'desc' },
             size: 100
           },
           aggs: {
             sample: {
               top_hits: {
                 size: 1,
-                sort: [{ '@timestamp': { order: 'desc' } }]
+                sort: [
+                  { _score: 'desc' }, // sort by _score to ensure that buckets with sampled:true ends up on top
+                  { '@timestamp': { order: 'desc' } }
+                ]
               }
             },
             avg: { avg: { field: TRANSACTION_DURATION } },
             p95: {
               percentiles: { field: TRANSACTION_DURATION, percents: [95] }
-            }
+            },
+            sum: { sum: { field: TRANSACTION_DURATION } }
           }
         }
       }
diff --git a/x-pack/plugins/apm/server/lib/transaction_groups/mock-responses/transactionGroupsResponse.ts b/x-pack/plugins/apm/server/lib/transaction_groups/mock-responses/transactionGroupsResponse.ts
index 08492ee7a783..2632cc6e94b9 100644
--- a/x-pack/plugins/apm/server/lib/transaction_groups/mock-responses/transactionGroupsResponse.ts
+++ b/x-pack/plugins/apm/server/lib/transaction_groups/mock-responses/transactionGroupsResponse.ts
@@ -21,6 +21,7 @@ export const transactionGroupsResponse = ({
           doc_count: 180,
           avg: { value: 255966.30555555556 },
           p95: { values: { '95.0': 320238.5 } },
+          sum: { value: 46073935 },
           sample: {
             hits: {
               total: 180,
@@ -140,6 +141,7 @@ export const transactionGroupsResponse = ({
           doc_count: 21911,
           avg: { value: 48021.972616494 },
           p95: { values: { '95.0': 67138.18364917398 } },
+          sum: { value: 1052209442 },
           sample: {
             hits: {
               total: 21911,
@@ -259,6 +261,7 @@ export const transactionGroupsResponse = ({
           doc_count: 3247,
           avg: { value: 33265.03326147213 },
           p95: { values: { '95.0': 58827.489999999976 } },
+          sum: { value: 108011563 },
           sample: {
             hits: {
               total: 3247,
@@ -374,6 +377,7 @@ export const transactionGroupsResponse = ({
           doc_count: 700,
           avg: { value: 32900.72714285714 },
           p95: { values: { '95.0': 40444 } },
+          sum: { value: 23030509 },
           sample: {
             hits: {
               total: 700,
@@ -489,6 +493,7 @@ export const transactionGroupsResponse = ({
           doc_count: 4639,
           avg: { value: 32554.36257814184 },
           p95: { values: { '95.0': 59356.73611111111 } },
+          sum: { value: 151019688 },
           sample: {
             hits: {
               total: 4639,
@@ -609,6 +614,7 @@ export const transactionGroupsResponse = ({
           doc_count: 736,
           avg: { value: 32387.73641304348 },
           p95: { values: { '95.0': 40061.1 } },
+          sum: { value: 23837374 },
           sample: {
             hits: {
               total: 736,
@@ -724,6 +730,7 @@ export const transactionGroupsResponse = ({
           doc_count: 3366,
           avg: { value: 32159.926322043968 },
           p95: { values: { '95.0': 59845.85714285714 } },
+          sum: { value: 108250312 },
           sample: {
             hits: {
               total: 3366,
@@ -844,6 +851,7 @@ export const transactionGroupsResponse = ({
           doc_count: 3694,
           avg: { value: 27516.89144558744 },
           p95: { values: { '95.0': 56064.679999999986 } },
+          sum: { value: 101647397 },
           sample: {
             hits: {
               total: 3694,
@@ -965,6 +973,7 @@ export const transactionGroupsResponse = ({
           doc_count: 147,
           avg: { value: 21331.714285714286 },
           p95: { values: { '95.0': 30938 } },
+          sum: { value: 3135762 },
           sample: {
             hits: {
               total: 147,
@@ -1082,6 +1091,7 @@ export const transactionGroupsResponse = ({
           doc_count: 2102,
           avg: { value: 17189.329210275926 },
           p95: { values: { '95.0': 39284.79999999999 } },
+          sum: { value: 36131970 },
           sample: {
             hits: {
               total: 2102,
@@ -1203,6 +1213,7 @@ export const transactionGroupsResponse = ({
           doc_count: 1449,
           avg: { value: 12763.68806073154 },
           p95: { values: { '95.0': 30576.749999999996 } },
+          sum: { value: 18494584 },
           sample: {
             hits: {
               total: 1449,
@@ -1318,6 +1329,7 @@ export const transactionGroupsResponse = ({
           doc_count: 3678,
           avg: { value: 12683.190864600327 },
           p95: { values: { '95.0': 35009.67999999999 } },
+          sum: { value: 46648776 },
           sample: {
             hits: {
               total: 3678,
@@ -1433,6 +1445,7 @@ export const transactionGroupsResponse = ({
           doc_count: 2400,
           avg: { value: 11257.757916666667 },
           p95: { values: { '95.0': 35222.944444444445 } },
+          sum: { value: 27018619 },
           sample: {
             hits: {
               total: 2400,
@@ -1548,6 +1561,7 @@ export const transactionGroupsResponse = ({
           doc_count: 1283,
           avg: { value: 10584.05144193297 },
           p95: { values: { '95.0': 26555.399999999998 } },
+          sum: { value: 13579338 },
           sample: {
             hits: {
               total: 1283,
@@ -1661,6 +1675,7 @@ export const transactionGroupsResponse = ({
           doc_count: 1839,
           avg: { value: 10548.218597063622 },
           p95: { values: { '95.0': 28413.383333333328 } },
+          sum: { value: 19398174 },
           sample: {
             hits: {
               total: 1839,
@@ -1776,6 +1791,7 @@ export const transactionGroupsResponse = ({
           doc_count: 1900,
           avg: { value: 9868.217894736843 },
           p95: { values: { '95.0': 27486.5 } },
+          sum: { value: 18749614 },
           sample: {
             hits: {
               total: 1900,
@@ -1896,6 +1912,7 @@ export const transactionGroupsResponse = ({
           doc_count: 20,
           avg: { value: 5192.9 },
           p95: { values: { '95.0': 13230.5 } },
+          sum: { value: 103858 },
           sample: {
             hits: {
               total: 20,
@@ -2021,6 +2038,7 @@ export const transactionGroupsResponse = ({
           doc_count: 358,
           avg: { value: 4694.005586592179 },
           p95: { values: { '95.0': 11022.99999999992 } },
+          sum: { value: 1680454 },
           sample: {
             hits: {
               total: 358,
@@ -2137,6 +2155,7 @@ export const transactionGroupsResponse = ({
           doc_count: 336,
           avg: { value: 4549.889880952381 },
           p95: { values: { '95.0': 7719.700000000001 } },
+          sum: { value: 1528763 },
           sample: {
             hits: {
               total: 336,
@@ -2253,6 +2272,7 @@ export const transactionGroupsResponse = ({
           doc_count: 7115,
           avg: { value: 3504.5108924806746 },
           p95: { values: { '95.0': 11431.738095238095 } },
+          sum: { value: 24934595 },
           sample: {
             hits: {
               total: 7115,
@@ -2375,6 +2395,7 @@ export const transactionGroupsResponse = ({
           doc_count: 364,
           avg: { value: 2742.4615384615386 },
           p95: { values: { '95.0': 4370.000000000002 } },
+          sum: { value: 998256 },
           sample: {
             hits: {
               total: 364,
@@ -2492,6 +2513,7 @@ export const transactionGroupsResponse = ({
           doc_count: 62606,
           avg: { value: 2651.8784461553205 },
           p95: { values: { '95.0': 6140.579335038363 } },
+          sum: { value: 166023502 },
           sample: {
             hits: {
               total: 62606,
@@ -2596,6 +2618,7 @@ export const transactionGroupsResponse = ({
           doc_count: 7487,
           avg: { value: 1422.926672899693 },
           p95: { values: { '95.0': 2311.885238095238 } },
+          sum: { value: 10653452 },
           sample: {
             hits: {
               total: 7487,
diff --git a/x-pack/plugins/apm/server/lib/transaction_groups/transform.test.ts b/x-pack/plugins/apm/server/lib/transaction_groups/transform.test.ts
index 73053aa04643..6acd34af2435 100644
--- a/x-pack/plugins/apm/server/lib/transaction_groups/transform.test.ts
+++ b/x-pack/plugins/apm/server/lib/transaction_groups/transform.test.ts
@@ -19,12 +19,13 @@ describe('transactionGroupsTransformer', () => {
     ).toMatchSnapshot();
   });
 
-  fit('should transform response correctly', () => {
+  it('should transform response correctly', () => {
     const bucket = {
       key: 'POST /api/orders',
       doc_count: 180,
       avg: { value: 255966.30555555556 },
       p95: { values: { '95.0': 320238.5 } },
+      sum: { value: 3000000000 },
       sample: {
         hits: {
           total: 180,
@@ -54,4 +55,27 @@ describe('transactionGroupsTransformer', () => {
       }
     ]);
   });
+
+  it('should calculate impact from sum', () => {
+    const getBucket = (sum: number) => ({
+      key: 'POST /api/orders',
+      doc_count: 180,
+      avg: { value: 300000 },
+      p95: { values: { '95.0': 320000 } },
+      sum: { value: sum },
+      sample: { hits: { total: 180, hits: [{ _source: 'sample source' }] } }
+    });
+
+    const response = ({
+      aggregations: {
+        transactions: { buckets: [getBucket(10), getBucket(20), getBucket(50)] }
+      }
+    } as unknown) as ESResponse;
+
+    expect(
+      transactionGroupsTransformer({ response, start: 100, end: 20000 }).map(
+        bucket => bucket.impact
+      )
+    ).toEqual([0, 25, 100]);
+  });
 });
diff --git a/x-pack/plugins/apm/server/lib/transaction_groups/transform.ts b/x-pack/plugins/apm/server/lib/transaction_groups/transform.ts
index 229134025b18..53f8ca04d4ee 100644
--- a/x-pack/plugins/apm/server/lib/transaction_groups/transform.ts
+++ b/x-pack/plugins/apm/server/lib/transaction_groups/transform.ts
@@ -44,7 +44,7 @@ export function transactionGroupsTransformer({
   const results = buckets.map(bucket => {
     const averageResponseTime = bucket.avg.value;
     const transactionsPerMinute = bucket.doc_count / minutes;
-    const impact = Math.round(averageResponseTime * transactionsPerMinute);
+    const impact = bucket.sum.value;
     const sample = bucket.sample.hits.hits[0]._source;
 
     return {
diff --git a/x-pack/plugins/apm/server/lib/transactions/distribution/calculate_bucket_size.ts b/x-pack/plugins/apm/server/lib/transactions/distribution/calculate_bucket_size.ts
index cb0209f648b9..78c72f39f6ed 100644
--- a/x-pack/plugins/apm/server/lib/transactions/distribution/calculate_bucket_size.ts
+++ b/x-pack/plugins/apm/server/lib/transactions/distribution/calculate_bucket_size.ts
@@ -8,13 +8,15 @@ import { SearchParams } from 'elasticsearch';
 import {
   SERVICE_NAME,
   TRANSACTION_DURATION,
-  TRANSACTION_NAME
+  TRANSACTION_NAME,
+  TRANSACTION_TYPE
 } from '../../../../common/constants';
 import { Setup } from '../../helpers/setup_request';
 
 export async function calculateBucketSize(
   serviceName: string,
   transactionName: string,
+  transactionType: string,
   setup: Setup
 ) {
   const { start, end, esFilterQuery, client, config } = setup;
@@ -27,6 +29,7 @@ export async function calculateBucketSize(
         bool: {
           filter: [
             { term: { [SERVICE_NAME]: serviceName } },
+            { term: { [TRANSACTION_TYPE]: transactionType } },
             { term: { [`${TRANSACTION_NAME}.keyword`]: transactionName } },
             {
               range: {
diff --git a/x-pack/plugins/apm/server/lib/transactions/distribution/get_buckets/fetcher.ts b/x-pack/plugins/apm/server/lib/transactions/distribution/get_buckets/fetcher.ts
index 55212f716316..746606947aa6 100644
--- a/x-pack/plugins/apm/server/lib/transactions/distribution/get_buckets/fetcher.ts
+++ b/x-pack/plugins/apm/server/lib/transactions/distribution/get_buckets/fetcher.ts
@@ -11,7 +11,8 @@ import {
   TRANSACTION_DURATION,
   TRANSACTION_ID,
   TRANSACTION_NAME,
-  TRANSACTION_SAMPLED
+  TRANSACTION_SAMPLED,
+  TRANSACTION_TYPE
 } from 'x-pack/plugins/apm/common/constants';
 import { Setup } from 'x-pack/plugins/apm/server/lib/helpers/setup_request';
 import { Transaction } from 'x-pack/plugins/apm/typings/Transaction';
@@ -38,6 +39,7 @@ export type ESResponse = AggregationSearchResponse<void, Aggs>;
 export function bucketFetcher(
   serviceName: string,
   transactionName: string,
+  transactionType: string,
   transactionId: string,
   bucketSize: number,
   setup: Setup
@@ -52,6 +54,7 @@ export function bucketFetcher(
         bool: {
           filter: [
             { term: { [SERVICE_NAME]: serviceName } },
+            { term: { [TRANSACTION_TYPE]: transactionType } },
             { term: { [`${TRANSACTION_NAME}.keyword`]: transactionName } },
             {
               range: {
diff --git a/x-pack/plugins/apm/server/lib/transactions/distribution/get_buckets/index.ts b/x-pack/plugins/apm/server/lib/transactions/distribution/get_buckets/index.ts
index debc639104d9..8b5ffce6c1b1 100644
--- a/x-pack/plugins/apm/server/lib/transactions/distribution/get_buckets/index.ts
+++ b/x-pack/plugins/apm/server/lib/transactions/distribution/get_buckets/index.ts
@@ -11,6 +11,7 @@ import { bucketTransformer } from './transform';
 export async function getBuckets(
   serviceName: string,
   transactionName: string,
+  transactionType: string,
   transactionId: string,
   bucketSize: number,
   setup: Setup
@@ -18,6 +19,7 @@ export async function getBuckets(
   const response = await bucketFetcher(
     serviceName,
     transactionName,
+    transactionType,
     transactionId,
     bucketSize,
     setup
diff --git a/x-pack/plugins/apm/server/lib/transactions/distribution/index.ts b/x-pack/plugins/apm/server/lib/transactions/distribution/index.ts
index 25c19f11d58c..16e46191b5f4 100644
--- a/x-pack/plugins/apm/server/lib/transactions/distribution/index.ts
+++ b/x-pack/plugins/apm/server/lib/transactions/distribution/index.ts
@@ -19,18 +19,21 @@ export interface ITransactionDistributionAPIResponse {
 export async function getDistribution(
   serviceName: string,
   transactionName: string,
+  transactionType: string,
   transactionId: string,
   setup: Setup
 ): Promise<ITransactionDistributionAPIResponse> {
   const bucketSize = await calculateBucketSize(
     serviceName,
     transactionName,
+    transactionType,
     setup
   );
 
   const { defaultSample, buckets, totalHits } = await getBuckets(
     serviceName,
     transactionName,
+    transactionType,
     transactionId,
     bucketSize,
     setup
diff --git a/x-pack/plugins/apm/server/routes/transaction_groups.ts b/x-pack/plugins/apm/server/routes/transaction_groups.ts
new file mode 100644
index 000000000000..23f65eeb1819
--- /dev/null
+++ b/x-pack/plugins/apm/server/routes/transaction_groups.ts
@@ -0,0 +1,110 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+import Boom from 'boom';
+import { Server } from 'hapi';
+import Joi from 'joi';
+import { withDefaultValidators } from '../lib/helpers/input_validation';
+import { setupRequest } from '../lib/helpers/setup_request';
+import { getChartsData } from '../lib/transactions/charts';
+import { getDistribution } from '../lib/transactions/distribution';
+import { getTopTransactions } from '../lib/transactions/get_top_transactions';
+
+const defaultErrorHandler = (err: Error) => {
+  // tslint:disable-next-line
+  console.error(err.stack);
+  throw Boom.boomify(err, { statusCode: 400 });
+};
+
+export function initTransactionGroupsApi(server: Server) {
+  server.route({
+    method: 'GET',
+    path:
+      '/api/apm/services/{serviceName}/transaction_groups/{transactionType}',
+    options: {
+      validate: {
+        query: withDefaultValidators({
+          query: Joi.string()
+        })
+      }
+    },
+    handler: req => {
+      const { serviceName, transactionType } = req.params;
+      const setup = setupRequest(req);
+
+      return getTopTransactions({
+        serviceName,
+        transactionType,
+        setup
+      }).catch(defaultErrorHandler);
+    }
+  });
+
+  server.route({
+    method: 'GET',
+    path: `/api/apm/services/{serviceName}/transaction_groups/{transactionType}/charts`,
+    options: {
+      validate: {
+        query: withDefaultValidators()
+      }
+    },
+    handler: req => {
+      const setup = setupRequest(req);
+      const { serviceName, transactionType } = req.params;
+
+      return getChartsData({
+        serviceName,
+        transactionType,
+        setup
+      }).catch(defaultErrorHandler);
+    }
+  });
+
+  server.route({
+    method: 'GET',
+    path: `/api/apm/services/{serviceName}/transaction_groups/{transactionType}/{transactionName}/charts`,
+    options: {
+      validate: {
+        query: withDefaultValidators()
+      }
+    },
+    handler: req => {
+      const setup = setupRequest(req);
+      const { serviceName, transactionType, transactionName } = req.params;
+
+      return getChartsData({
+        serviceName,
+        transactionType,
+        transactionName,
+        setup
+      }).catch(defaultErrorHandler);
+    }
+  });
+
+  server.route({
+    method: 'GET',
+    path: `/api/apm/services/{serviceName}/transaction_groups/{transactionType}/{transactionName}/distribution`,
+    options: {
+      validate: {
+        query: withDefaultValidators({
+          transactionId: Joi.string().default('')
+        })
+      }
+    },
+    handler: req => {
+      const setup = setupRequest(req);
+      const { serviceName, transactionType, transactionName } = req.params;
+      const { transactionId } = req.query as { transactionId: string };
+      return getDistribution(
+        serviceName,
+        transactionName,
+        transactionType,
+        transactionId,
+        setup
+      ).catch(defaultErrorHandler);
+    }
+  });
+}
diff --git a/x-pack/plugins/apm/server/routes/transactions.ts b/x-pack/plugins/apm/server/routes/transactions.ts
index f891d2b93734..1b1bd12f8bce 100644
--- a/x-pack/plugins/apm/server/routes/transactions.ts
+++ b/x-pack/plugins/apm/server/routes/transactions.ts
@@ -9,13 +9,9 @@ import { Server } from 'hapi';
 import Joi from 'joi';
 import { withDefaultValidators } from '../lib/helpers/input_validation';
 import { setupRequest } from '../lib/helpers/setup_request';
-import { getChartsData } from '../lib/transactions/charts';
-import { getDistribution } from '../lib/transactions/distribution';
-import { getTopTransactions } from '../lib/transactions/get_top_transactions';
 import { getTransaction } from '../lib/transactions/get_transaction';
 import { getSpans } from '../lib/transactions/spans/get_spans';
 
-const ROOT = '/api/apm/services/{serviceName}/transactions';
 const defaultErrorHandler = (err: Error) => {
   // tslint:disable-next-line
   console.error(err.stack);
@@ -25,37 +21,11 @@ const defaultErrorHandler = (err: Error) => {
 export function initTransactionsApi(server: Server) {
   server.route({
     method: 'GET',
-    path: ROOT,
+    path: `/api/apm/services/{serviceName}/transactions/{transactionId}`,
     options: {
       validate: {
         query: withDefaultValidators({
-          transaction_type: Joi.string().default('request'),
-          query: Joi.string()
-        })
-      }
-    },
-    handler: req => {
-      const { serviceName } = req.params;
-      const { transaction_type: transactionType } = req.query as {
-        transaction_type: string;
-      };
-      const setup = setupRequest(req);
-
-      return getTopTransactions({
-        serviceName,
-        transactionType,
-        setup
-      }).catch(defaultErrorHandler);
-    }
-  });
-
-  server.route({
-    method: 'GET',
-    path: `${ROOT}/{transactionId}`,
-    options: {
-      validate: {
-        query: withDefaultValidators({
-          traceId: Joi.string().allow('')
+          traceId: Joi.string().allow('') // TODO: this should be a path param and made required by 7.0
         })
       }
     },
@@ -69,9 +39,10 @@ export function initTransactionsApi(server: Server) {
     }
   });
 
+  // TODO: this can be removed by 7.0 when v1 compatability can be dropped
   server.route({
     method: 'GET',
-    path: `${ROOT}/{transactionId}/spans`,
+    path: `/api/apm/services/{serviceName}/transactions/{transactionId}/spans`,
     options: {
       validate: {
         query: withDefaultValidators()
@@ -83,65 +54,4 @@ export function initTransactionsApi(server: Server) {
       return getSpans(transactionId, setup).catch(defaultErrorHandler);
     }
   });
-
-  server.route({
-    method: 'GET',
-    path: `${ROOT}/charts`,
-    options: {
-      validate: {
-        query: withDefaultValidators({
-          transaction_type: Joi.string().default('request'),
-          transaction_name: Joi.string(),
-          query: Joi.string()
-        })
-      }
-    },
-    handler: req => {
-      const setup = setupRequest(req);
-      const { serviceName } = req.params;
-      const { transaction_type: transactionType } = req.query as {
-        transaction_type: string;
-      };
-      const { transaction_name: transactionName } = req.query as {
-        transaction_name: string;
-      };
-
-      return getChartsData({
-        serviceName,
-        transactionType,
-        transactionName,
-        setup
-      }).catch(defaultErrorHandler);
-    }
-  });
-
-  server.route({
-    method: 'GET',
-    path: `${ROOT}/distribution`,
-    options: {
-      validate: {
-        query: withDefaultValidators({
-          transaction_name: Joi.string().required(),
-          transaction_id: Joi.string().default('')
-        })
-      }
-    },
-    handler: req => {
-      const setup = setupRequest(req);
-      const { serviceName } = req.params;
-      const {
-        transaction_name: transactionName,
-        transaction_id: transactionId
-      } = req.query as {
-        transaction_name: string;
-        transaction_id: string;
-      };
-      return getDistribution(
-        serviceName,
-        transactionName,
-        transactionId,
-        setup
-      ).catch(defaultErrorHandler);
-    }
-  });
 }