synapse/docs/admin_api/media_admin_api.md

List all media in a room

This API gets a list of known media in a room.

The API is:

GET /_synapse/admin/v1/room/<room_id>/media

including an access_token of a server admin.

It returns a JSON body like the following:

{
    "local": [
        "mxc://localhost/xwvutsrqponmlkjihgfedcba",
        "mxc://localhost/abcdefghijklmnopqrstuvwx"
    ],
    "remote": [
        "mxc://matrix.org/xwvutsrqponmlkjihgfedcba",
        "mxc://matrix.org/abcdefghijklmnopqrstuvwx"
    ]
}