Admin API to redact message event

[ktnhuni]

Is there any way for a API admin to delete a specific message event from a room?

[DMRobertson]

We don't have an easy way to do this via the Admin API at present. Most people use a bot like Mjolnir (or perhaps the fork Draupnir---note, not maintained by the Matrix.org Foundation) for event deletion like this (redaction).

If the message creator or a room admin/moderator belongs to your homeserver, you could

• Use https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#login-as-a-user to get an access token for that user
• Manually issue a redaction using that access token
• Delete that access token with a /logout call (as per the Synapse docs).

However this is a "nuclear" approach and takes over a user's account---it's best used as a last resort only.

[DMRobertson]

I suggest we leave this issue open as a request to provide an API that does something like this. For your specific situation, I'll have to redirect you to the Synapse Admins room for community support.