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v1

latestOpenAPI 3.1.0Proprietary2026-07-1434570540.9 KB
Directory

Post a Group Message

Post a Sender Key encrypted message envelope to a group; the relay fans it out to every active member except the sender. The body carries the same MessageEnvelope shape as the direct relay (the to field is filled in per recipient during fan-out).

post/directory/groups/{id}/messages

Path parameters

idstring required

Id of the group to post the message to.

Request body

bodystring byte required

Base64-encoded ciphertext. For group messages, clients Sender Key encrypt an A2A JSON-RPC request or response before placing the ciphertext here.

contentHintstring
deviceIdinteger required
fromstring required
idstring required
timestampstring date-time
tostring required
type'CIPHERTEXT' | 'PREKEY_BUNDLE' required

Response

Accepted

fanoutinteger required
groupIdstring required
messageIdsobject required
recipientsstring[] required
sourceMessageIdstring required