{ "title": "Post Message to Stream", "description": "Example of posting a MessageML message to a Symphony stream", "operation": "POST /v4/stream/{sid}/message/create", "request": { "headers": { "sessionToken": "eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiJ9...", "keyManagerToken": "eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiJ9...", "Content-Type": "multipart/form-data" }, "path": { "sid": "xhGidUNqcy5CJKNTM5s4Bn___rCZl7KqdA" }, "body": { "message": "

Hello,

Here is today's market summary:

AAPL$185.20
MSFT$378.85
", "data": "{\"entityIdentifier\":\"market-summary\",\"date\":\"2026-05-03\"}" } }, "response": { "status": 200, "body": { "messageId": "msg_ABC123xyz", "timestamp": 1746230400000, "message": "

Hello, John Doe

Here is today's market summary:

AAPL$185.20
MSFT$378.85
", "user": { "userId": 987654321, "firstName": "Market", "lastName": "Bot", "displayName": "Market Summary Bot", "email": "marketbot@acme.com", "username": "market-summary-bot" }, "stream": { "streamId": "xhGidUNqcy5CJKNTM5s4Bn___rCZl7KqdA", "streamType": { "type": "ROOM" } }, "externalRecipients": false, "sid": 1234 } } }