Send a chat message and get the complete response (non-streaming)

Accepts a user message, stores it in the chat session, routes it to the specified agent, waits for the complete response, and returns it as simple text. Designed for integrations that don’t need streaming (e.g., Slack bot).

POST /chat-sessions/send-message-sync

Send a chat message and get the complete response (non-streaming)

cURL

curl --request POST \
  --url https://api.flipsidecrypto.xyz/public/v3/chat-sessions/send-message-sync \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --header 'x-session-id: <x-session-id>' \
  --data '
{
  "messages": [
    null
  ],
  "agentName": "flipside_agent"
}
'

200

{
  "response": "<string>"
}

Authorizations

x-api-key · string · header · required

Headers

x-session-id · string<uuid> · required

The chat session ID

Body

application/json

messages · null[] · required

The UIMessages from the AI SDK representing the user's message

agentName · string · default: flipside_agent

The agent to route this message to. Defaults to flipside_agent if not specified.

Response

200

application/json

Message received and agent response completed successfully

response · string · required

The complete text response from the agent