POST /messages

Create a message

Detail	Value
Operation ID	ai.createMessage
Method	POST
Path	/messages
Connector	Anthropic

Parameters

No parameters.

Request Body

Field	Type
model	string
max_tokens	integer
messages	array

Using this endpoint in a workflow

1. Add an API Call node to your workflow.
2. Pick your Anthropic connection from the Connection dropdown.
3. In the Operation dropdown, select ai.createMessage.
4. Fill in the parameter fields that appear. Use {{...}} to reference upstream values.

Required fields are marked — fill them or the call will fail at runtime.

What it returns

The API Call node writes the response to the workflow context:

{
  status: 200,
  success: true,
  data: { ...response body from the API... },
  latencyMs: 142
}

Reference response fields downstream as {{nodeId.data.path}}. The exact response shape is documented on the upstream Anthropic API reference.