Step 3 of 5

# HTTP method & format

Choose the HTTP verb this operation sends and configure content negotiation headers. Crank will serialize MCP tool arguments into the appropriate request body format.

HTTP method
Verb sent to the upstream on every tool invocation
Required
Request format
Content negotiation and serialisation
Optional
Content-Type
How the request body is encoded when sent to the upstream.
Accept
Accepted response content types from the upstream server.