Create an MCP Proxy definition. The request body is a Tyk OAS document that
must contain x-tyk-api-gateway with MCP configuration. The payload is
validated against the MCP JSON schema and rejected if it uses any restricted
middleware (transformRequestMethod, transformResponseBody, urlRewrite,
internal, cache, validateRequest, mockResponse).
Documentation Index
Fetch the complete documentation index at: https://tyk.io/docs/llms.txt
Use this file to discover all available pages before exploring further.