In nGrinder, an open-source performance testing tool, the error “HTTP Patch not supported” arises because the tool’s default HTTP client does not fully implement or
healthcare support services allow the PATCH HTTP method. Grinder is built on top of the Grinder framework, which primarily supports common HTTP methods like GET, POST, PUT, and DELETE. When a test script attempts to send a PATCH request, the underlying HTTP client may throw this error since it lacks native handling for it.