405 Method Not Allowed

HTTP 405 indicates that the request method (GET, POST, PUT, DELETE, etc.) is not allowed for the target resource. The response must include an Allow header listing the supported methods.

When a client tries to POST to a read-only endpoint or DELETE on a resource that does not support deletion.

• POST sent to a GET-only endpoint
• DELETE on an immutable resource
• Wrong method in API documentation reference
• Misconfigured route handler

• Check the Allow header to see which methods are supported
• Review API documentation for the correct method
• Verify your route handlers explicitly support the methods you need

HTTP/1.1 405 Method Not Allowed
Allow: GET, HEAD, OPTIONS