HTTP 405 Method Not Allowed

What Does HTTP 405 Mean?

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

For example, a read-only resource might accept GET and HEAD but return 405 for POST, PUT, and DELETE requests. An API endpoint designed only for POST submissions would return 405 for GET requests.

HTTP 405 differs from 501 (Not Implemented): 405 means the method is recognized but not allowed for this specific resource, while 501 means the server doesn't support the method at all.

Common Causes of 405 Method Not Allowed

The HTTP method used is not allowed for the requested resource. Common causes: sending POST to a read-only endpoint, attempting DELETE on a resource that doesn't support it, using PUT on a collection endpoint, and incorrect API method specification.

The Allow response header lists the methods that are supported for the resource.

How to Fix 405 Method Not Allowed

For API users: check the API documentation for the correct HTTP method (GET vs POST vs PUT). For developers: add the Allow header to 405 responses listing supported methods, and verify your routing configuration maps methods correctly.

Common mistake: using GET for operations that require POST, or vice versa.

Related Status Codes

Frequently Asked Questions

What does HTTP 405 mean?

HTTP 405 Method Not Allowed is a client error response. HTTP 405 Method Not Allowed indicates that the request method (GET, POST, PUT, DELETE, etc.) is not supported for the target resource. The server must include an Allow header listing the methods that

Is HTTP 405 an error?

Yes, HTTP 405 is a client error. Client Error responses (cli) indicate the request contains an error.

How do I fix HTTP 405?

For API users: check the API documentation for the correct HTTP method (GET vs POST vs PUT). For developers: add the Allow header to 405 responses listing supported methods, and verify your routing configuration maps methods correctly.

What causes HTTP 405 Method Not Allowed?

The HTTP method used is not allowed for the requested resource. Common causes: sending POST to a read-only endpoint, attempting DELETE on a resource that doesn't support it, using PUT on a collection endpoint, and incorrect API method specification.

Is HTTP 405 permanent or temporary?

HTTP 405 is situational — it depends on the underlying cause. Fix the root cause to resolve it.

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