4xx Client Error

HTTP 405 Method Not Allowed

The HTTP method used is not supported for the requested resource. For example, trying to POST to a read-only endpoint or DELETE a resource that doesn't allow deletion.

Common Causes

  • Using POST on an endpoint that only accepts GET
  • Trying to DELETE a read-only resource
  • API endpoint doesn't support the used HTTP method
  • Web form action pointing to wrong endpoint

How to Fix

  1. 1Check the Allow response header for supported methods
  2. 2Review API documentation for the correct HTTP method
  3. 3Ensure your client is sending the right method (GET, POST, etc.)

Example

HTTP 405 Method Not Allowed
DELETE /api/users HTTP/1.1

→ 405 Method Not Allowed
→ Allow: GET, POST

Related Client Error Codes

400

Bad Request

401

Unauthorized

402

Payment Required

403

Forbidden

404

Not Found

406

Not Acceptable

407

Proxy Authentication Required

408

Request Timeout

409

Conflict

410

Gone

411

Length Required

412

Precondition Failed

413

Content Too Large

414

URI Too Long

415

Unsupported Media Type

416

Range Not Satisfiable

417

Expectation Failed

418

I'm a Teapot

421

Misdirected Request

422

Unprocessable Content

423

Locked

424

Failed Dependency

425

Too Early

426

Upgrade Required

428

Precondition Required

429

Too Many Requests

431

Request Header Fields Too Large

451

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