4xx Client Error

HTTP 415 Unsupported Media Type

The media format of the requested data is not supported by the server, so the server is rejecting the request. The Content-Type or Content-Encoding of the request is not supported.

Common Causes

  • Sending JSON when the server expects form data
  • Missing or incorrect Content-Type header
  • Uploading a file format the server doesn't accept
  • Sending XML to a JSON-only API endpoint

How to Fix

  1. 1Set the correct Content-Type header (e.g., application/json)
  2. 2Check API documentation for accepted media types
  3. 3Convert data to a supported format before sending

Example

HTTP 415 Unsupported Media Type
POST /api/data HTTP/1.1
Content-Type: text/plain

→ 415 Unsupported Media Type
→ "Expected application/json"

Related Client Error Codes

400

Bad Request

401

Unauthorized

402

Payment Required

403

Forbidden

404

Not Found

405

Method Not Allowed

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

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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