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HTTP 402 Payment Required

The request requires payment — billing is not set up or a balance is exhausted.

4xx · Client error✗ not retryable — fix the request instead

In AI APIs specifically

OpenAI returns 402-style billing errors when quota is exhausted; Anthropic surfaces billing problems as 400/403 with billing messages. Check the billing console first.

Fix checklist

  • Add or update the payment method.
  • Check usage limits and remaining credits.
  • Set up billing alerts so this never surprises you again.

Spec: RFC reference

Related status codes

400 Bad Request

The server cannot process the request due to a client error — malformed JSON, invalid parameters, or schema violations..

401 Unauthorized

Authentication is missing or invalid for this request..

403 Forbidden

The server understood the request but refuses to authorize it — valid credentials, insufficient permission..

404 Not Found

The requested resource does not exist at this URL..

← All HTTP status codes