DP
DevPipe

In the same workflow: Webhook Tester and API Response Analyzer.

API Error Code Analyzer

Enter one or more HTTP status codes (comma-separated) to see meaning and suggested action.

400Bad Request

Request is invalid or malformed (e.g. wrong JSON, missing field).

Suggested action: Fix URL, headers, or body; check API docs.

401Unauthorized

Authentication required or credentials invalid.

Suggested action: Send valid token (Bearer, API key) or re-authenticate.

429Too Many Requests

Rate limit exceeded.

Suggested action: Back off; use Retry-After if present; reduce request rate.

500Internal Server Error

Server-side failure.

Suggested action: Retry with backoff; if persistent, contact provider.

Related tools

Why use API Error Code Analyzer?

HTTP error codes are shorthand for long stories. Look up common 4xx and 5xx meanings, typical causes, and next debugging steps so on-call engineers share vocabulary with API vendors faster.

Practical tips

  • Read response bodies—many APIs embed machine-readable error codes alongside HTTP status.
  • Differentiate client bugs (4xx) from server incidents (5xx) before paging infra.
  • Log request hashes when vendors ask for reproduction details.

Common questions

Does this list every possible code?
It focuses on common API-related statuses. Niche protocols may need spec-specific references.
Why does my API return 200 with errors?
Some stacks encode failure in JSON bodies. Treat that as a contract smell and monitor explicitly.

About

HTTP error code lookup: status code meaning, suggested action. 4xx, 5xx explained. Free API error guide.

Related tools

Used together

Next step

After api-error-code-analyzer, continue with Webhook Tester to validate the next API or webhook layer.