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HTTP

Understand HTTP status codes fast

Map common 4xx/5xx responses to actionable fixes.

When to use which codes

Pick status codes that reflect the actual outcome: 200/201 for success, 400 for bad input, 401/403 for auth.

Step-by-step

Identify the failing request, inspect headers, then map the response to the correct status code.

Operational tips

Log the response class and add monitoring for error spikes.

Checklist

  • •Use accurate status codes.
  • •Log errors consistently.
  • •Monitor 5xx spikes.
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