How to troubleshoot common API errors

What this guide covers

Use status families, request IDs, validation details, and controlled retries to diagnose integration failures. Work through each step in order, preserve safe reference details, and stop before repeating an action if the original result is still unclear.

Step-by-step

1. Capture the HTTP method, safe URL path, status code, request ID, timestamp, and redacted response body.
2. Verify environment, authentication format, content type, and required fields against the approved documentation.
3. Treat validation failures as request problems; correct the payload rather than retrying unchanged.
4. Use bounded exponential backoff for retryable server or rate-limit responses, and honor retry guidance when provided.
5. Use an idempotency strategy for retried write operations so a network timeout does not create duplicates.

Troubleshooting

• No response can indicate DNS, TLS, firewall, timeout, or connectivity problems rather than an API status.
• Intermittent 5xx responses should be correlated by request ID and time before escalation.
• Consistent 4xx responses usually require a credential, permission, path, or payload correction.

If the result changes after a check, record what changed and the exact time. That detail is often more useful than repeating every step.

Before contacting support

Prepare the smallest set of information needed to explain the issue. Redact passwords, one-time codes, API keys, authorization headers, CVVs, full card numbers, and full bank account details.

• Request ID and UTC timestamp
• Redacted request and response
• Language, library, and environment

State the expected outcome, observed outcome, current impact, and whether the issue is ongoing or intermittent.