When integrating with APIs, monitoring the HTTP status code from responses is essential. Below are the most frequent codes and how to address them.
400 – Bad Request
Meaning: The request could not be processed due to malformed syntax or invalid data.
Troubleshooting:
- Check that your request payload matches the API’s expected format.
- Inspect query parameters or JSON body for typos or missing fields.
401 – Unauthorized
Meaning: The server requires valid authentication credentials.
Troubleshooting:
- Confirm that your API key or authentication token is correct and included in the headers.
- Ensure tokens have not expired.
403 – Forbidden
Meaning: The server understood the request but refuses to authorize it.
Troubleshooting:
- Verify the account has sufficient permissions for the endpoint.
- Double-check IP or domain restrictions that might block your request.
- Look for usage limits that, when exceeded, can lead to 403 responses.
404 – Not Found
Meaning: The requested endpoint or resource does not exist.
Troubleshooting:
- Ensure the URL path and query parameters are correct.
- Check for typos in the route or endpoint name.
- If referencing an ID, verify the resource actually exists on the server.
500 – Internal Server Error
Meaning: A problem occurred on the server side while processing the request.
Troubleshooting:
- Examine server logs if you control the API.
- For third-party APIs, retry later or contact support with details.
- When developing with Flask, running the app with debug=True will show stack traces for easier debugging.
General Workflow Tips
- Log the Status Code – Always check response.status_code when making API calls. This helps narrow down the issue quickly.
- Validate Request Data – Use tools or code validation to ensure your outgoing data matches the API’s requirements.
- Use Environment Variables for Credentials – Store keys like WEBBULA_API_KEY in environment variables to keep them out of your codebase and avoid accidental exposure.
- Retry Logic – Implement retries for temporary failures (such as some 500 errors) but avoid hammering the server.
- Check API Documentation – Each API may return additional custom error codes. Refer to official documentation for specifics.
By systematically checking the status code and examining the request/response details, you can quickly diagnose most API issues.