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How do APIs handle 401 Unauthorized Errors?

APIs send a 401 Unauthorized Error when a wrong request (e.g., expired or missing token/API keys) does not have proper authentication. Corrective handling includes:

  • Transmission of the WWW-Authenticate headers
  • Refuting unproven requests
  • Delivery of good error messages

When developing, it is important to include valid credentials; otherwise, there are 401 Errors in the API response.