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API Error Response Analyzer

Analyze API error responses for quality and information leakage.

Uses one safe GET request and analyzes the returned response.

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What is API Error Response Analyzer?

API Error Response Analyzer inspects the response returned by a public endpoint and looks for common information-leak patterns that can appear in error or debug output.

What this tool checks

  • Stack trace and exception indicators
  • Database error patterns
  • Internal filesystem paths
  • Debug-mode indicators
  • Potential credential labels
  • Private IP address exposure
  • Debug response headers
  • Technology disclosure headers

How to use it

  1. Enter an API endpoint that returns the response you want to review.
  2. Run the analyzer.
  3. Review detected information-leak patterns.
  4. Remove unnecessary sensitive implementation details from production responses.
Important: Pattern matching can produce false positives and cannot prove that a value is actually a credential or exploitable secret. Findings should be manually reviewed.

Frequently asked questions

Does this intentionally trigger application errors?

No. It analyzes the response produced by the URL you provide.

Can it detect every secret?

No. It looks for a limited set of observable patterns and disclosure signals.

Related API tools

⚡ Quick API Audit Run multiple API health and security checks from one URL. 🔒 API Security Headers Checker Analyze security-related HTTP response headers. 🔌 API Endpoint Tester Send requests and inspect status, headers, JSON and timing. 🌐 CORS Security Checker Inspect cross-origin response and preflight behavior. ⏱️ API Rate Limit Checker Inspect rate-limit responses and headers with safe request caps. 🔑 API Authentication Exposure Checker Observe how an endpoint behaves without credentials.