Showcase

Real workflows. Real debugging.

From API development to security auditing—see how developers use Trace for debugging, testing, and analysis.

Use cases

API development & testing

Debug API integrations in real-time. Inspect request/response payloads, validate headers, and test against staging environments.

Validate API response structure
Test authentication flows
Debug error responses

WebSocket debugging

Capture and analyze real-time communication. Frame-by-frame inspection with timestamps and full payload visibility.

Debug chat applications
Analyze live data streams
Validate message ordering

Performance analysis

Identify slow requests, optimize payload sizes, and analyze timing breakdowns for DNS, TLS, and data transfer.

Find performance bottlenecks
Optimize request timing
Reduce payload sizes

Security auditing

Verify TLS configurations, check for sensitive data leaks, and validate certificate pinning implementations.

Audit TLS security
Detect data leaks
Verify certificate pinning

CI/CD integration

Automate network testing in CI pipelines. Export HAR files for regression testing and validate API contracts.

Automated API testing
Regression testing
Contract validation

Request modification

Mock API responses, test error conditions, and redirect traffic to staging servers without modifying app code.

Mock API responses
Test error handling
Environment switching

Configuration examples

Rewrite Rule

Add custom headers to all API requests

Automatically inject authorization headers or feature flags into requests matching a pattern.

json

{
  "name": "Add Auth Header",
  "enabled": true,
  "pattern": "api.example.com/*",
  "action": "modify-request",
  "modifications": {
    "headers": {
      "Authorization": "Bearer YOUR_TOKEN_HERE",
      "X-Feature-Flag": "new-ui-enabled"
    }
  }
}

Request Map

Mock API response for offline testing

Return a static JSON response without hitting the real API, perfect for testing error states.

json

{
  "name": "Mock User Profile",
  "enabled": true,
  "pattern": "api.example.com/user/profile",
  "response": {
    "status": 200,
    "headers": { "Content-Type": "application/json" },
    "body": {
      "id": "12345",
      "name": "Test User",
      "email": "test@example.com"
    }
  }
}

Host Override

Redirect production API to staging

Test against staging servers without modifying your app's configuration.

json

{
  "hosts": {
    "api.example.com": "staging-api.example.com",
    "cdn.example.com": "staging-cdn.example.com"
  }
}

Filter Preset

Show only failed API requests

Quickly filter for errors and warnings to focus on what needs fixing.

json

{
  "name": "Errors Only",
  "filters": [
    { "field": "status_code", "operator": ">=", "value": 400 },
    { "field": "domain", "operator": "contains", "value": "api.example.com" }
  ]
}

Share your use case

Found a creative way to use Trace? Share it with the community in GitHub Discussions.

Share your workflow Browse documentation