# Third-Party Integration Testing

## Catch API contract drift before users report them

Test your third-party integrations and catch bugs caused by upstream external API changes with AI-powered observability

## Comparison

### Testing your external integrations

**Before**  
Without Tusk  
• Hit live endpoints (slow, expensive)  
• Manual mocking that can be brittle  
• Can't test when API is down  
• Miss errors from upstream changes  
• Rate limits block CI/CD

**After**  
With Tusk  
• Zero external calls in tests  
• Mocks auto-created and maintained  
• Test integrations entirely offline  
• Chat with AI to detect drift early  
• Unlimited test runs

## Trace your app on staging or production

In 10 lines of code, initialize the Tusk Drift SDK to capture full traces as users interact with your app in the environment of your choosing

## Debug errors with full request context

Go beyond Sentry-level observability––drill down into individual spans to see request and response bodies after replaying traces related to third-party integrations

## Create alerts for when external APIs change

Chat with the AI Trace Assistant to set up error alerts, analyze degrading performance, and monitor your request flows

## Stop burning money and time testing integrations

[Try free today ](https://app.usetusk.ai/app)

### Helpful resources about AI automated testing

[Does Real API Traffic Make AI-Generated Tests Better? An A/B Evaluation of Tusk Drift](/content/resources/real-api-traffic-ai-generated-tests-evaluation/index.html)  
March 9, 2026

[Scaling Parallel Agents with the Context-Verification-Harness Framework](/content/resources/scaling-parallel-coding-agents-cvh-framework/index.html)  
March 8, 2026

[What if Your Production Traffic Was Your Test Suite?](/content/resources/what-if-your-production-traffic-was-your-test-suite/index.html)  
February 11, 2026

[How Promptfoo Scaled Test Coverage Without Slowing Development](/content/resources/how-promptfoo-scaled-test-coverage-with-tusk/index.html)  
February 2, 2026