Api Testing Patterns
This is the pattern library you reach for when building API tests that actually prevent breaking changes in production. It covers consumer-driven contract testing with Pact, comprehensive REST and GraphQL validation, and the critical scenarios teams often miss: expired tokens, race conditions on shared resources, idempotency key handling. The quick reference table breaking down contract versus component versus integration testing is genuinely useful for figuring out what layer you should be testing at. Four coordinated agents will validate contracts against OpenAPI specs, generate test suites, run load tests, and scan for security issues. The code examples are production-ready, especially the concurrency test that verifies inventory doesn't oversell when hit with parallel requests.
- skills.sh installs
- 609
- GitHub stars
- 524
- last updated
- Aug 21, 2026
Install
$ npx -y skills add proffesor-for-testing/agentic-qe --skill api-testing-patterns --agent claude-codeInstalls into .claude/skills of the current project.
Files
API Testing Patterns
<default_to_action> When testing APIs or designing API test strategy:
- IDENTIFY testing level: contract, integration, or component
- TEST the contract, not implementation (consumer perspective)
- VALIDATE auth, input, errors, idempotency, concurrency
- AUTOMATE in CI/CD with schema validation
- MONITOR production APIs for contract drift
Quick Pattern Selection:
- Microservices → Consumer-driven contracts (Pact)
- REST APIs → CRUD + pagination + filtering tests
- GraphQL → Query validation + complexity limits
- External deps → Mock with component testing
- Performance → Load test critical endpoints
Critical Success Factors:
- APIs are contracts - test from consumer perspective
- Always test error scenarios, not just happy paths
- Version your API tests to prevent breaking changes </default_to_action>
Quick Reference Card
When to Use
- Testing REST or GraphQL APIs
- Validating microservice contracts
- Designing API test strategies
- Preventing breaking API changes
Sponsors
Agent CaffeineSponsoredClose your lid, come back to finished work
SnugSponsoredThe clipboard manager for the AI eraPromote your product hereReach 125k+ visitors monthly
WaxSponsoredBlock anything with supervision, without erasing your iPhonePromote your product hereReach 125k+ visitors monthly
knobsSponsoredSee your site on any phone, any day, in any languageDetails
- Repository
- github.com/proffesor-for-testing/agentic-qe
- Categories
- Backend & APIs, Testing & QA, AI & Agent Building
- First seen
- Jun 3, 2026
More from proffesor-for-testing/agentic-qe
All 13Recommended
More Backend & APIs
encore-go-authencoredev/skillsProtect Encore Go endpoints with authentication and authorize callers. Covers `auth.AuthHandler`, `auth.UserID`, the `Authorization` header, and `//encore:api a599skills.sh installs
database-schema-designaj-geddes/useful-ai-promptsDesign database schemas with normalization, relationships, and constraints. Use when creating new database schemas, designing tables, or planning data models fo597skills.sh installs
api-design-patternsbobmatnyc/claude-mpm-skillsComprehensive API design patterns covering REST, GraphQL, gRPC, versioning, authentication, and modern API best practices579skills.sh installs
pinme-authglitternetwork/pinmeUse when a PinMe project (Worker TypeScript) needs to integrate user authentication — creating email/password users, verifying id_tokens, querying user info, or511skills.sh installs
raindrop-apiintellectronica/agent-skillsThis skill provides comprehensive instructions for interacting with the Raindrop.io bookmarks service via its REST API using curl and jq. It covers authenticati507skills.sh installs
api-security-hardeningsecondsky/claude-skillsREST API security hardening with authentication, rate limiting, input validation, security headers. Use for production APIs, security audits, defense-in-depth, 506skills.sh installs