Individual skill
performing-api-fuzzing-with-restler
Uses Microsoft RESTler to perform stateful REST API fuzzing: compiles an OpenAPI/Swagger spec into a RESTler grammar, configures authentication, and runs test/fuzz-lean/fuzz modes that generate request sequences exercising producer-consumer dependencies, then flags 500 errors, auth bypasses, resource leaks, and injection bugs. Use when fuzzing REST APIs for stateful bugs or running RESTler-based automated API security testing.
skills/performing-api-fuzzing-with-restler/SKILL.md
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- ai-agents Repository topic
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- penetration-testing Repository topic
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- api-security Declared skill tag
- fuzzing Declared skill tag
- restler Declared skill tag
- automated-testing Declared skill tag
- openapi Declared skill tag
- stateful-testing Declared skill tag
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Read excerpt
# Performing API Fuzzing with RESTler
## When to Use
- Performing automated security testing of REST APIs using their OpenAPI/Swagger specifications
- Discovering bugs that only manifest through specific sequences of API calls (stateful testing)
- Finding 500 Internal Server Error responses that indicate unhandled exceptions or crash conditions
- Testing API input validation by fuzzing parameters with malformed, boundary, and injection payloads
- Running continuous security regression testing in CI/CD pipelines for API changes
**Do not use** against production environments without explicit authorization and monitoring. RESTler creates and deletes resources aggressively during fuzzing.
## Prerequisites
- Written authorization specifying the target API and acceptable testing scope