Git diff for your API responses.
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Updated
Aug 12, 2026 - Go
Git diff for your API responses.
Catch breaking OpenAPI/REST API changes in CI before they reach production
Local dashboard UI demo with a Python JSON API and contract tests
Automated OpenAPI contract fuzzer and boundary testing suite generating mutation test cases in pure PHP
CI-friendly OpenAPI breaking-change detector for versioned API contracts, with local diffs and machine-readable results.
AI-powered API contract monitoring that detects breaking changes, traces affected code references, and proposes evidence-backed fixes.
Declarative API contract test harness for Stellar backends — one YAML file locks error envelopes, auth boundaries, and status code contracts across releases. Python + Rust ports with a CI parity gate.
Specmatic — independent third-party profile of a public API surface, by API Evangelist. Specmatic is an AI-powered, no-code platform for API contract testing, service virtualization, and governance. It transforms API specifications (OpenAPI, AsyncAPI, gRPC, GraphQL, WSDL) into executable contracts for contract-driven development, enabling teams to
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