Api Testing Observability Api Mock

Need to spin up a mock API before your backend is ready or test against a third-party service without burning through rate limits? This skill helps you build realistic mock servers with proper error handling, state transitions, and configurable scenarios. It walks you through defining API contracts, auth flows, and latency simulation, then generates deterministic fixtures you can toggle between. Good for parallel frontend development or creating demo environments that actually behave like production. The approach is methodical: you define the contract first, then it builds the mock infrastructure with clear labels so nobody accidentally points production traffic at your fake endpoints.