Web API Testing Tool

The Web API Testing Tool provides a programmable workflow for crafting HTTP and GraphQL requests, executing them against an API, and collecting structured results for validation and benchmarking. Target users include API developers, QA engineers, and backend teams who require repeatable tests, contract checks, and performance signals without building bespoke scripts. When used during API design, integration testing, or before deployment, it helps verify endpoints, headers, payload handling, and auth behavior.
The domain capabilities include request templating, environment variable substitution, multiple auth schemes, request validation, response schema checks, content-type validation, performance measurement, and optional code generation. Required features: endpoint URL, HTTP method, headers, query params, body, and environment selection. Advanced features: OAuth2 flows, API key management, GraphQL support, rate-limiting simulation, JSON schema validation, multi-step test flows, and export of results or client snippets.
Inputs include endpoint URL (string), method (GET/POST/PUT/PATCH/DELETE), headers (map), query_params (map), body (string/JSON), auth_type (enum), credentials (string), environment (string), timeout_ms (int). Outputs include status_code (int), response_time_ms (int), response_headers (map), response_body (string), is_validated (bool), and errors (string list). Validation enforces required fields, URL validity, and JSON formatting when content-type is application/json.
The tool executes HTTP requests, measures latency with high-resolution timers, and applies assertions for status codes, headers, and body structure. JSON schema validation and JSONPath assertions are supported; environment variable precedence resolves in the order: explicit inputs > environment > defaults. Optional performance thresholds produce pass/fail decisions. Error handling covers invalid URLs, missing inputs, timeouts, and network failures, with diagnostic details and optional retries. The tool follows HTTP/1.1 semantics and RFC guidance, reports times in milliseconds, and supports UTC logs with auditability for regional compliance. It assumes network access and is not a gateway or proxy, nor does it persist user data by default.