api-tester
api-tester MCP server executes HTTP requests to API endpoints and inspects responses including status codes, headers, and payloads. It enables assertion checks for validation. Developers and QA engineers apply it to debug integrations, run smoke tests, and explore API behavior.
Overview
api-tester is an MCP server for testing web APIs through tool calls in Model Context Protocol environments. It sends requests to endpoints, retrieves full response details, and supports basic validation, allowing programmatic API verification without standalone tools like Postman or curl.
Key Capabilities
No specific tools are listed, but the server handles core API testing functions:
- HTTP request execution (GET, POST, PUT, DELETE, PATCH) with custom headers, query params, and bodies.
- Response inspection: status codes, timings, headers, and raw/JSON-parsed bodies.
- Simple assertions for status matching, content presence, and schema basics.
Use Cases
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Endpoint Validation: Send a POST to /api/users with JSON payload and confirm 201 status plus user ID in response.
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Integration Debugging: Test third-party API calls in AI agent workflows, e.g., verify auth token handling and error responses.
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Pre-Deployment Checks: Run GET on health endpoints (/health) to ensure API uptime before releases.
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Schema Testing: POST data to GraphQL endpoints and check if response matches expected fields.
Who This Is For
- Backend developers testing REST/GraphQL services.
- QA automation specialists scripting API tests.
- AI/ML engineers validating external API tools in LLM chains.
- DevOps for API monitoring in pipelines.