A server for conducting detailed web searches with citations MCP Connectors

TestMCP.dev A

Free platform to test MCP clients without installing anything. Create mock tools with dynamic templates, configurable delays, conditions (if/then), and response sequences. Supports JSON-RPC 2.0 over Streamable HTTP. Built-in text_echo and json_echo tools. Rate-limited tiers: anonymous (5 calls/min, 1 mock tool), registered (10 calls/min, 4 mock tools), premium (60 calls/min, unlimited). Zero setup — no install, no registration required. More info: https://www.testmcp.dev

API Testing Testing & QA Tools

21

validate A

Deterministic validation for AI-generated artifacts: JSON Schema, OpenAPI response, SQL syntax.

API Testing Testing & QA Tools

11

Apiosk A

AI-native payments: discover, pay for, execute, and publish monetized APIs through MCP.

Developer Tools Payments & Billing API Testing

101

api-schema-drift-detector A

Cloudflare Workers MCP server: api-schema-drift-detector

API Testing Developer Tools

31

interactive-api-playground A

Cloudflare Workers MCP server: interactive-api-playground

Developer Tools API Testing Cloud Platforms

51

api-payload-auditor A

Cloudflare Workers MCP server: api-payload-auditor

Security API Testing

41

api-diff-monitor A

Cloudflare Workers MCP server: api-diff-monitor

API Testing Monitoring

61

api-contract-validator A

Cloudflare Workers MCP server: api-contract-validator

API Testing Developer Tools

51

api-mock-server A

Cloudflare Workers MCP server: api-mock-server

API Testing Developer Tools

61

Bitrix MCP A

MCP server that delivers up-to-date Bitrix24 REST API documentation.

Documentation Access API Testing Developer Tools

52

dilli-email-validation-api-server C

An MCP server that provides tools to validate an email address using Dilli Email Validation API.

Developer Tools API Testing

11

Petstore MCP Server C

Swagger Petstore API (v1.0.27) as MCP for testing and prototyping powered by the HAPI MCP server

API Testing Developer Tools

1917

A2ABench B

Public benchmark where agents submit Q&A answers and get scored on a leaderboard.

Developer Tools API Testing Search

11

OpenAPI.city

MCP server and REST API for querying OpenAPI specs. Endpoint-level extraction, schema resolution, 100+ APIs indexed.

API Testing Documentation Access Developer Tools

1

Fixzi — MCP & API Schema Drift Monitor

Monitor MCP servers, API contracts and AI outputs for schema drift. Alerts on breaking changes.

API Testing Monitoring

1

Simceptor

Simceptor is an AI-native Mock API simulation platform with a built-in MCP server. It enables AI agents to create, inspect, update, and test dynamic mock APIs, conditional response rules, stateful session simulations, and network latency directly from context.

API Testing Developer Tools

1

simceptor

AI-native mock API server with MCP. Create REST/SOAP mocks from Claude, Cursor, or Windsurf.

API Testing Testing & QA Tools

1

postman-mcp-server

A basic MCP server to operate on the Postman API.

API Testing Developer Tools App Automation

2282

api-governance

API governance for AI agents. Detects breaking changes, scores blast radius, blocks unsafe calls.