"An overview of REST (Representational State Transfer)" matching MCP connectors:

Point Gecko at an OpenAPI spec; get first-call-correct, auth-hidden agent tools.

Deploy production REST APIs from JSON schemas in seconds. Manage projects, schemas, and deployments.

Check an MCP endpoint resolves: liveness, live tool list, schema drift. Free.

JSONPlaceholder MCP — wraps JSONPlaceholder fake REST API (free, no auth)

Create hosted mock REST APIs as tools: seed fake data, import specs, query, write, snapshot. Free.

DummyJSON mock REST: products, users, posts, recipes, todos. Keyless test data.

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

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

Search millions of x402 APIs for data, finance, validation, security, inventory, sync and automation

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

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.

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

The Grafbase MCP server sits in front of a GraphQL API and exposes an MCP protocol-compliant interface that allows AI agents and LLMs to explore and query GraphQL APIs using natural language. It provides tools to search schemas, introspect types and fields, and execute GraphQL queries while minimizing context bloat by returning only relevant schema subsets, with built-in support for authentication, authorization, and configurable access control.