A curated list of developer tools, SDKs, libraries, utilities, and resources for working with Model Context Protocol (MCP) servers.

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Software Development Kits for MCP server development.

• FastMCP 📇 - A high-level framework for building MCP servers in TypeScript
• QuantGeekDev/mcp-framework 📇 - Fast and elegant TypeScript framework for building MCP servers
• wong2/LiteMCP 📇 - A high-level framework for building MCP servers in JavaScript/TypeScript
• ModelFetch 📇 - A runtime-agnostic SDK to create and deploy MCP servers anywhere TypeScript/JavaScript runs
• ribeirogab/simple-mcp 📇 - A simple TypeScript library for creating MCP servers
• firebase/genkit#mcp 📇 – Provides integration between Genkit and the Model Context Protocol (MCP)
• MCPcat 📇 - User analytics, session tracking, and live debugging for MCPs
• Mastra AI 📇 - Mastra is a Typescript-based AI agent framework that can be used to author MCP servers.
• FrontMCP 📇 — A TypeScript-first framework for building extensible MCP servers with decorators, dependency injection, and modular architecture.
• NeuroLink 📇 - TypeScript-first multi-provider AI SDK from Juspay with built-in MCP client support, 13 major AI providers and 100+ models, streaming, tool calling, and production-grade agent orchestration.

• FastMCP 🐍 - A high-level framework for building MCP servers in Python
• mcp-use 🐍 - Open source python library to very easily connect any LLM to any MCP server both locally and remotely.
• langchain-mcp 🐍 - Provides MCP tool calling support in LangChain
• lc2mcp 🐍 - Convert LangChain tools to FastMCP tools with one line of code, supports context injection and 1000+ langchain-community tools
• tadata-org/fastapi_mcp 🐍 - Provides MCP wrapping on top of existing FastAPI REST endpoints
• easymcp 🐍 - A high level asyncio native client SDK with native support for namespaced servers and caching.
• mcp-cli 🐍 - A lightweight CLI MCP client to connect with remote MCP servers.
• MCPcat 🐍 - User analytics, session tracking, and live debugging for MCPs
• basementstudio/xmcp 🐍 - Open-source framework for building secure, testable, enterprise-grade MCP tools from SQL or Python on top of dbt + DuckDB.
• claw-army/claude-node 🐍 - Python subprocess bridge for Claude Code CLI, giving Python code direct access to Claude Code native capabilities via stream-json.

• quarkus-mcp-server ☕ - Java SDK for building MCP servers using Quarkus
• spring-ai-mcp ☕ - Java SDK and Spring Framework integration for building MCP client and MCP servers
• tinystruct-mcp ☕ - Java SDK and establishing an extensible MCP server based on lightweight tinystruct framework

• ggoodman/mcp-server-go 🏎️ - Build MCP servers that scale from a 20‑line stdio prototype to a horizontally scaled, OIDC‑protected streaming HTTP deployment — without rewriting business logic.
• mark3labs/mcp-go 🏎️ - Golang SDK for building MCP Servers and Clients
• metoro-io/mcp-golang 🏎️ - Golang framework for building MCP Servers, focussed on type safety
• strowk/foxy-contexts 🏎️ - Golang library to write MCP Servers declaratively with functional testing included

• linux-china/mcp-rs-template 🦀 - MCP CLI server template for Rust
• Epistates/TurboMCP 🦀 - TurboMCP SDK: Enterprise MCP SDK
• poem-web/poem#poem-mcpserver 🦀 - MCP Server implementation for Poem

• http4k MCP SDK 🔶 - Functional, testable Kotlin SDK based around the popular http4k Web toolkit

• salty-flower/ModelContextProtocol.NET #️⃣ - A C# SDK for building MCP servers on .NET 9 with NativeAOT compatibility ⚡ 🔌

• mullerhai/sakura-mcp 〽️ - Scala MCP Framework for Building effective agents with MCP servers and clients

• leehack/mcp_dart 🎯 - This library aims to provide a simple and intuitive way to implement MCP servers and clients in Dart

• modelcontextprotocol/ruby-sdk 💎 🎖️ - Official Ruby SDK for building MCP servers
• tidewave-ai/tidewave_rails 💎 - Ruby on Rails MCP, speed up development with AI assistants that understand your web application, how it runs, and what it delivers

• tidewave-ai/tidewave_phoenix 💧 - Phoenix MCP, speed up development with AI assistants that understand your web application, how it runs, and what it delivers

• micl2e2/mcpc 🌊 - Modern C SDK for building MCP servers/clients.

• modelcontextprotocol/swift-sdk 🍎 🎖️ - Official Swift SDK for building with MCP.

• yaniv-golan/mcp-bash-framework 👾 - Zero-dependency Bash implementation for building MCP servers, supporting features like tool handling, schema validation, progress streaming, and cross-platform compatibility.

• jsulmont/mcp-lisp λ - Common Lisp SDK for building MCP servers and clients with HTTP and stdio transports

High-level frameworks for working with MCP servers

• cordum-io/cordum 🏎️ – Native MCP server from a safety-first agent orchestration platform. Supports stdio + HTTP/SSE transports with 6 tools (job submission, policy evaluation, output scanning, workflow triggering, audit queries, pool status) and 7 resources.
• hasmcp/hasmcp-ce 🤖📇🏎️ - Convert your API to MCP server with built-in authentication, authorization, real-time request/response logs and metrics. HasMCP is a no-code, self-hosted API to MCP server bridge.
• lastmile-ai/mcp-agent 🤖 🔌 - Build effective agents with MCP servers using simple, composable patterns
• jcasare/mcp-craft 📇 - CLI toolkit for scaffolding, testing, and registering MCP servers across Claude, Cursor, VS Code, Codex, and Gemini
• mcpdotdirect/template-mcp-server 📇 - A CLI tool to create a new MCP server project with TypeScript support
• p-funk/FEGIS 🐍 - A semantic programming framework for LLMs that compiles YAML archetypes into structured tools with built-in memory and meaning. Each interaction becomes part of an emergent knowledge graph, enabling persistent, semantic retrieval and reuse.
• portel-dev/photon 📇 - Runtime and marketplace for MCP servers using single-file TypeScript format. Like npm + Node.js for MCP - fork-first design with 16+ production-ready photons.
• sebastianbuzdugan/framework-rai-mcp 📇 - A responsible AI MCP server framework focused on ethical deployment in startups and enterprise prototypes.
• sendaifun/solana-agent-kit#agent-kit-mcp-server - Solana MCP SDK
• stephencme/create-mcp-ts 📇 - Create a new MCP server in TypeScript, batteries included - supports user-defined templates!
• Upsonic/gpt-computer-assistant 🐍 – Framework to build vertical AI agent
• microsoft/semantic-kernel 🐍 #️⃣ – Enterprise-ready orchestration framework MCP compatible from Microsoft to build intelligent AI agents and multi-agent systems.
• dhyansraj/mcp-mesh 🐍 📇 - Distributed orchestration framework for MCP servers with automatic discovery, dependency injection, and Kubernetes-native scaling
• xmcp 📇 - A TypeScript framework with file-system routing & complete toolkit
• Kryfto 📇 - Open-source web-browsing backend for AI agents with a 42-tool MCP server for Claude Code/Cursor/Codex, REST API for n8n/Zapier/Make, federated multi-engine search, and enterprise infrastructure

Tools for testing MCP servers and clients

• AgentTrust 🐍 - Quality verification service for MCP servers. Automated challenge-response testing with LLM judge consensus, adversarial probes, and IRT adaptive question calibration.
• mclenhard/mcp-evals 🤖 - Package and Github action for running evals.
• mcpjam/inspector - Testing and debugging MCP servers.
• modelcontextprotocol/inspector 📇 🎖️ - UI for testing MCP servers.
• wong2/mcp-cli 🤖 - Command line inspector for manual testing
• muppet-kit/inspector - MCP Inspector with AI-assisted debugging and testing capabilities.
• loopwork-ai/Companion - Companion is a utility for testing and debugging your MCP servers on macOS, iOS, and visionOS.
• MCPLoadTester — JMeter sampler for load testing Model Context Protocol (MCP) servers over stdio, HTTP, and SSE.
• garagon/aguara 🏎️ - Static security scanner for MCP servers and AI agent skills. 173 detection rules, prompt injection, credential leaks, taint tracking. Scans configs and tool descriptions before deployment.
• greynewell/mcpbr 🐍 - Benchmark runner for evaluating MCP server performance and agentic capabilities.
• Typewise/mcp-chaos-rig 📇 - A local MCP server that breaks on demand. Test your client against auth failures, disappearing tools, flaky responses, and token expiry, all from a web UI.
• iris-eval/mcp-server - MCP-native eval & observability. 12 built-in eval rules, trace logging, cost tracking. Agents discover it automatically — zero code changes.
• realwigu/mcp-doctor 📇 - Zero-config CLI that auto-discovers MCP configs across Claude Code, Cursor, VS Code, Windsurf, and Claude Desktop. Tests connections via JSON-RPC handshake, audits for security issues, and benchmarks latency.
• xkumakichi/veridict 📇 - Runtime trust scoring middleware for MCP servers. Logs tool executions, classifies failures (timeout/error/validation), applies time-decay weighting, and produces a trust verdict (yes/caution/no).
• KryptosAI/mcp-observatory 📇 - CLI + MCP server for testing MCP servers. Health scoring (0-100), schema quality audits, protocol conformance checks, JUnit/SARIF CI output, and badge generation. Works as both a CLI tool and an MCP server that AI agents can use to test other servers.

Resources for testing MCP servers with authentication and authorization

• NapthaAI/http-oauth-mcp-server 📇 - Example implementation of a remote MCP server with OAuth authentication
• modelcontextprotocol/python-sdk 🐍 🎖️ - Example authenticated SSE server in the official Python SDK

Public test endpoints:

• Asana MCP Server - Production SSE endpoint for testing OAuth flows
• Sentry MCP Server - Production SSE endpoint for testing OAuth flows
• Atlassian MCP Server - Production SSE endpoint for testing OAuth flows (requires allowlisting)

Reusable code libraries and components for MCP servers

• cnap-tech/codemode 📇 - Programmatic tool calling (Code Mode) for MCP — turn any OpenAPI spec into two sandboxed tools (search + execute) instead of hundreds of hand-written tools
• marimo-team/codemirror-mcp 📇 - CodeMirror extension that implements MCP for resource mentions and prompt commands
• jhgaylor/express-mcp-handlder 📇 - Bind an MCP server to an express server using the StreamableHTTP Transport
• JoshuaSiraj/mcp_auto_register 🐍 – Tool to automate the registration of functions and classes from a Python package into a FastMCP instance
• isaacwasserman/mcp-langchain-ts-client 📇 – Use MCP provided tools in LangChain.js
• traceloop/openllmetry#opentelemetry-instrumentation-mcp 🐍 - OpenTelemetry instrumentation for MCP Python that captures tool calls, notifications, listing, initialization handshakes and propagates traces from client to server.
• olgasafonova/mcp-otel-go 🏎️ - OpenTelemetry instrumentation for Go MCP servers using the official go-sdk. One middleware call adds tracing and metrics for every method, following the OTel semantic conventions for MCP.
• DenisTheM/monapi 📇 - Add per-tool x402 micropayments to any MCP server. Agents pay in USDC per tool call — no API keys, no signup. Also supports Express and Next.js.

Useful tools for debugging, proxying, testing, and working with MCP servers

• adiom-data/grpcmcp 🏎️ - A MCP Server that allows access to gRPC API services.
• boilingdata/mcp-server-and-gw 📇 - An MCP stdio to HTTP SSE transport gateway
• emicklei/mcp-log-proxy 🏎️ - An MCP proxy server that offers a Web UI to see the complete message flow.
• EvalsOne/MCP-Connect 📇 - A tiny tool that enables cloud-based AI services to access local Stdio based MCP servers via HTTP/HTTPS
• fangyinc/mcpport 🐍 - A lightweight gateway & registry for MCP servers with NAT traversal support, allowing edge devices to provide MCP services across networks. Features include WebSocket/SSE/HTTP endpoints, authentication, IPv6 support, and a CLI tool for easy registration of stdio-based MCP servers.
• hamidra/yamcp 📇 - An MCP workspace manager to bundle and manage MCP servers in dedicated local workspaces (e.g., for coding, design, research).
• lightconetech/mcp-gateway 📇 - A gateway demo for MCP SSE Server
• mcpjungle/MCPJungle 🌳 - Self-hosted MCP Registry and Proxy for ai agents
• mcpproxy-go 🏎️ - Production-ready MCP proxy with BM25 tool filtering, quarantine security, activity logging, and web UI for routing multiple MCP servers through a single endpoint.
• multi-mcp 🐍 - A flexible and dynamic Multi-MCP Proxy Server that acts as a single MCP server while connecting to and routing between multiple backend MCP servers over STDIO or SSE. Deployable on Kubernetes by exposing a single port, and supports dynamic addition and removal of MCP servers at runtime.
• MCPProxy 🏎️ - Smart MCP proxy with BM25 tool discovery, quarantine security, Docker isolation, and web UI
• punkpeye/mcp-proxy 📇 - A TypeScript SSE proxy for MCP servers that use stdio transport
• SecretiveShell/MCP-Bridge 🐍 – An openAI middleware proxy to use MCP in any existing openAI compatible client
• sidclawhq/platform 📇 – A governance proxy for MCP servers that adds policy-based access control, human approval workflows, and hash-chain audit trails. Wraps any upstream MCP server with zero code changes via .mcp.json configuration.
• sparfenyuk/mcp-proxy 🐍 – An MCP stdio to SSE transport gateway
• TBXark/mcp-proxy 🏎️ - An MCP proxy server that aggregates multiple MCP resource servers through a single HTTP server
• aakashh242/remote-mcp-adapter 🐍 - An MCP gateway that fixes the "remote filesystem" problem: client sent files become staged uploads, server generated files become fetchable MCP resources.

• koriyoshi2041/agentify 📇 - Transform any OpenAPI spec into 9 agent interface formats (MCP server, AGENTS.md, CLAUDE.md, Skills, and more) with a single command.
• inercia/mcpshell 🏎️ - Use shell scripts as MCP tools.
• ithena-one/ithena-cli 🏎️ - Wraps MCP commands to log interactions locally, facilitating debugging and interaction audits. Optional cloud.
• f/MCPTools 🏎️ - A command-line development tool for inspecting and interacting with MCP servers
• flux159/mcp-chat 📇 - A CLI based client to chat and connect with any MCP server
• mark3labs/mcphost 🏎️ - A CLI host application that enables LLMs to interact with external tools through MCP
• rodaddy/mcp2cli 📇 - CLI bridge that wraps MCP servers as bash-invokable commands, recovering ~11K tokens of context window per session
• strowk/mcp-autotest 🏎️ - A command-line tool for running YAML based language-agnostic autotests
• strowk/synf 🦀 - Tool to hot-reload MCP server on changes to saved files
• strowk/mcptee 🏎️ - Tool to proxy MCP and log inputs and outputs to YAML file
• ToolHive 🏎️ - ToolHive (thv) is a lightweight utility designed to simplify the deployment and management of MCP (Model Context Protocol) servers, ensuring ease of use, consistency, and security.
• onUI 📇 - Browser extension and MCP server for annotation-first UI pair programming with AI agents. Annotate, draw, and capture UI context from any webpage. 8 MCP tools. Claude Code, Cursor, Windsurf compatible.
• StacklokLabs/toolhive 🏎️ - A lightweight utility designed to simplify the deployment and management of MCP servers, ensuring ease of use, consistency, and security through containerization
• addozhang/spring-rest-to-mcp 🏎️ - An OpenRewrite recipe collection that automatically converts Spring Web REST APIs to Spring AI Model Context Protocol (MCP) server tools.
• taskade/mcp 📇 - Generate MCP tools from OpenAPI schemas. Supports auto-linking, response normalization, and MCP server integration.
• type-mcp/mcp-anything 🐍 - Auto-generates MCP servers from any codebase or API spec (FastAPI, Flask, Spring Boot, Express, Go, Rails, OpenAPI, GraphQL, gRPC) in one command.
• Writbase/writbase 📇 - MCP-native task management system for AI agent fleets with multi-agent permissions and inter-agent delegation.

Libraries & platforms for hosting MCP servers.

• Glama – offers hosting of open-source MCP servers, enabling developers and enterprises to easily discover build, manage MCP servers.
• Smithery - cloud hosting MCP servers as a service via docker containers
• vitorbari/mcp-operator - Kubernetes operator for MCP servers with automatic protocol validation, horizontal scaling, and built-in observability.

Example code ready to be made into a component of an MCP system.

• fastmcp-boilerplate 📇 – A simple MCP server built using FastMCP, TypeScript, ESLint, and Prettier.
• dart-mcp-server-template 🎯 - A template repository for creating Dart MCP servers. Provides a starting point with Docker configuration, http+stdio transport bindings, and a standard Dart project structure
• rails-mcp-startup-boilerplate 💎 - A Rails template for creating Paid MCP servers compatible with Claude Integrations. It uses Rails 8.0.2, Devise, Doorkeeper, FastMCP and Stripe. Has a built-in UI.

Documentation, guides, standards, and learning materials for Model Context Protocol and MCP server development.

• Model Context Protocol Specification — Official MCP specification
• Model Context Protocol (MCP) Quickstart

• Setup Claude Desktop App to Use a SQLite Database
• amirshk/mcp-secrets-plugin 🐍 - A reference code to securely store and retrieve sensitive information using the system's native keychain
• AI Agents for beginners by Microsoft 🐍 #️⃣ Full Course (Lessons 1–10) using Semantic Kernel – Theoretical and practical content (1 hour)

• awesome-mcp-servers
• awesome-mcp-clients