Best LangGraph MCP Servers
LangGraph is a library for building stateful, multi-actor applications with LLMs. It extends LangChain with a flexible graph system to coordinate agent workflows.
Why this server?
Supports LangGraph's create_react_agent interface for building reactive agents that can interact with Razz gaming tools and make real-time wagering decisions.
AsecurityAlicenseAqualityPlay provably fair games with real SOL wagering for any AI agentLast updated 2 days ago57MITWhy this server?
Enables LangGraph workflows to incorporate safety tools for monitoring user messages and managing high-risk escalations.
AsecurityAlicenseAqualityIt's a safety middleware that can detect and intercept self-harm and criminal intent at 3 stages. It allows developers of chat-based platforms to configure webhook notifications and store encrypted information for prior mitigation of any such cases.Last updated 6 days ago31Apache 2.0Why this server?
Provides governance for LangGraph agents, enabling identity-based permissions and human approval for high-risk actions.
AsecurityAlicenseAqualityGovernance proxy for MCP servers. Wraps any MCP server with policy evaluation, human approval workflows, and hash-chain audit trails. Supports stdio and Streamable HTTP transports.Last updated 3 days ago174Apache 2.0Why this server?
Provides search capabilities for LangGraph documentation for building complex LLM applications
AsecurityAlicense-qualityA Model Context Protocol server that enables intelligent searching across documentation for 30+ programming libraries and frameworks, fetching relevant information from official sources.Last updated 14 days ago238MITWhy this server?
Signs tool calls in LangGraph workflows using LangChain's callback system, allowing cryptographic verification of state graph executions and agent interactions.
AsecurityAlicense-qualityOpen-source MCP server that exposes Signet cryptographic tools over stdio. It provides tools to generate Ed25519 keypairs, sign MCP actions, verify Signet receipts, and compute canonical content hashes for AI agent audit and accountability workflows.Last updated 15 hours ago427Apache 2.0Why this server?
Supports building complex AI agents in LangGraph by providing specialized tools for document analysis and data transformation.
AsecurityFlicenseAqualityAgent Toolbelt is an MCP server exposing 11 focused API tools for LLM agents — schema generation, text extraction, token counting, CSV conversion, Markdown conversion, URL metadata, regex builder, cron expressions, address normalization, color palettes, and brand kits. Each tool is a focused microservice with structured input/output, WCAG-scored color data, USPS address parsing, and multi-model toLast updated 11 days ago2524Why this server?
Mentioned as an example project that can be accessed through the GitMCP service, specifically through the GitHub Pages integration.
Why this server?
Facilitates execution trace visualization and behavioral diffing for stateful LangGraph agentic workflows.
AsecurityAlicense-qualityMCP server that lets coding agents test AI agents. Create YAML test cases, snapshot golden baselines, check for regressions, and generate visual reports all from inside Claude Code or any MCP-compatible tool. Works with LangGraph, CrewAI, OpenAI, Claude, Mistral, and any HTTP API.Last updated 6 hours ago812980Apache 2.0Why this server?
Enables the construction of stateful research agents in LangGraph that can systematically validate trading strategies and perform multi-step market analysis.
AsecurityAlicense-qualityFrom idea to edge. Everyone has unique opinions and views of the world. Varrd makes it possible for everyone regardless of statistical, coding, or market knowledge to be able to find their unique edge. The issue with LLMs testing for edges in the market is redundant idea loops, overfit with confidence, and waste days exploring nonsense. Varrd is the infrastructure and guardrails to prevent those fLast updated a month ago910MIT