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?
Allows LangGraph agents to access live company registry data, walk ownership structures across multiple countries, and retrieve statutory filings from government sources.
AlicenseAqualityAmaintenanceUnmodified government company data from 27 registries, live. Cross-border UBO chain walker for AI agents. 60+ tools covering GB, IE, NO, FR, DE, NL, PL, BE, CH, LI, MC, IM, IS, CY, AU, NZ, CA, TW, HK, MY, FI, CZ, ES, IT, KR, US — raw upstream fields preserved, no LLM extraction.Last updated18104Apache 2.0Why this server?
Facilitates execution trace visualization and behavioral diffing for stateful LangGraph agentic workflows.
AlicenseAqualityAmaintenanceMCP 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 updated10129105Why this server?
Referenced as part of research workflow implementation, though listed as requiring additional validation and re-integration
AlicenseBqualityCmaintenanceThis is a Model Context Protocol (MCP) server adaptation of LangChain Ollama Deep Researcher. It provides the deep research capabilities as MCP tools that can be used within the model context protocol ecosystem, allowing AI assistants to perform in-depth research on topics (locally) via OllamaLast updated316MITWhy this server?
Provides governance for LangGraph agents, enabling identity-based permissions and human approval for high-risk actions.
AlicenseAqualityDmaintenanceGovernance 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 updated158Apache 2.0Why 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.
AlicenseAqualityDmaintenancePlay provably fair games with real SOL wagering for any AI agentLast updated5736MITWhy this server?
Utilizes LangGraph for workflow management and state tracking during the multi-step research process
AlicenseBqualityDmaintenanceAn automated research agent that leverages Google Gemini models and Google Search to perform deep, multi-step web research, generating sophisticated queries and producing citation-rich answers.Last updated127MITWhy this server?
Provides search capabilities for LangGraph documentation for building complex LLM applications
AlicenseBqualityBmaintenanceA Model Context Protocol server that enables intelligent searching across documentation for 30+ programming libraries and frameworks, fetching relevant information from official sources.Last updated238MITWhy this server?
Enables the construction of stateful research agents in LangGraph that can systematically validate trading strategies and perform multi-step market analysis.
AlicenseAqualityAmaintenanceFrom 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 updated917MITWhy this server?
Supports building complex AI agents in LangGraph by providing specialized tools for document analysis and data transformation.
AlicenseAqualityBmaintenanceAgent 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 updated2533MIT