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 updated18272Why this server?
Enables LangGraph agents to coordinate access to shared resources with versioned state and conflict detection through MCP integration.
Why 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 updated25217MITWhy this server?
Enables the construction of stateful research agents in LangGraph that can systematically validate trading strategies and perform multi-step market analysis.
AlicenseAqualityBmaintenanceFrom 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 updated916MITWhy 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?
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?
Enables LangGraph workflows to incorporate safety tools for monitoring user messages and managing high-risk escalations.
AlicenseAqualityCmaintenanceIt'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 updated33Apache 2.0Why 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?
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 updated1012998