Best LangChain MCP Servers
LangChain is a framework for developing applications powered by language models, providing tools and components to build context-aware, reasoning applications that integrate with external data sources.
Why this server?
Provides integration examples for using SignNow eSignature tools within LangChain AI agent frameworks
AlicenseAqualityCmaintenancehttps://github.com/signnow/sn-mcp-server MCP server for SignNow e-signature: templates, invites, embedded signing/editor, status & downloads.Last updated258MITWhy this server?
Drop-in tools for LangChain, exposing functions to check reputation, submit ratings, and list services.
AlicenseAqualityAmaintenanceA free, open reputation registry for AI microservices: check a service's trust score before calling it and submit a rating afterward. Ratings can be backed by cryptographic receipts signed by the service and are recorded in a verifiable Merkle audit log.Last updated3Apache 2.0Why this server?
Provides a recipe for using ProsodyAI as a LangChain tool, enabling AI agents to incorporate prosody-driven adaptation into LangChain workflows.

@prosodyai/mcp-docsofficial
AlicenseAqualityBmaintenanceExposes ProsodyAI documentation, SDK references, REST API reference (OpenAPI), and curated implementation recipes to AI coding agents via MCP tools and resources.Last updated8MITWhy this server?
Provides LangChain agents with tools to access emem's Earth memory protocol for recalling, comparing, and verifying spatial facts about locations worldwide.
Why this server?
Provides integration examples for connecting the Teamwork.com MCP server with LangChain applications in both Node.js and Python
Why this server?
Provides a search and evidence tool that can be wrapped as a LangChain tool for agentic applications.
AlicenseBqualityAmaintenanceMCP search and evidence tool for AI agents. Rewrites queries, zooms into source domains, and returns sourced answers with metrics.Last updated411MITWhy this server?
Provides LangChain integration tools for building AI agents with business intelligence capabilities, including entity search, profile lookup, and healthcare professional verification.
AlicenseAqualityBmaintenanceStructured business intelligence for AI agents. 5.5M verified entities across 34 countries, 40.3M BORME mercantile acts, EU VAT validation, GLEIF, healthcare registries. 20 tools.Last updated61MITWhy this server?
Provides seamless integration with the LangSmith observability platform, enabling language models to fetch conversation history, manage prompts, retrieve traces and runs, work with datasets and examples, and access experiment and evaluation data from LangSmith projects.

LangSmith MCP Serverofficial
AlicenseAqualityCmaintenanceEnables language models to access LangSmith observability platform features including fetching conversation history, managing prompts, retrieving traces and runs, working with datasets and examples, and analyzing experiments.Last updated13129MITWhy this server?
Facilitates Graph RAG (Retrieval-Augmented Generation) workflows through integration with LangChain4j.
AlicenseAqualityAmaintenanceArcadeDB Multi-Model Database, one DBMS that supports SQL, Cypher, Gremlin, HTTP/JSON, MongoDB and Redis. ArcadeDB is a conceptual fork of OrientDB, the first Multi-Model DBMS. ArcadeDB supports Vector Embeddings.Last updated101,056Apache 2.0