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?
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 updated210930Apache 2.0Why this server?
Provides tools for LangChain agents to interact with the Clicks Protocol for yield-bearing payment management and autonomous agent registration.

Clicks Protocolofficial
AlicenseAqualityBmaintenanceAutonomous DeFi yield for AI agents on Base. Query APY rates, agent status, payment splits, and referral stats. 4 read-only tools + 1 resource.Last updated91MITWhy this server?
Provides an optional LangChain agent CLI that uses MCP tools to interact directly with the 3DCityDB database.

3DCityDB MCP Serverofficial
AlicenseAqualityCmaintenanceEnables AI assistants to interact with 3DCityDB v5 through natural language, dynamically resolving object classes, properties, and codelists to answer spatial questions and execute SQL queries on CityGML data.Last updated146Apache 2.0Why this server?
Allows integration with LangChain by providing MCP tools that can be used with LangChain's MultiServerMCPClient for building AI agent workflows.

trade-router-mcpofficial
AlicenseBqualityCmaintenanceNon-custodial Solana swap & limit order engine for AI agents. 21 tools - swap, limit, trailing, TWAP, DCA, combo orders - across Raydium, PumpSwap, Orca, Meteora. Jito MEV-protected execution. Ed25519-verified server messages. Private key never leaves the process.Last updated211012MITWhy this server?
Compatible with LangChain agents as MCP clients for browser automation and end-to-end testing
Why this server?
Provides integration examples for using SignNow eSignature tools within LangChain AI agent frameworks

SignNow MCP Serverofficial
AlicenseAqualityBmaintenancehttps://github.com/signnow/sn-mcp-server MCP server for SignNow e-signature: templates, invites, embedded signing/editor, status & downloads.Last updated256MITWhy 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 updated6MITWhy 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 updated13121MITWhy 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
AlicenseAqualityCmaintenanceExposes ProsodyAI documentation, SDK references, REST API reference (OpenAPI), and curated implementation recipes to AI coding agents via MCP tools and resources.Last updated8MIT