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Best-for list

Best free MCP servers

You don't need a paying SaaS service to start shipping agents with MCP servers. These six are open-source, free to host, and need no API keys. Start here if you're exploring the idea or scaling beyond API meter limits.

The picks

Ranked by fit, not by popularity. Each entry links to its full Directories page.

  1. 1
    M MCP

    Brave Search MCP

    by Brave (reference implementation)

    Open-source web search with no per-call billing.

    Brave Search doesn't meter individual queries. Run a research agent that searches the web thousands of times without hitting a paywall. The server is open-source. Host it locally and you have free, unlimited search.

    Full entry
  2. 2
    M MCP

    Postgres MCP Server

    by Model Context Protocol (reference)

    Query your own Postgres database with zero SaaS fees.

    The MCP server is open-source. If you already run Postgres, add this server and agents can query your data without licensing a new tool. Popular for teams migrating from commercial databases.

    Full entry
  3. 3
    M MCP

    Playwright MCP

    by Microsoft

    Open-source browser automation for web scraping and inspection.

    Playwright is free and open-source. The MCP server lets agents drive a headless browser. Scrape a website, take a screenshot, fill a form. No cloud service fees, no seat licensing. Just compute time.

    Full entry
  4. 4
    O OSS

    LangGraph

    by LangChain

    Open-source orchestration framework for building agent workflows.

    LangGraph is MIT-licensed. Build complex agent workflows with state machines, memory, and replay. No runtime licensing. Self-host on your own infra. Popular for teams building research and support agents.

    Full entry
  5. 5
    O OSS

    CrewAI

    by CrewAI

    Open-source multi-agent framework with minimal dependencies.

    CrewAI is Apache 2.0 licensed. Assemble agents into crews that collaborate. No platform lockdown. Runs on your machine. Good for teams that want agents without a commercial runtime fee.

    Full entry
  6. 6
    M MCP

    GitHub MCP Server

    by GitHub

    Query GitHub using a free personal access token.

    GitHub's API is free for public and private repos. The MCP server doesn't add cost. For open-source projects or internal repos, give agents full visibility into your codebase without licensing a symbol indexer.

    Full entry
Why Enterprise DNA

Run every pick on one platform.

Enterprise DNA is open-source too. Compose free MCP servers with Claude Code, a free agent runtime. Query your databases, search the web, drive GitHub. Your whole agent stack costs nothing to operate. The only meter is your own compute.

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