GStars
    modelcontextprotocol

    modelcontextprotocol/inspector

    Deterministic testing tools for MCP servers

    testing
    cli
    debug
    mcp
    tool
    tui
    TypeScript
    NOASSERTION
    11.2K stars
    1.6K forks
    11.2K GitHub watchers
    Updated Oct 30, 2026
    View on GitHub

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    Where it stands

    Rank, growth pace and release cadence relative to everything GStars tracks.

    5 releases in the last 90 days, the latest 2 days ago, with 134 contributors on GitHub.

    Gained 30% fewer stars in the last 90 days than in the 90 days before.

    Use Cases & Benefits

    • Provides a visual testing and debugging tool for MCP servers with both a web UI and a proxy server for protocol bridging.
    • Enables seamless interaction with MCP servers over multiple transport protocols via an intuitive browser interface and CLI, enhancing developer productivity.
    • Use for interactive development and debugging of MCP servers with real-time visual feedback in a React-based web UI.
    • Use for automated testing and scripting of MCP server operations through a CLI mode supporting tool calls and resource management.
    • Use for securely connecting to remote MCP servers with support for bearer token authentication and multiple transport types like SSE and streamable HTTP.

    Should you depend on it?

    License terms, project hygiene and risks, from GitHub metadata and GStars' snapshots.

    License

    Other

    GitHub could not identify this license; read the LICENSE file before depending on it.

    Community files

    • README: present
    • Contributing guide: present
    • Code of conduct: present

    Watch-outs

    • License not identified by GitHub; read the LICENSE file before depending on it.

    General guidance from repository metadata, not legal advice. How we score

    From the README

    The MCP inspector is a developer tool for testing and debugging MCP servers.

    The MCP Inspector consists of two main components that work together:

    Note that the proxy is not a network proxy for intercepting traffic. Instead, it functions as both an MCP client (connecting to your MCP server) and an HTTP server (serving the web UI), enabling browser-based interaction with MCP servers that use different transport protocols.

    Excerpt from the modelcontextprotocol/inspector README on GitHub (NOASSERTION license). © its authors.Read the full README on GitHub

    Daily snapshots

    Stars gained per day, and how forks and open issues moved, from GStars' daily snapshots

    Forks

    1.6K+97

    Open issues

    28-31

    Compared with peers in Testing

    Fastest-growing repositories GStars tracks in this cohort for the week of Nov 1, by 7-day star growth

    View category →
    modelcontextprotocol/inspector compared with Testing repositories by stars, 7-day star growth, health score and last release
    RepositoryStars+7dHealthLast release
    D4Vinci/Scrapling98.1K+6.9K651 day ago
    lexmount/moli22.7K+1.2K552 days ago
    tester-army/e2e13.3K+1.0K45today
    keploy/keploy19.5K+56445today
    usebruno/bruno48.2K+2815914 days ago
    modelcontextprotocol/inspector11.2K—652 days ago
    Category median22.7K+1.0K55—
    Compare inspector with Scrapling, moli, e2e →

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