LynxPrompt

lynxprompt-mcp

An MCP server for any LynxPrompt instance. LLMs use it to browse, search and manage AI configuration blueprints.

It works with lynxprompt.geiser.cloud or your own self-hosted LynxPrompt, over HTTP or stdio.

Features

• Tools to search the public marketplace, list your own blueprints and hierarchies, read any blueprint you can see, and create, update and delete them. Every tool carries a title, read-only/destructive hints and an output schema.
• update_blueprint takes the content_checksum from get_blueprint as expected_checksum, so it never silently overwrites an edit made elsewhere.
• LYNXPROMPT_READ_ONLY=true registers only the read tools.
• Read-only resources too: lynxprompt://blueprints, lynxprompt://blueprint/{id}, lynxprompt://hierarchies, lynxprompt://hierarchy/{id}, lynxprompt://user.
• Speaks MCP 2026-07-28 and every earlier revision down to 2024-11-05 from the same binary, so current clients (which still use the initialize handshake) and 2026-07-28 clients both work.
• stdio, or stateless Streamable HTTP on /mcp with Origin checks, a body limit and bearer auth when exposed.
• Ships as an npm package (npx lynxprompt-mcp), a Docker image and multi-arch Go binaries.

Tools

Install

Create an API token on your LynxPrompt instance under Settings, API tokens. For a self-hosted instance also set LYNXPROMPT_URL. Add LYNXPROMPT_READ_ONLY=true to hide the write tools.

Claude Code

claude mcp add lynxprompt --scope user --env LYNXPROMPT_TOKEN=lp_... -- npx -y lynxprompt-mcp

Claude Desktop (claude_desktop_config.json) and Cursor (~/.cursor/mcp.json)

{
  "mcpServers": {
    "lynxprompt": {
      "command": "npx",
      "args": ["-y", "lynxprompt-mcp"],
      "env": { "LYNXPROMPT_TOKEN": "lp_..." }
    }
  }
}

VS Code (.vscode/mcp.json, asks for the token once and stores it encrypted)

{
  "inputs": [
    { "type": "promptString", "id": "lynxprompt-token", "description": "LynxPrompt API token", "password": true }
  ],
  "servers": {
    "lynxprompt": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "lynxprompt-mcp"],
      "env": { "LYNXPROMPT_TOKEN": "${input:lynxprompt-token}" }
    }
  }
}

Codex (~/.codex/config.toml)

[mcp_servers.lynxprompt]
command = "npx"
args = ["-y", "lynxprompt-mcp"]
env = { LYNXPROMPT_TOKEN = "lp_..." }

Docker (stdio, any client): command docker, args ["run", "-i", "--rm", "-e", "TRANSPORT=stdio", "-e", "LYNXPROMPT_TOKEN", "drumsergio/lynxprompt-mcp:v0.2.0"].

The npm package downloads the release binary on first run and checks its sha256 against the checksums shipped inside the package. The HTTP server, Docker Compose and local builds are in Getting started.

Documentation

• Getting started: Docker Compose, npm, local build
• Configuration: environment variables and MCP client configuration
• Usage: resources, tools and protocol versions
• Development: testing, contributing, credits
• Related projects: the family and registry listings

Related projects

LynxPrompt, the self-hosted platform this server talks to.

License

GPL-3.0-or-later