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Lisply

v1.0.0•Developer Tools•stable

Model Context Protocol (MCP) server to manage and talk to compliant 'Lisply' lisp-speaking backend services

lisplymcpai-integration
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What is Lisply?

Lisply is a Model Context Protocol (MCP) server that allows AI assistants like Claude, Cursor, and VS Code to model context protocol (mcp) server to manage and talk to compliant 'lisply' lisp-speaking backend services

Model Context Protocol (MCP) server to manage and talk to compliant 'Lisply' lisp-speaking backend services

This server falls under the Developer Tools category on MCPgee, the world's largest MCP server directory with 33,000+ servers.

Features

  • Model Context Protocol (MCP) server to manage and talk to co

Use Cases

Manage Lisply lisp-speaking backend services via MCP.
gornskew

Maintainer

LicenseAGPL-3.0
Languagepython
Versionv1.0.0
UpdatedApr 26, 2026
Statushealthy
Maintenanceactive

Works with

ClaudeOpenAIwindowsmacoslinux
View SourceBrowse All Servers

Installation

Manual Installation

npx lisply

Configuration

Configuration Details

Config File

claude_desktop_config.json

Performance

Response Metrics

Response Time< 200ms
ThroughputMedium

Resource Usage

Memory UsageLow
CPU UsageLow

How to Set Up and Use Lisply

Lisply MCP is a Node.js-based MCP server that connects AI agents to Lisply-compliant Common Lisp backend services, enabling them to evaluate Lisp expressions, make HTTP requests, and interact with a live Lisp REPL running inside a Docker container. It supports both Clozure Common Lisp (CCL) and SBCL, auto-starts the appropriate Docker container on demand, and exposes tools for Lisp evaluation and HTTP interaction with the backend. Lisp developers and researchers who want Claude to write, run, and debug Common Lisp code in a live environment will find this server essential.

Prerequisites

  • Node.js 18+ (Windows or WSL compatible)
  • Docker 20+ running on the same host as Node.js
  • Git (to clone the repository)
  • Claude Desktop or another MCP-compatible client
  • Basic familiarity with Common Lisp (CCL or SBCL)
1

Clone the repository

Clone the lisply-mcp repository to your local machine.

git clone https://github.com/gornskew/lisply-mcp.git
cd lisply-mcp
2

Install dependencies

Install the Node.js dependencies for the MCP wrapper script.

cd scripts
npm install
chmod +x mcp-wrapper.js
3

Verify the wrapper

Run the wrapper with --help to confirm it is set up correctly and to see available command-line arguments.

node mcp-wrapper.js --help
4

Configure Claude Desktop

Add the lisply-mcp server to your claude_desktop_config.json. Specify the server name, HTTP port, and Lisp implementation. The wrapper will auto-start the Docker container.

{
  "mcpServers": {
    "gendl-ccl": {
      "command": "node",
      "args": [
        "/path/to/lisply-mcp/scripts/mcp-wrapper.js",
        "--server-name", "gendl-ccl",
        "--http-port", "9080",
        "--lisp-impl", "ccl"
      ]
    }
  }
}
5

Mount host directories (optional)

Use --mount flags to share local project directories with the Lisp container so the agent can load and evaluate files from your file system.

"args": [
  "/path/to/lisply-mcp/scripts/mcp-wrapper.js",
  "--server-name", "gendl-ccl",
  "--mount", "/home/user/projects:/projects",
  "--mount", "/home/user/data:/data"
]
6

Test the connection

Restart Claude Desktop and ask it to evaluate a simple Lisp expression to verify the server is working.

Lisply Examples

Client configuration

Register lisply-mcp in Claude Desktop, pointing to the mcp-wrapper.js script with a specific Lisp implementation and HTTP port.

{
  "mcpServers": {
    "gendl-ccl": {
      "command": "node",
      "args": [
        "/home/user/lisply-mcp/scripts/mcp-wrapper.js",
        "--server-name", "gendl-ccl",
        "--http-port", "9080",
        "--lisp-impl", "ccl",
        "--debug"
      ]
    }
  }
}

Prompts to try

Use Claude to evaluate Lisp code and interact with the live Lisply backend.

- "Evaluate (+ 1 2 3) using the gendl-ccl__lisp_eval tool"
- "Define a Lisp function that computes the Fibonacci sequence and test it with n=10"
- "Check if the Lisply server is running with a ping"
- "Load and evaluate the file at /projects/my-lisp-file.lisp"
- "Make a GET request to /api/status on the Lisply backend"

Troubleshooting Lisply

Docker container does not start automatically when Claude Desktop launches

Ensure Docker Desktop is running before launching Claude Desktop. Check that the --docker-image argument or LISPLY_DOCKER_IMAGE env var points to a valid image. Run docker pull on the image manually if needed.

Lisp evaluation times out or hangs

Increase the timeout by setting LISPLY_EVAL_TIMEOUT (in milliseconds) in the environment or via config. The default is 30000ms. Long-running computations may need a higher value.

Permission denied on mcp-wrapper.js on Linux/macOS

Run chmod +x /path/to/lisply-mcp/scripts/mcp-wrapper.js. Also ensure the Node.js binary is in the PATH that Claude Desktop uses.

Frequently Asked Questions about Lisply

What is Lisply?

Lisply is a Model Context Protocol (MCP) server that model context protocol (mcp) server to manage and talk to compliant 'lisply' lisp-speaking backend services It connects AI assistants to external tools and data sources through a standardized interface.

How do I install Lisply?

Follow the installation instructions on the Lisply GitHub repository. Clone the repo, install dependencies, and add the server config to your AI client.

Which AI clients work with Lisply?

Lisply works with all major MCP-compatible AI clients including Claude Desktop, Claude Code, Cursor, VS Code (GitHub Copilot), Windsurf, and Cline.

Is Lisply free to use?

Yes, Lisply is open source and available under the AGPL-3.0 license. You can use it freely in both personal and commercial projects.

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Quick Config Preview

{ "mcpServers": { "lisply": { "command": "npx", "args": ["-y", "lisply"] } } }

Add this to your claude_desktop_config.json or .cursor/mcp.json

Read the full setup guide →

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