Cairo Coder MCP Server

@kasarlabs

Repository

Basic information

About Cairo Coder MCP Server

The most powerful open-source Cairo code generator.

#cairo#coder#zk#starknet #ethereum #blockchain #smart-contracts

Cairo Coder MCP Server config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "cairo coder": {
      "command": "npx",
      "args": [
        "-y",
        "@kasarlabs/cairo-coder-mcp"
      ],
      "env": {
        "CAIRO_CODER_API_KEY": "<YOUR_API_KEY>"
      }
    }
  }
}

Cairo Coder MCP Server tools

Provides technical assistance with writing, refactoring, debugging, and understanding Cairo smart contracts and programs. Call this tool when the user needs to: - **Write or generate Cairo code** from scratch - **Refactor or optimize** existing Cairo code - **Debug compilation errors** or runtime issues - **Implement specific Cairo features** (traits, storage, events, etc.) - **Understand Cairo syntax** and best practices - **Complete TODO sections** in Cairo smart contracts This tool has access to Cairo documentation, code examples, corelib references, and technical guides.

Overview

What is Cairo Coder?

A Model Context Protocol (MCP) server that provides AI‑assisted Cairo and Starknet development through the Cairo Coder API. It is built for developers writing, refactoring, or learning Cairo smart contracts on Starknet.

How to use Cairo Coder?

Run it directly with npx -y @kasarlabs/cairo-coder-api. Set the CAIRO_CODER_API_KEY environment variable with your API key. For Claude Desktop, add a cairo-coder entry to claude_desktop_config.json with the same command and environment variable. The server exposes one tool, assist_with_cairo, which accepts a required query and an optional context string.

Key features of Cairo Coder

Write Cairo smart contracts and Starknet code
Refactor and optimize existing Cairo code
Implement features and complete TODOs
Learn about the Starknet ecosystem and best practices
Receive advice based on official Cairo/Starknet documentation

Use cases of Cairo Coder

Generate a complete counter contract in Cairo
Optimize an existing Starknet contract with context and code snippets
Get step‑by‑step guidance on using OpenZeppelin for an ERC20 token

Frequently asked questions

What is Cairo Coder MCP server?

It is an MCP server that uses the Cairo Coder API to assist with Cairo and Starknet development tasks, such as writing, refactoring, and learning.

How do I set up Cairo Coder?

Run `npx -y @kasarlabs/cairo-coder-api` and provide your API key via the `CAIRO_CODER_API_KEY` environment variable. For Claude Desktop, add the server configuration to `claude_desktop_config.json`.

What tool does Cairo Coder provide?

The server offers one tool: `assist_with_cairo`. It takes a required `query` (your development question) and an optional `context` (code snippets or additional information).

What are the runtime requirements for Cairo Coder?

Node.js version 18 or higher and npm or yarn are required to run the server locally.

Where can I get help or report issues?

Visit the GitHub Issues page for the repository (https://github.com/kasarlabs/cairo-coder-api/issues) or refer to the Model Context Protocol documentation.

Comments

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