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chainlist-mcp

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An MCP server that gives AI agents fast access to verified EVM chain information, including RPC URLs, chain IDs, explorers, and native tokens.

2 stars PythonAI & Machine Learning Updated Jun 13, 2025

Documentation

Chainlist MCP Server

An MCP server that gives AI agents fast access to verified EVM chain information, including RPC URLs, chain IDs, explorers, and native tokens — sourced from Chainlist.org.

GitHub License
Python Version
Status

Features

  • Efficient Data Fetching: Caches Chainlist API data to minimize requests.
  • Flexible Search: Case-insensitive keyword matching using regex for `getChainsByKeyword`.
  • Structured Output: Markdown responses with tabulated `rpc` and `explorers` for readability.

Installation

Prerequisites

  • Python: Version 3.10 or higher.
  • uv: Recommended for managing Python projects and dependencies (install via `pip install uv` or follow uv documentation).

Steps

1. Clone the Repository:

bash
git clone https://github.com/kukapay/chainlist-mcp.git
   cd chainlist-mcp

2. Install Dependencies:

bash
uv sync

3. Installing to Claude Desktop:

Install the server as a Claude Desktop application:

bash
uv run mcp install cli.py --name "Chainlist MCP"

Configuration file as a reference:

json
{
       "mcpServers": {
           "Chainlist MCP": {
               "command": "uv",
               "args": [ "--directory", "/path/to/chainlist-mcp", "run", "main.py" ] 
           }
       }
    }

Replace `/path/to/chainlist-mcp` with your actual installation path.

Usage

The server exposes two tools via the MCP protocol, accessible through MCP-compatible clients or the MCP Inspector.

Tools

`getChainById`

  • Description: Retrieves details of a blockchain by its chain ID.
  • Parameters:
    • `chain_id` (integer): The unique identifier of the blockchain (e.g., 1 for Ethereum Mainnet).
  • Returns: A Markdown string with chain details or an error message.

Example Prompt (in an MCP client):

code
Get the details for the blockchain with chain ID 1.

Example Response:

markdown
**Chain Details**
- **Name**: Ethereum Mainnet
- **Chain ID**: 1
- **Native Currency**: Ether (ETH, 18 decimals)
- **TVL**: 134376951329.85631
**RPC Endpoints**:
| URL                                          | Tracking |
|----------------------------------------------|----------|
| https://eth.llamarpc.com                     | none     |
| https://go.getblock.io/...                   | none     |
...
**Explorers**:
| Name       | URL                        | Standard |
|------------|----------------------------|----------|
| etherscan  | https://etherscan.io       | EIP3091  |
...

`getChainsByKeyword`

  • Description: Searches for blockchains by keyword (case-insensitive partial match).
  • Parameters:
    • `keyword` (string): The keyword or partial name to search (e.g., 'eth').
    • `limit` (integer, optional): Maximum number of results (default: 5).
  • Returns: A Markdown string listing up to `limit` matching chains or an error message.

Example Prompt (in an MCP client):

code
Find blockchains with 'eth' in their name, limit to 2 results.

Example Response:

markdown
**Matching Chains**

### Chain 1
**Chain Details**
- **Name**: Ethereum Mainnet
- **Chain ID**: 1
- **Native Currency**: Ether (ETH, 18 decimals)
- **TVL**: 134376951329.85631
**RPC Endpoints**:
| URL                                          | Tracking |
|----------------------------------------------|----------|
| https://eth.llamarpc.com                     | none     |
...
**Explorers**:
| Name       | URL                        | Standard |
|------------|----------------------------|----------|
| etherscan  | https://etherscan.io       | EIP3091  |
...

### Chain 2
**Chain Details**
- **Name**: Ethereum Goerli
- **Chain ID**: 5
- **Native Currency**: Ether (ETH, 18 decimals)
- **TVL**: N/A
**RPC Endpoints**:
| URL                                          | Tracking |
|----------------------------------------------|----------|
| https://goerli.infura.io/...                 | yes      |
...
**Explorers**:
| Name       | URL                        | Standard |
|------------|----------------------------|----------|
| etherscan  | https://goerli.etherscan.io | EIP3091  |
...

License

This project is licensed under the MIT License. See the LICENSE file for details.

Frequently asked questions

What is chainlist-mcp?

chainlist-mcp is An MCP server that gives AI agents fast access to verified EVM chain information, including RPC URLs, chain IDs, explorers, and native tokens.

How do I install chainlist-mcp?

Open the GitHub repository and follow its README. Most MCP servers are added to your client's MCP config, then called by your agent.

Is chainlist-mcp open source?

Yes — it is hosted on GitHub at https://github.com/kukapay/chainlist-mcp and has 2 stars.

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