pumpfun-mcp

A Model Context Protocol (MCP) server for interacting with the Pump.fun platform on Solana. This server enables AI assistants to create, buy, and sell tokens on the Pump.fun platform.

Usage

https://github.com/user-attachments/assets/0b0f1f6f-6ea6-4ca8-92a8-b4cc895814e4

To use this server with Claude or other MCP-compatible AI assistants, add the following configuration to your MCP client:

If you're on MacOS and want to run this in Claude Desktop, in your ~/Library/Application \Support/Claude/claude_desktop_config.json file, write the following:

{
  "mcpServers": {
    "pumpfun": {
      "command": "node",
      "args": ["/Users/noahsolomon/Desktop/pumpfun-mcp/build/index.js"], // note this should be YOUR absolute path to index.js, not mine.
      "env": {
        "HELIUS_RPC_URL": "https://your-helius-rpc-url.com"
      }
    }
  }
}

Replace https://your-helius-rpc-url.com with your Helius RPC URL.

Installation

Clone this repository:

git clone https://github.com/noahgsolomon/pumpfun-mcp.git
cd pumpfun-mcp

Install dependencies:
```
npm install
```
Create a .env file with your Solana RPC URL:
```
HELIUS_RPC_URL=https://your-helius-rpc-url.com
```
You can get a free RPC URL from Helius.

To use an existing Solana wallet, add your private key to the .env file:
```
PRIVATE_KEY=your-base58-encoded-private-key
```
Then run the conversion script to create a keypair file:
```
node convert-key.js
```
This will create a default.json file in the .keys folder with your keypair.
Build the project:
```
npm run build
```
Run the MCP server:
```
node build/index.js
```

Components

Tools

get-token-info
- Get information about a Pump.fun token
- Input parameters:
  - tokenAddress (string, required): The token's mint address
create-token
- Create a new Pump.fun token
- Input parameters:
  - name (string, required): Token name
  - symbol (string, required): Token symbol
  - description (string, required): Token description
  - imageUrl (string, optional): Path to local image file
  - initialBuyAmount (number, required): Initial buy amount in SOL (min 0.0001)
  - accountName (string, optional): Name of the account to use (defaults to "default")
buy-token
- Buy a Pump.fun token
- Input parameters:
  - tokenAddress (string, required): The token's mint address
  - buyAmount (number, required): Amount to buy in SOL (min 0.0001)
  - accountName (string, optional): Name of the account to use (defaults to "default")
  - slippageBasisPoints (number, optional): Slippage tolerance in basis points (defaults to 100)
sell-token
- Sell a Pump.fun token
- Input parameters:
  - tokenAddress (string, required): The token's mint address
  - sellAmount (number, required): Amount of tokens to sell (use 0 to sell all)
  - accountName (string, optional): Name of the account to use (defaults to "default")
  - slippageBasisPoints (number, optional): Slippage tolerance in basis points (defaults to 100)
list-accounts
- List all accounts in the keys folder
- No input parameters required
get-account-balance
- Get the SOL and token balances for an account
- Input parameters:
  - accountName (string, optional): Name of the account to check (defaults to "default")
  - tokenAddress (string, optional): Token address to check balance for

Account Management

The MCP automatically creates and manages Solana keypairs in the .keys folder. Each keypair is stored as a JSON file with the account name as the filename.

When creating a token, the mint keypair is also saved in the .keys folder with the prefix mint-.

To use the MCP with your own account, you need to:

Add your private key to the .env file and run node convert-key.js
Have sufficient SOL in that wallet

Standalone Scripts

The project includes several standalone scripts that can be run directly:

Get Token Info: node build/get-token-info.js <token_address>
Create Token: node build/create-token.js <name> <symbol> <description> <initial_buy_amount> [account_name] [image_url]
Buy Token: node build/buy-token.js <token_address> <buy_amount_sol> [account_name] [slippage_basis_points]
Sell Token: node build/sell-token.js <token_address> <sell_amount> [account_name] [slippage_basis_points]
List Accounts: node build/list-accounts.js
Get Account Balance: node build/get-token-balance.js <account_name> [token_address]

Important Notes

Security: The keypairs are stored unencrypted in the .keys folder. Make sure to secure this folder appropriately.
Fees: All transactions on Solana require SOL for transaction fees. Make sure your accounts have enough SOL.
Slippage: The default slippage tolerance is 1% (100 basis points). You can adjust this for each transaction.
Images: When creating tokens with images, you must provide a local file path to the image. Remote URLs are not supported.

Development

Project Structure

src/index.ts: Main MCP server entry point
src/get-token-info.ts: Token information retrieval
src/create-token.ts: Token creation functionality
src/buy-token.ts: Token buying functionality
src/sell-token.ts: Token selling functionality
src/list-accounts.ts: Account listing functionality
src/get-token-balance.ts: Account balance checking
src/utils.ts: Shared utility functions
convert-key.js: Utility to convert a base58 private key to a keypair JSON file

Building

npm run build