my-x402-mcp

MCP tool with x402 payment middleware for fetching cryptocurrency data from DexScreener.

Features

• Payment-protected API: $0.002 USDC per call via x402

• Network: Base Mainnet (eip155:8453)

• Data source: DexScreener public API

• MCP compliant: Tool metadata endpoint included

Related MCP server: Mario A2MCP Intelligence Suite

Setup

1. Install dependencies:

npm install

2. Create .env file:

cp .env.example .env

3. Run the server:

npm start

API Endpoints

GET /api/cryptodata

Fetch token data from DexScreener (payment required).

Query Parameters:

• token (required): Token contract address

Example:

curl "http://localhost:3000/api/cryptodata?token=0x..."

Payment:

• Price: $0.002 USDC

• Network: Base Mainnet

• Payment address: 0xf081ee84c0d85278a6242bc265f0b312021ebeb1

GET /mcp/tools

Get MCP tool metadata.

GET /health

Health check endpoint.

Deployment

Deploy to Vercel:

vercel

The vercel.json configuration is already set up for Express.

Response Format

{
  "token": "0x...",
  "timestamp": "2026-09-04T13:40:35.000Z",
  "pairs": [...],
  "schemaVersion": "1.0.0"
}