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x402 Dev Console

v1.0.0

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x402 Payment Protocol

v1.0.0PaymentsTools 7 actions
Use with an LLMTry in Playground

SERVER URL

http://localhost:3000/api/mcp-server/x402-payments

CONNECTION JSON

{
  "mcpServers": {
    "x402-payments": {
      "command": "npx",
      "args": [
        "mcp-remote@latest",
        "http://localhost:3000/api/mcp-server/x402-payments"
      ]
    }
  }
}

Learn more about supported MCP clients

MCP HOST CONNECTIONS

Connect this MCP server directly to your AI assistant tools by using the JSON config above. Click on a logo to see a demo video.

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CursorWatch demo
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ClaudeWatch demo
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WindsurfWatch demo

DESCRIPTION

Complete payment protocol for autonomous AI agents on Solana. Handles payment requirements, transaction submission, verification, and wallet management with on-chain proof and cryptographic guarantees.

AVAILABLE TOOLS

get_payment_requirements

Fetch payment instructions for a resource

submit_payment

Submit a signed Solana transaction

verify_payment

Verify payment receipt with x402 facilitator

get_wallet_state

Display wallet balances and recent activity

get_transaction_history

Fetch recent transactions for an address

exchange_rate_feed

Get current USDC/USD and SOL/USD rates

health_check

Check Solana RPC and x402 gateway status

CODE EXAMPLES

JavaScript
// TypeScript Example
import { MCPClient } from '@x402/mcp-client';

const client = new MCPClient('https://api.x402.app');

// Get payment requirements
const payment = await client.callTool({
  name: 'get_payment_requirements',
  arguments: {
    resource_id: 'premium-api-access'
  }
});

// Submit payment
const result = await client.callTool({
  name: 'submit_payment',
  arguments: {
    signature: txSignature,
    resource_id: 'premium-api-access'
  }
});

Official MCP SDK Documentation:
https://github.com/modelcontextprotocol/modelcontextprotocol

Installation:
npm install @modelcontextprotocol/sdk

Authentication:
- For MCP Hosts (Cursor, Windsurf, Claude Desktop), saving the JSON config to your tool will automatically trigger the browser OAuth flow
- For programmatic access, obtain the OAuth token by running "npx mcp-remote <url>" in the terminal and follow the instructions

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