fernsugi/x402-api-server

Overview

An API server implementing the x402 protocol for pay-per-call DeFi data endpoints. It enables USDC micropayments on the Base network for each API request. Built in JavaScript, it provides a server that handles payment verification and data delivery.

Best for

Best for
Developers building DeFi applications that need pay-per-call data access with USDC micropayments on Base

Use cases

• Serve DeFi data endpoints with per-call USDC micropayments
• Integrate pay-per-use data feeds into dApps on Base
• Build a monetized API for blockchain data without subscriptions

How to use

Install

npx @x402-api/mcp-server

Tools exposed

• PAY_TO_ADDRESS
• NODE_ENV
• BASE_RPC_URL
• X402_SETTLEMENT_MODE
• X402_SETTLEMENT_PRIVATE_KEY
• X402_FACILITATOR_URL
• X402_FACILITATOR_API_KEY

Tested with

Claude Desktop

Notes

An API server implementing the x402 protocol for pay-per-call DeFi data endpoints. It enables USDC micropayments on the Base network for each API request. Built in JavaScript, it provides a server that handles payment verification and data delivery.

2 stars on GitHub. Last updated 2026-03-25.

Use cases

• Serve DeFi data endpoints with per-call USDC micropayments
• Integrate pay-per-use data feeds into dApps on Base
• Build a monetized API for blockchain data without subscriptions

Pros

• Implements the x402 protocol for standardized pay-per-call payments
• Uses USDC on Base for low-cost micropayments
• Open source and customizable for specific data endpoints

Cons

• Very early stage with only 2 GitHub stars and limited community
• Currently only supports Base network for payments
• Requires running and maintaining your own server instance

Indexed from awesome-mcp-servers-punkpeye and enriched against its public facts.