xAPI-Fi

xAPI-Fi

Introduction

Monetize Any API in 60 Seconds

xAPI-Fi is the Stripe for Web3 APIs - instant monetization infrastructure for the AI and data economy. Transform any API endpoint into a monetized, x402-enabled service with one line of code.

What is xAPI-Fi?

xAPI-Fi provides a simple, developer-first way to add payment gates to your API endpoints. Whether you're building AI services, data APIs, or any other service, xAPI-Fi handles the payment infrastructure so you can focus on building great products.

Key Features

  • ▹One-Line Integration: Add payment gates to any endpoint with a single middleware
  • ▹Instant Settlement: Automatic payment verification and real-time deposits via x402 protocol
  • ▹Usage Analytics: Track revenue, requests, and user behavior in real-time
  • ▹Flexible Pricing: Support for pay-per-call, tiered subscriptions, or dynamic pricing
  • ▹Developer First: TypeScript SDK with comprehensive documentation
  • ▹Enterprise Ready: 99.9% uptime SLA and white-label options

How It Works

  1. ▹Install the SDK: Add @xapi-fi/sdk to your project
  2. ▹Protect Your Endpoints: Wrap your API routes with the xAPI-Fi middleware
  3. ▹Get Paid: Users automatically pay when they call your endpoints
  4. ▹Track Performance: Monitor usage and revenue in your dashboard

Quick Example

terminal
import XAPIFi from '@xapi-fi/sdk/server';

const xapi = new XAPIFi({
  apiKey: process.env.XAPI_FI_KEY
});

// Express
app.post('/api/generate',
  xapi.protect({ price: 0.001 }),
  async (req, res) => {
    const result = await generateContent(req.body);
    res.json(result);
  }
);

Why xAPI-Fi?

Traditional payment infrastructure is complex and slow. Credit card processing takes days to settle, has high fees, and requires extensive compliance work. xAPI-Fi leverages the x402 protocol to provide:

  • ▹Instant settlement: Payments clear in seconds, not days
  • ▹Low fees: Micropayments are finally economical
  • ▹Global access: Anyone with a Web3 wallet can use your API
  • ▹No compliance burden: x402 handles the complexity

Next Steps

Support