xAPI-Fi Logo
$./xapi--protocolx402

> Monetize_Any_API
in_60_Seconds

// Slap payment gates on your endpoints.
// Get paid in crypto. Automatically.
// No blockchain complexity. No bullshit.

xapi-flow.sh
[1]
POST /api/your-endpoint
→ Client makes request
x402 intercept
[2]
VERIFY payment signature
→ Check crypto payment (0.001 XRP)
✓ Payment confirmed in ~200ms
execute
[3]
RETURN {data: ...}
→ Response sent to client
→ Revenue credited to your wallet
Total: ~300ms overhead$ 0.001 per call

One Line of Code

[ Add payment gates to any endpoint with a single middleware ]

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

Why xAPI-Fi?

The most powerful API monetization platform in Web3

One-Line Integration
Add payment gates to any endpoint. Framework agnostic. Copy-paste setup.
Instant Settlement
Automatic payment verification. Real-time treasury deposits. Zero gas fees.
Usage Analytics
Revenue per endpoint dashboard. User insights. Payment success rates.
Flexible Pricing
Pay-per-call, tiered subscriptions, or dynamic pricing rules.
Developer First
TypeScript SDK. OpenAPI integration. Comprehensive documentation.
Enterprise Ready
99.9% uptime SLA. Custom facilitator nodes. White-label options.

Built for Modern APIs

AI Model Providers
Charge per inference
Data Providers
Monetize every query
SaaS Platforms
Usage-based billing
Content APIs
Pay-per-article access
Gaming APIs
Microtransaction infrastructure
Analytics Services
Real-time data streaming
Ready to Start Earning?
Join developers monetizing their APIs with x402