@azeth/provider

x402 service provider tooling for Azeth. Gate your Hono endpoints behind x402 payments with built-in payment-agreement support, SIWx sessions, and automatic reputation feedback.

Installation

npm install @azeth/provider
# or
pnpm add @azeth/provider

Quick Start

import { Hono } from 'hono';
import { createX402StackFromEnv } from '@azeth/provider';

const app = new Hono();

const { middleware, facilitator } = await createX402StackFromEnv({
  app,
  routes: {
    '/api/data': { price: '\$0.01', resource: 'https://api.example.com/data' },
  },
});

app.use('/api/*', middleware);

app.get('/api/data', (c) => c.json({ answer: 42 }));

Features

• x402 Payment Middleware -- Returns 402 with payment requirements, validates on-chain USDC settlement
• Payment Agreements -- Recurring subscriptions via on-chain PaymentAgreementModule
• SIWx Sessions -- Agreement-aware session storage for repeat customers
• Agreement Keeper -- Periodic execution of due payment agreements
• Pre-Settled Payments -- Middleware for endpoints accepting pre-settled x402 proofs
• Local Facilitator -- On-chain payment verification without external facilitator dependency

API

Stack Setup

Export	Description
createX402Stack(config)	Create x402 middleware + facilitator from explicit config
createX402StackFromEnv(routes, overrides?)	Create from env vars. Auto-resolves payTo to your smart account if not set.
LocalFacilitatorClient	On-chain USDC settlement verification

Payment Agreements

Export	Description
createPaymentAgreementExtension()	x402 extension for agreement-based payments
AzethSIWxStorage	Agreement-aware SIWx session storage
AgreementKeeper	Periodic execution of due agreements
findActiveAgreementForPayee()	LRU-cached agreement lookup

Middleware

Export	Description
preSettledPaymentMiddleware	Accept pre-settled x402 payment proofs
paymentMiddlewareFromHTTPServer	Standard x402 HTTP resource server middleware

License

MIT