Prism (Facilitator)

Documentation Index

Fetch the complete documentation index at: https://developers.fd.xyz/llms.txt

Use this file to discover all available pages before exploring further.

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How It Works

1. A request arrives without a valid payment header
2. Middleware returns 402 Payment Required with x402Version, accepts, and resource fields
3. The agent’s wallet pays on-chain and retries with an X-PAYMENT header
4. Prism’s Spectrum layer verifies the on-chain transfer
5. If valid, the request proceeds and the transaction hash returns in X-PAYMENT-RESPONSE

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Integration

import { prismPaymentMiddleware } from "@1stdigital/prism-express";

app.use(
  prismPaymentMiddleware(
    {
      identifyToken: process.env.PRISM_IDENTIFY_TOKEN,
      baseUrl: "https://prism-gw.fd.xyz",
    },
    {
      "/api/premium":     { price: "$0.01", description: "Premium data" },
      "/api/ai/generate": { price: "$0.50", description: "AI generation" },
    },
  ),
);