Institutional-grade RWA data, paid per call.

Every data endpoint is gated by HTTP 402 Payment Required. You don't pre-pay or hold a balance with us, instead your agent pays exactly for what it calls:

1. Call any data endpoint. With no payment attached you get a 402 plus a PAYMENT-REQUIRED header describing the price.
2. Your agent signs the payment (the @fourotwo/agent-sdk does this automatically) and retries.
3. We verify & settle through the fourotwo facilitator and return the data with a signed receipt.

The easy way - the agent SDK

import { fourotwoAgent } from '@fourotwo/agent-sdk';

const agent = new fourotwoAgent({
  privateKeyHex: process.env.FOUROTWO_PRIVATE_KEY,
  budget: { perRequestTokens: 5 },
});

// 402 is handled transparently - you just get the data
const res  = await agent.fetch('/api/assets/RE-NYC-001');
const data = await res.json();

The raw way - any HTTP client

# 1) unpaid → 402 + PAYMENT-REQUIRED header
curl -i /api/assets/RE-NYC-001

# 2) retry with the signed headers your agent produced
curl /api/assets/RE-NYC-001 \
  -H "PAYMENT-REQUIRED: <encoded terms>" \
  -H "PAYMENT-SIGNATURE: <signed envelope>" \
  -H "X-FOUROTWO-DID: did:fourotwo:casper:<hash>"