Welcome to PAID

PAID is the payment intelligence and orchestration platform for the agentic economy, with a cryptographically auditable ledger. These docs walk you from your first API call to a production checkout — typically in under five minutes.

What you can do with PAID

• Accept cards, ACH, and stablecoin (USDC) on the same checkout.
• Embed a drop-in payment button on any site or app.
• Receive signed webhooks on every state change.
• Reconcile automatically against a cryptographically chained ledger.
• Surface tenant attestation receipts via Trust Fabric.

Your first call

Create a checkout session and redirect the customer to the returned URL. PAID hosts the checkout page; you never touch card data.

curl https://api.trustfabric.ai/v1/checkout/sessions \
  -H "Authorization: Bearer $PAID_SECRET_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: order-1234" \
  -d '{
    "mode": "payment",
    "currency": "USD",
    "payment_method_types": ["card"],
    "line_items": [{
      "ad_hoc": {"amount": 4999, "currency": "USD", "description": "Pro plan"},
      "quantity": 1
    }],
    "success_url": "https://example.com/thanks",
    "cancel_url": "https://example.com/cancel"
  }'

Next steps

• Quickstart — end-to-end walkthrough.
• Embed snippet — one-line drop-in checkout button.
• Webhooks — verify, react, retry.
• API reference — full endpoint catalog.