Buy a prepaid credit voucher in ONE on-chain settlement, then spend it across every paid p

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x5D17c40FD6b119dc6006C4Ab3C20a917FCaB2aCD",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "500000",
    "maxTimeoutSeconds": 60
  },
  {
    "scheme": "exact",
    "network": "animica:1",
    "payTo": "anim1zqpsmegc0qcvzjfukm89xs0zeu3eqyyyel7kelehuszvwfarqypky2gr946ga",
    "asset": "ANM",
    "amount": "4864444156181",
    "maxTimeoutSeconds": 60
  }
]

{
  "animica": {
    "catalog": "https://animica.dev/.well-known/x402",
    "content_type": "application/json",
    "currency": "USDC",
    "description": "Buy a prepaid credit voucher in ONE on-chain settlement, then spend it across every paid product on this gateway with no further settlement and no gas. Send the returned token as \"X-Animica-Credits: anmc_...\" (or \"Authorization: Bearer anmc_...\") on any paid route and the call is served from the balance instead of a payment. Credit is granted at face value plus 10% — that bonus is the Base settlement gas we do not spend on your calls 2..N, returned to you. The voucher is a BEARER secret shown exactly once and stored only as its SHA-256 hash: anyone holding it can spend it, and we cannot recover it for you. Balance and full spend history are readable for free at GET /x402/credits/balance with the token. Unused credit expires 365 days after purchase. Send the token on THIS route to top up an existing voucher instead of minting a new one.",
    "documentation": "https://animica.dev/x402#product-credits_buy",
    "name": "Prepaid call credits",
    "openapi": "https://animica.dev/x402/openapi.json",
    "price": "0.50",
    "product": "credits_buy",
    "provider": "Animica",
    "terms": {
      "amount_atomic": "500000",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "chain_id": 8453,
      "network": "eip155:8453",
      "pay_to": "0x5D17c40FD6b119dc6006C4Ab3C20a917FCaB2aCD",
      "scheme": "exact"
    },
    "x402_version": 2
  },
  "bazaar": {
    "discoverable": true,
    "info": {
      "input": {
        "method": "POST",
        "type": "http"
      },
      "output": {
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "properties": {
            "body": {
              "properties": {
                "label": {
                  "description": "optional free-text label (<=64 chars) returned with your balance, so an agent can tell its own vouchers apart",
                  "type": "string"
                }
              },
              "type": "object"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {},
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  },
  "discovery": {
    "discoverable": true,
    "info": {
      "input": {
        "bodyFields": {
          "label": {
            "description": "optional free-text label (<=64 chars) returned with your balance, so an agent can tell its own vouchers apart",
            "required": false,
            "type": "string"
          }
        },
        "bodyType": "json",
        "headers": {
          "X-Animica-Credits": {
            "description": "an existing anmc_ token — when present the purchase TOPS UP that voucher and no new token is minted",
            "required": false
          }
        },
        "method": "POST",
        "type": "http"
      },
      "output": {
        "description": "voucher {token (shown ONCE, only on a new mint), voucher_id, balance_atomic, balance_usdc, bonus_atomic, expires_at}, how_to_use, and payment metadata",
        "type": "json"
      }
    }
  }
}

curl "https://animica.dev/x402/credits/buy"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://animica.dev/x402/credits/buy");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

import httpx
res = httpx.get("https://animica.dev/x402/credits/buy")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header