Commerce Product Price

{
  "data": {
    "decision": {
      "atOrBelowMaximum": true,
      "currencyMatches": true,
      "expectedCurrency": "GBP",
      "maximumPrice": "49.99"
    },
    "evidence": {
      "bodySha256": "cb3ea11bc412c1e212e47c1d236b8c4c8d190b554c08761429020dd9d8d975ef",
      "independentlyVerified": false,
      "jsonLdSha256": "84c063239757d813c922ffe2ec6d470bb17164d3682d6ba197e44a58617113b5",
      "method": "publisher-supplied Schema.org Product JSON-LD in initial HTML",
      "publisherAsserted": true
    },
    "headlineOffer": {
      "amount": "39.99",
      "currency": "GBP",
      "offerIndex": 0,
      "priceKind": "direct",
      "productIndex": 0
    },
    "limitations": [
      "Prices, sellers, and availability are publisher assertions observed at fetch ...",
      "Taxes, delivery charges, account-specific discounts, location, variants, and ...",
      "Only initial-HTML Schema.org JSON-LD, Schema.org microdata, or paired product...",
      "Amazon URLs are excluded unless API Acre obtains express rights to return Ama...",
      "This is a current snapshot, not a price-history or lowest-market-price claim."
    ],
    "observedAt": "2026-08-18T08:35:02+00:00",
    "offerCount": 1,
    "productCount": 1,
    "products": [
      {
        "description": "A synthetic variable-temperature kettle for deterministic API validation.",
        "id": "https://apiacre.com/examples/product-price-fixture#product",
        "index": 0,
        "name": "API Acre Canary Kettle",
        "url": null
      }
    ],
    "requestedUrl": "https://apiacre.com/examples/product-price-fixture",
    "url": "https://apiacre.com/examples/product-price-fixture",
    "warnings": []
  },
  "meta": {
    "cached": false,
    "duration_ms": 42,
    "next_actions": [],
    "sources": [],
    "warnings": []
  },
  "request_id": "018f1f54-7f38-7ba2-8dc3-5f90272d9f1a",
  "service": "commerce.product-price",
  "version": "1"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://apiacre.com/v1/commerce/product-price' \
  -H 'content-type: application/json' \
  --data-raw '{"expected_currency":"GBP","maximum_price":"49.99","url":"https://apiacre.com/examples/product-price-fixture"}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://apiacre.com/v1/commerce/product-price' \
  -H 'content-type: application/json' \
  --data-raw '{"expected_currency":"GBP","maximum_price":"49.99","url":"https://apiacre.com/examples/product-price-fixture"}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapiacre.com%2Fv1%2Fcommerce%2Fproduct-price&method=POST
const res = await pay("https://apiacre.com/v1/commerce/product-price", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "expected_currency": "GBP",
    "maximum_price": "49.99",
    "url": "https://apiacre.com/examples/product-price-fixture"
  }),
});
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://apiacre.com/v1/commerce/product-price",
        json={
            "expected_currency": "GBP",
            "maximum_price": "49.99",
            "url": "https://apiacre.com/examples/product-price-fixture",
        },
    )
    print(res.status_code, res.text)