ToolVet
80trust / 100

Gtin Resolve

by handel.halowerk.com in Developer tools

x402 APIPassing, checked 57 min ago

Looks up a barcode number across Open Food Facts and a general product database, returning product name, brand, category, packaging, quantity and images where present. The check digit is computed locally before anything is queried: an invalid number is a typo, and reporting it as not found would send the caller looking in the wrong place.

POST
https://handel.halowerk.com/v1/gtin-resolve
Price
$0.005
per call in USDC
Uptime
100%
last 30 days
Response time
160 ms
234 ms slowest 5%
Last check
Passed
57 min ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed · Watch with other listings

How to call it

POST https://handel.halowerk.com/v1/gtin-resolve

Each call costs $0.005 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

POST https://handel.halowerk.com/v1/gtin-resolve
content-type: application/json

{
  "gtin": "4006381333931",
  "sources": [
    "openfoodfacts"
  ]
}

Parameters

ParameterTypeRequiredDescription
gtinstringYesEAN-8, EAN-13, UPC-A or GTIN-14.
skip_checksumbooleanNoQuery even when the check digit is wrong. Default: false.
sourcesarray of stringNoWhich sources to query. Both if omitted.

Example response

The listing has no example response.

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.005.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://handel.halowerk.com/v1/gtin-resolve' \
  -H 'content-type: application/json' \
  --data-raw '{"gtin":"4006381333931","sources":["openfoodfacts"]}'

# 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://handel.halowerk.com/v1/gtin-resolve' \
  -H 'content-type: application/json' \
  --data-raw '{"gtin":"4006381333931","sources":["openfoodfacts"]}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// 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 $0.005 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.005" });
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 $0.005 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fhandel.halowerk.com%2Fv1%2Fgtin-resolve&method=POST
const res = await pay("https://handel.halowerk.com/v1/gtin-resolve", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "gtin": "4006381333931",
    "sources": [
      "openfoodfacts"
    ]
  }),
});
console.log(res.status, await res.text());
Python: pay and call
# 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 $0.005 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.005"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://handel.halowerk.com/v1/gtin-resolve",
        json={
            "gtin": "4006381333931",
            "sources": [
                "openfoodfacts",
            ],
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

WhenResultHTTPTimePrice
57 min agoPassed402169 ms$0.005
5 h agoPassed40296 ms$0.005
10 h agoPassed402176 ms$0.005
14 h agoPassed402104 ms$0.005
18 h agoPassed402139 ms$0.005
Show 10 older checks
22 h agoPassed402151 ms$0.005
26 h agoPassed402105 ms$0.005
31 h agoPassed402136 ms$0.005
35 h agoPassed40229 ms$0.005
39 h agoPassed402160 ms$0.005
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2 days agoPassed402130 ms$0.005