Food Allergens

{
  "asOf": "2026-10-11T05:19:23.743Z",
  "attribution": "Data: Open Food Facts contributors (ODbL).",
  "barcode": "3017620422003",
  "brands": "Nutella, Ferrero",
  "checkedAgainst": [
    "milk",
    "gluten"
  ],
  "containsFromYourList": [
    "milk"
  ],
  "dataQuality": {
    "completeness": 89,
    "hasIngredients": true,
    "lastModified": "2026-10-10"
  },
  "declaredAllergens": [
    "milk",
    "nuts",
    "…1 more"
  ],
  "degraded": false,
  "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
  "ingredients": "Sucre, huile de palme, NOISETTES 13%, cacao maigre 7,4%, LAIT écrémé en poudre 6,6%, LACTOSERUM en poudre, émulsifiants: lécithines [SOJA), vanilline. Sans gluten.",
  "name": "Nutella",
  "notChecked": [
    "cross-contamination in the factory beyond declared traces",
    "recipe changes since the database entry",
    "…2 more"
  ],
  "quantity": "400 g e",
  "reasons": [
    "Matches come from the declared allergen tags.",
    "Data: Open Food Facts contributors (ODbL)."
  ],
  "source": "Open Food Facts",
  "sourceUrl": "https://world.openfoodfacts.org",
  "summary": "Nutella: declared allergens milk, nuts, soybeans. Your list: CONTAINS milk.",
  "traces": [],
  "tracesFromYourList": [],
  "verdict": "CONTAINS_AVOIDED_ALLERGEN"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://food-barcode.x402tookit.com/food-allergens?avoid=milk%2Cgluten&barcode=3017620422003'

# 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 - 'https://food-barcode.x402tookit.com/food-allergens?avoid=milk%2Cgluten&barcode=3017620422003' \
  | 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 $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
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 $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ffood-barcode.x402tookit.com%2Ffood-allergens
const res = await pay("https://food-barcode.x402tookit.com/food-allergens?avoid=milk%2Cgluten&barcode=3017620422003");
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 $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://food-barcode.x402tookit.com/food-allergens?avoid=milk%2Cgluten&barcode=3017620422003")
    print(res.status_code, res.text)