Resolve a food product barcode (UPC, EAN-13, EAN-8, etc.) to structured product metadata via Open Food Facts — the CC0 community-maintained database of >3M food products. Returns product name, brand, ingredient list, allergens, nutriments (per-100g + per-serving), Nutri-Score grade (a-e), NOVA processing classification (1-4), Eco-Score, categories, manufacturing origin, packaging, and product image URLs.
/api/food/barcode-lookupPAYMENT-SIGNATURE.The barcode lookup API is a pay-per-call food endpoint built for AI agents and autonomous software. Resolve a food product barcode (UPC, EAN-13, EAN-8, etc.) to structured product metadata via Open Food Facts — the CC0 community-maintained database of >3M food products.
There is no signup and no API key. An agent (or any HTTP client) hits the endpoint, receives an x402 "402 Payment Required" challenge, signs a sub-cent USDC payment on Base or Solana, and retries — the data comes back on the paid request. That makes it a drop-in barcode lookup data source for an agent tool-use loop, an MCP host, or a backend that needs food data on demand without onboarding to yet another vendor portal.
| Name | Type | Description |
|---|---|---|
barcoderequired | string | match ^[0-9]{6,14}$ |
# 1. Probe with no auth → 402 envelope with PaymentRequirements curl -sS 'https://2s.io/api/food/barcode-lookup?barcode=12345678' # 2. Sign + retry with PAYMENT-SIGNATURE: curl -sS 'https://2s.io/api/food/barcode-lookup?barcode=12345678' \ -H 'PAYMENT-SIGNATURE: <base64-json-payload>' # Or use the canonical runner (handles probe → sign → retry): # EVM_PRIVATE_KEY=0x... node --env-file=.env.local \ # --experimental-strip-types scripts/x402-pay.ts \ # 'https://2s.io/api/food/barcode-lookup?barcode=12345678'
import { TwoS } from '@2sio/sdk'
const client = new TwoS({
privateKey: process.env.EVM_PRIVATE_KEY as `0x${string}`,
})
const result = await client.food.barcodeLookup({
"barcode": "12345678"
})
console.log('endpoint:', result.endpoint)
console.log('cost:', result.costUsd, 'USDC')
console.log('tx:', result.settlement?.txHash)
console.log('data:', result.data)import os
from twosio import TwoS
client = TwoS(private_key=os.environ["EVM_PRIVATE_KEY"])
result = client.food.barcode_lookup(barcode="12345678")
print("endpoint:", result.endpoint)
print("cost:", result.cost_usd, "USDC")
print("tx:", (result.settlement or {}).get("tx_hash"))
print("data:", result.data)// 1. Add @2sio/mcp to your MCP host config (Claude Desktop example below).
// EVM_PRIVATE_KEY funds x402 payments per call.
// claude_desktop_config.json
{
"mcpServers": {
"2sio": {
"command": "npx",
"args": ["-y", "@2sio/mcp"],
"env": { "EVM_PRIVATE_KEY": "0x..." }
}
}
}
// 2. Once the server is running, agents call this tool via standard MCP:
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/call",
"params": {
"name": "food.barcode-lookup",
"arguments": {
"barcode": "12345678"
}
}
}| Field | Type | Description |
|---|---|---|
ok | boolean | one of: true |
items | array | |
total | integer | Total matching rows upstream; null when unknown. |
source | object | |
meta | object |
{
"ok": true,
"items": [
{
"barcode": "example",
"name": "example",
"brands": "example",
"categories": [
"example"
],
"quantity": "example",
"servingSize": "example",
"ingredientsText": "example",
"allergens": [
"example"
],
"imageUrl": "example",
"nutriscoreGrade": "example",
"novaGroup": 1,
"ecoscoreGrade": "example",
"nutrientLevels": {},
"nutriments": {},
"countries": [
"example"
],
"labels": [
"example"
],
"manufacturingPlaces": "example",
"origins": "example",
"packaging": [
"example"
]
}
],
"total": 1,
"source": {
"provider": "example",
"url": "example",
"license": "example"
},
"meta": {
"found": false
}
}