Substances Diff

{
  "meta": {
    "disclaimer": {
      "en": "Every record is a draft and needs verification. This is not a safety judgement: it returns what each jurisdiction has officially decided, the differences between them, and the sources.",
      "ja": "全件ドラフト＝要検証。安全/危険の判定ではなく、各法域の公的判断の差分と根拠を返す。"
    },
    "last_verified": "2026-09-24",
    "sources": "/v1/sources"
  },
  "substance": {
    "axes": [
      {
        "axis": "EU",
        "derived": {
          "confidence": "medium",
          "coverage": "partner_broader",
          "qualifiers": [],
          "reason": "JP カラギナン(No.59)は精製+半精製(加工ユーケマ藻類=別添の類別名)を覆い、EU は E407/E407a に分ける。ただし E407 の規格(Reg 231/2012)はフルセランも含み、JP はそれを別品目 No.231 ファーセレランに立てる(名簿定義の基原5種にフルセラリアは無い)ため除外=JP カラギナン = (E407 ∪ E407a) − ファーセレラン",
          "status": "permitted"
        },
        "primary": {
          "nodes": [
            {
              "category": "listed",
              "id": "eu:e407",
              "name": "Carrageenan",
              "source": {
                "id": "eu-additives",
                "name": "EU Union list of food additives — Reg (EC) No 1333/2008 Annex II Part B (consolidated)",
                "retrieved_date": "2026-08-12",
                "version": "Consolidated text of 2026-08-18"
              }
            },
            {
              "category": "listed",
              "id": "eu:e407a",
              "name": "Processed euchema seaweed",
              "source": {
                "id": "eu-additives",
                "name": "EU Union list of food additives — Reg (EC) No 1333/2008 Annex II Part B (consolidated)",
                "retrieved_date": "2026-08-12",
                "version": "Consolidated text of 2026-08-18"
              }
            }
          ]
        }
      }
    ],
    "axis": "JP",
    "axis_category": "既存",
    "id": "jp:existing-carrageenan",
    "is_group": false,
    "name": "カラギナン",
    "translations": {},
    "use_category": [
      "増粘安定剤"
    ]
  }
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.additiveatlas.monon.space/v1/substances/:id/diff'

# 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://api.additiveatlas.monon.space/v1/substances/:id/diff' \
  | 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%2Fapi.additiveatlas.monon.space%2Fv1%2Fsubstances%2F%3Aid%2Fdiff
const res = await pay("https://api.additiveatlas.monon.space/v1/substances/:id/diff");
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.get("https://api.additiveatlas.monon.space/v1/substances/:id/diff")
    print(res.status_code, res.text)