Developer Tool · x402 · early usage

One substance, with the cross-axis derivation: what every other jurisdiction (JP, EU, U…

One substance, with the cross-axis derivation: what every other jurisdiction (JP, EU, US, Codex, IARC, JECFA, EFSA) says about it, with per-cell sources, kept separate from what was derived

by api.additiveatlas.monon.space · discovered, not yet claimed by its owner · updated 2026-10-01

30d calls3

30d payers1

MethodGET

Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

One substance, with the cross-axis derivation: what every other jurisdiction (JP, EU, US, Codex, IARC, JECFA, EFSA) says about it, with per-cell sources, kept separate from what was derived

Tags: food-additives · regulation · labelling · eu · japan · bazaar

Call contract

Method: GET
Input: query parameters
Output: json
Last paid call: 2026-10-01

Input example from Bazaar metadata

{}

Output example

{
  "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"
    ]
  }
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/36606.json for the price and payment options.
Pay. Call GET https://api.additiveatlas.monon.space/v1/substances/:id/diff. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.01 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base
Demand: 3 calls · 1 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.01	0x6fFF720533330Bf937130F5542511754258d88DA	300s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x6fFF720533330Bf937130F5542511754258d88DA",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "amountUsd": 0.01,
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "description": "What every other jurisdiction says about the substance (primary, with per-cell sources) kept separate from what was derived (derived: status, coverage, confidence); refusal when nothing can be concluded. Full response shape and vocabulary: /openapi.yaml on this host. Every record is a draft and needs verification; not a safety judgement.",
      "properties": {
        "meta": {
          "type": "object"
        },
        "substance": {
          "type": "object"
        }
      },
      "required": [
        "substance",
        "meta"
      ],
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

Example shape — generated from the schema, not a captured live response

{
  "example": {
    "meta": {},
    "substance": {}
  },
  "type": "string"
}

Examples

curl

curl "https://api.additiveatlas.monon.space/v1/substances/:id/diff"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://api.additiveatlas.monon.space/v1/substances/:id/diff");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://api.additiveatlas.monon.space/v1/substances/:id/diff")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: api.additiveatlas.monon.space
Endpoint: https://api.additiveatlas.monon.space/v1/substances/:id/diff
Machine-readable: /resources/36606.json