# Food Barcode Facts – Food Additive Info by E-Number

> Food Barcode Facts – Food Additive Info by E-Number is a paid API for AI agents from food-barcode.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).

Returns the name, function, and reference summary for a food additive identified by its E-number (e.g. E102, E330, E621).

## Facts

- Endpoint: GET https://food-barcode.x402tookit.com/additive-info?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/food-barcode-facts-food-additive-info-by-e-number-2dbe2892
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_u9gX5ZT-Wo78abdLXXm3G

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability food-barcode-facts-food-additive-info-by-e-number-2dbe2892
```

Example prompt: What is food additive E621 — what's it called and what does it do in food products?

## When to prefer this

Use this endpoint when you need a quick reference lookup for a specific food additive by E-number — to identify its name and function as listed on food packaging. It is a reference tool, not a safety classifier, so prefer it when the goal is informational identification rather than dietary suitability or allergen checking (use sibling endpoints for those).

## Known failure modes

- Unknown or unsupported E-number returns a null or degraded result with exactMatch: false
- Missing 'code' query parameter results in a validation error
- Malformed E-number format (e.g. letters only, no digits) may return no match
- Service outage or payment failure (x402 protocol) may prevent response

## How this service works

Name and function of a common food additive by E-number (E102, E330, E621 and about 90 more); a reference, not a safety rating.

## Output

Returns a structured record including the E-number code, the common name of the additive, its functional category (e.g. colorant, preservative, emulsifier), a plain-language summary, a verdict field, a source reference, a disclaimer, a flag indicating whether the match was exact, and an asOf timestamp. Does not provide a safety rating.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "code"
     ],
     "properties": {
      "code": {
       "type": "string",
       "description": "E-number, e.g. E330 or 330"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "code": {
       "type": [
        "null",
        "string"
       ]
      },
      "name": {
       "type": [
        "null",
        "string"
       ]
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "degraded": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "function": {
       "type": [
        "null",
        "string"
       ]
      },
      "disclaimer": {
       "type": [
        "null",
        "string"
       ]
      },
      "exactMatch": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "notChecked": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/food-barcode-facts-food-additive-info-by-e-number-2dbe2892/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from food-barcode.x402tookit.com](https://www.zero.xyz/host/food-barcode.x402tookit.com/llms.txt)