# USDA Egg Size Converter & Weight Reference

> USDA Egg Size Converter & Weight Reference is a paid API for AI agents from cooking-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).

Returns USDA egg size weights and calculates how many eggs of one size substitute for a recipe's specified count in another size.

## Facts

- Endpoint: GET https://cooking-calc.x402tookit.com/egg-sizes?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/usda-egg-size-converter-weight-reference-7cd494a2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0-y4JFGLu3_Hv6k0rgzC8

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 usda-egg-size-converter-weight-reference-7cd494a2
```

Example prompt: My recipe calls for 3 large eggs but I only have medium ones — how many medium eggs do I need to use instead?

## When to prefer this

Use this endpoint when a user needs to substitute one USDA egg size for another in a recipe, or wants authoritative weight data (grams/ounces) per egg size. It is the right choice for baking-accuracy use cases where the weight difference between egg sizes matters. Prefer it over a generic knowledge-base lookup when you need a precise rounded egg count substitution backed by official USDA standards.

## Known failure modes

- Invalid size enum value returns an error — must be one of: jumbo, extra-large, large, medium, small, peewee
- count out of range (below 0.5 or above 100) returns a validation error
- If the data source is unavailable, response may be degraded (degraded: true) with partial data
- Same size for both 'size' and 'toSize' returns a 1:1 equivalent trivially

## How this service works

USDA egg sizes: weight per egg, and how many eggs of one size equal a recipe's count in another (for example mediums for large).

## Output

Returns a full USDA egg size reference table (size name, minimum grams per egg, minimum ounces per egg, minimum ounces per dozen, equivalent large egg count per size), plus a specific conversion result showing how many eggs of your available size replace the recipe's count in its called-for size, with exact and rounded equivalent counts, total in-shell grams, approximate edible grams, a plain-English summary, and the USDA data source and date.

## 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": [],
     "properties": {
      "size": {
       "type": "string",
       "description": "Size the recipe calls for: jumbo, extra-large, large (default), medium, small or peewee"
      },
      "count": {
       "type": "number",
       "description": "Number of eggs in the recipe, 0.5 to 100 (default 1)"
      },
      "toSize": {
       "type": "string",
       "description": "Size you have (default medium)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "count": {
       "type": [
        "null",
        "number"
       ]
      },
      "table": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "object",
        "properties": {
         "size": {
          "type": [
           "null",
           "string"
          ]
         },
         "minimumGramsPerEgg": {
          "type": [
           "null",
           "number"
          ]
         },
         "equivalentLargeEggs": {
          "type": [
           "null",
           "number"
          ]
         },
         "minimumOuncesPerEgg": {
          "type": [
           "null",
           "number"
          ]
         },
         "minimumOuncesPerDozen": {
          "type": [
           "null",
           "number"
          ]
         }
        }
       }
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "degraded": {
       "type": [
        "boolean",
        "null"
       ]
      
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/usda-egg-size-converter-weight-reference-7cd494a2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from cooking-calc.x402tookit.com](https://www.zero.xyz/host/cooking-calc.x402tookit.com/llms.txt)