# Pet Care Calc – Daily Energy Requirement (DER)

> Pet Care Calc – Daily Energy Requirement (DER) is a paid API for AI agents from pet-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).

Calculates daily caloric needs (DER) for a dog or cat based on species, body weight, and life stage, returning kcal/day with treat allowance and meal breakdowns.

## Facts

- Endpoint: GET https://pet-calc.x402tookit.com/daily-energy?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/pet-care-calc-daily-energy-requirement-der-c88c5ede
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_73Q4MCD-Iy1UCe_wMWn3q

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 pet-care-calc-daily-energy-requirement-der-c88c5ede
```

Example prompt: How many calories should my neutered adult Labrador eat per day? He weighs 32 kg.

## When to prefer this

Use this endpoint when you need a structured, formula-based daily caloric recommendation for a dog or cat that accounts for life stage (including weight loss, working, and puppy/kitten stages) and returns a breakdown with treat allowance and meal kcal — rather than a generic pet nutrition article or food-bag feeding guide.

## Known failure modes

- Missing required 'species' or 'weight' query parameters returns an error
- Invalid species value (not 'dog' or 'cat') causes a validation failure
- Negative or zero weight returns an error or nonsensical result
- Invalid lifeStage enum value may fall back to default 'neutered-adult' or return an error
- Payment failure (x402) blocks the request entirely

## How this service works

Daily calories for a dog or cat from weight, species and life stage (neutered adult, weight loss, working, young).

## Output

Returns the daily energy requirement (DER) in kcal/day, the underlying resting energy requirement (RER), the life stage multiplier factor, a treat allowance in kcal, meal kcal after accounting for treats, a ±20% recommended range, a plain-language summary, source reference, and a veterinary disclaimer. May also include degraded-mode flags if data quality is limited.

## 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": [
      "species",
      "weight"
     ],
     "properties": {
      "unit": {
       "type": "string",
       "description": "kg (default) or lb"
      },
      "weight": {
       "type": "number",
       "description": "Body weight (the ideal or target weight for weight loss)"
      },
      "species": {
       "type": "string",
       "description": "dog or cat"
      },
      "lifeStage": {
       "type": "string",
       "description": "neutered-adult (default), intact-adult, weight-loss, inactive, light-work, puppy-kitten-young (under 4 months) or puppy-kitten-older"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "factor": {
       "type": [
        "null",
        "number"
       ]
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "species": {
       "type": [
        "null",
        "string"
       ]
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "degraded": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "weightKg": {
       "type": [
        "null",
        "number"
       ]
      },
      "lifeStage": {
       "type": [
        "null",
        "string"
       ]
      },
      "disclaimer": {
       "type": [
        "null",
        "string"
       ]
      },
      "notChecked": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "derKcalPerDay": {
       "type": [
        "null",
        "number"

… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/pet-care-calc-daily-energy-requirement-der-c88c5ede/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from pet-calc.x402tookit.com](https://www.zero.xyz/host/pet-calc.x402tookit.com/llms.txt)