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Pet Care Calc – Resting Energy Requirement (RER)
x402
Pet Care Calc – Resting Energy Requirement (RER) 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 the resting energy requirement (RER) in kcal/day for a dog or cat from body weight using the formula 70 × kg^0.75 and the linear shortcut approximation.
Price / call$0.02
Success—
StatusUnknown
How this service works
Resting energy requirement (RER) in kcal/day for a dog or cat from body weight, using 70 x kg^0.75 and the linear shortcut.
Output
Returns the pet's weight in both kg and lb, the RER calculated via 70 × kg^0.75 in both kcal/day and kJ/day, the linear shortcut RER in kcal/day, a boolean flag indicating whether the linear shortcut is valid for the given weight, a disclaimer, and metadata including source and timestamp.
Example use cases
Weight loss diet planning for obese cat
“My cat weighs 7 kg but her ideal target weight is 5 kg — can you calculate the resting energy requirement at her target weight of 5 kg so I can plan her calorie-restricted diet?”
Veterinary nutrition baseline for a dog
“I need the resting energy requirement for a 30 lb dog to set a nutritional baseline — please compute the RER in kcal per day and tell me if the linear shortcut is valid at that weight.”
Post-surgery recovery calorie check
“My dog just had surgery and weighs 8 kg — what's his resting energy requirement in kcal per day so we can make sure he's getting enough calories to recover without overfeeding?”
Technical details
Endpoint
GEThttps://pet-calc.x402tookit.com/resting-energy?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a precise RER calculation using the veterinary standard 70 × kg^0.75 formula, especially when you also want the linear shortcut approximation and a validity flag for that shortcut. Prefer this over general calorie calculators when you need the basal metabolic floor (RER) rather than a life-stage-adjusted daily energy requirement (DER).
Side effects
- Missing required 'weight' query parameter returns an error
- Non-numeric weight value causes a validation failure
- Extremely low or zero weight values may produce nonsensical or invalid results
- Invalid unit value (not 'kg' or 'lb') may cause a processing error or default to kg
- Payment failure (x402) results in a 402 response before calculation occurs
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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