# Services from pet-calc.x402tookit.com on Zero

> pet-calc.x402tookit.com serves 8 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/pet-calc.x402tookit.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/pet-calc.x402tookit.com/health.json

## Services

- [Pet Care Calc – Aquarium Volume Calculator](https://www.zero.xyz/c/pet-care-calc-aquarium-volume-calculator-214bddd7/llms.txt): $0.02/call via x402. Calculates aquarium gross volume in US gallons and litres from inside tank dimensions, usable water volume after substrate/decor, and total water weight.
- [Pet Care Calc – Food Portion Calculator](https://www.zero.xyz/c/pet-care-calc-food-portion-calculator-fa31822a/llms.txt): $0.02/call via x402. Calculates daily and per-meal pet food portions in grams, cups, and ounces from daily calorie needs and food energy density, with a configurable treat allowance.
- [Pet Care Calc – Aquarium Water Change Nitrate Calculator](https://www.zero.xyz/c/pet-care-calc-aquarium-water-change-nitrate-calculator-4ac36ea5/llms.txt): $0.02/call via x402. Calculates nitrate concentration remaining after partial water changes, how many changes are needed to reach a target PPM, and the volume of water exchanged per change.
- [Pet Care Calc – Daily Energy Requirement (DER)](https://www.zero.xyz/c/pet-care-calc-daily-energy-requirement-der-c88c5ede/llms.txt): $0.02/call via x402. 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.
- [Pet Care Calc – Resting Energy Requirement (RER)](https://www.zero.xyz/c/pet-care-calc-resting-energy-requirement-rer-0ab14cb2/llms.txt): $0.02/call via x402. 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.
- [Pet Care Calc – Ideal Weight from Body Condition Score](https://www.zero.xyz/c/pet-care-calc-ideal-weight-from-body-condition-score-8a3df7ff/llms.txt): $0.02/call via x402. Estimates a dog's or cat's ideal weight from their current weight and a 1-9 body condition score, calculating how much weight to lose and a timeline for safe loss.
- [Pet Care Calc – Dog Human Age (AVMA & Epigenetic)](https://www.zero.xyz/c/pet-care-calc-dog-human-age-avma-epigenetic-981aa521/llms.txt): $0.02/call via x402. Converts a dog's age in calendar years to human-equivalent ages using both the AVMA 15-9-5 rule and the 2020 epigenetic-clock formula (16 ln(age) + 31)
- [Pet Care Calc – Feeding Schedule](https://www.zero.xyz/c/pet-care-calc-feeding-schedule-7cfe5907/llms.txt): $0.02/call via x402. Splits a pet's daily food amount into evenly spaced meals between a first and last feeding time, returning per-meal portions and 12-hour clock times.

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

- [Zero catalog index](https://www.zero.xyz/llms.txt)