# Pet Care Calc – Dog Human Age (AVMA & Epigenetic)

> Pet Care Calc – Dog Human Age (AVMA & Epigenetic) 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).

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)

## Facts

- Endpoint: GET https://pet-calc.x402tookit.com/dog-age?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-dog-human-age-avma-epigenetic-981aa521
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1ty6En1UnBg1GHqIlpSql

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-dog-human-age-avma-epigenetic-981aa521
```

Example prompt: My dog is 7 years old — can you tell me his human-equivalent age using both the AVMA 15-9-5 rule and the epigenetic clock formula?

## When to prefer this

Use this endpoint when you need a scientifically grounded dog-to-human age conversion that goes beyond the outdated 'multiply by 7' rule. It uniquely provides two distinct methods — the veterinary-standard AVMA 15-9-5 rule and the 2020 epigenetic-clock formula — along with a reliability flag and difference metric, making it ideal for any pet health, wellness, or educational application requiring rigorous age context.

## Known failure modes

- Missing dogYears query parameter returns a validation error
- Non-numeric or negative dogYears value causes a bad request error
- Very young or very old ages (e.g. 0 or >30) may trigger epigeneticReliable=false
- Payment failure (insufficient USDC balance or x402 protocol error) results in 402 response

## How this service works

Human-equivalent age of a dog by the AVMA 15-9-5 rule and the 2020 epigenetic-clock formula 16 ln(age) + 31.

## Output

Returns the dog's human-equivalent age calculated via the AVMA 15-9-5 rule (humanYearsAvma), the 2020 epigenetic-clock formula (humanYearsEpigenetic), the difference between the two estimates (differenceYears), a flag indicating whether the epigenetic formula is reliable for the given age (epigeneticReliable), a plain-English summary, source attribution, and a disclaimer about the estimates.

## 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": [
      "dogYears"
     ],
     "properties": {
      "dogYears": {
       "type": "number",
       "description": "The dog's age in calendar years (for example 7 or 2.5)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "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"
       ]
      },
      "dogYears": {
       "type": [
        "null",
        "number"
       ]
      },
      "disclaimer": {
       "type": [
        "null",
        "string"
       ]
      },
      "notChecked": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "humanYearsAvma": {
       "type": [
        "null",
        "number"
       ]
      },
      "differenceYears": {
       "type": [
        "null",
        "number"
       ]
      },
      "epigeneticReliable": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "humanYearsEpigenetic": {
       "type": [
        "null",
        "number"
       ]
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/pet-care-calc-dog-human-age-avma-epigenetic-981aa521/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)