# Carats to Stones Mass Converter

> Carats to Stones Mass Converter is a paid API for AI agents from agent402.tools, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Converts a numeric mass value from carats to stones via a simple GET request with a query parameter.

## Facts

- Endpoint: GET https://agent402.tools/api/convert/carats-to-stones
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/carats-to-stones-mass-converter-7d282019
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QOFldWkR3aqCz9JQLdGGc

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 carats-to-stones-mass-converter-7d282019
```

Example prompt: How many stones is 2500 carats? Can you convert that mass for me?

## When to prefer this

Use this endpoint when you need a quick, programmatic unit conversion from carats to stones — especially in workflows involving gemstone weights, jewelry mass calculations, or any context where imperial stone units are required from a carat input.

## Known failure modes

- Missing required 'value' query parameter returns an error
- Non-numeric value passed causes parsing failure
- Very large or very small numbers may cause precision issues
- Payment not processed (402 response) if USDC microtransaction not completed

## How this service works

Convert carats to stones (mass). Pass ?value=N.

## Output

Returns the converted mass value expressed in stones, corresponding to the input value provided in carats.

## 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": [
      "value"
     ],
     "properties": {
      "value": {
       "type": "string",
       "description": "Numeric value to convert"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/carats-to-stones-mass-converter-7d282019/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent402.tools](https://www.zero.xyz/host/agent402.tools/llms.txt)