# ApexAPI Weight Converter

> ApexAPI Weight Converter is a paid API for AI agents from apex-api-gamma.vercel.app, paid per call via x402, $0.07817/call, status unknown (last checked 2026-10-10).

Converts weight values between different units of measurement (e.g. kg, lbs, oz, grams, stones)

## Facts

- Endpoint: POST https://apex-api-gamma.vercel.app/api/tools/convert/weight?utm_source=zero.xyz
- Price: $0.07817/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/apexapi-weight-converter-a939e94f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nk4DW8sxVTm-DrGbri6WX

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 apexapi-weight-converter-a939e94f -d '<json body>'
```

Example prompt: Convert 185 pounds to kilograms for me.

## When to prefer this

Use this endpoint when an AI agent needs programmatic weight unit conversion without relying on a built-in calculator, or when converting between obscure units (e.g. stone, troy ounce) that a generic LLM may not handle accurately. Suitable for health, fitness, shipping, cooking, and scientific use cases requiring reliable numeric conversions paid per-call without API key management.

## Known failure modes

- Invalid or unrecognized unit names return an error response
- Missing value or query string returns a 400 bad request
- Unsupported unit pair may return null or empty result
- Very large or very small numbers may lose precision
- Payment failure in USDC returns 402 Payment Required

## How this service works

Crypto, AI, Social Media, Finance, Weather, Tools &amp; more. Pay per call in USDC on Base. No API keys.

## Output

Returns the converted weight value in the target unit, along with the original input value and units, as a JSON object.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "query": {
   "type": "string",
   "description": "Search query or input parameter"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "description": "API response data"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/apexapi-weight-converter-a939e94f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from apex-api-gamma.vercel.app](https://www.zero.xyz/host/apex-api-gamma.vercel.app/llms.txt)