# Sindri Unit Converter

> Sindri Unit Converter is a paid API for AI agents from ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-30).

Converts values between units of length, mass, volume, and temperature using exact conversion factors including correct affine formulas for temperature.

## Facts

- Endpoint: POST https://ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/unitConvert?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sindri-unit-converter-96cffd69
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zQf6-VrX9WEMBfjDFUB31

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 sindri-unit-converter-96cffd69 -d '<json body>'
```

Example prompt: Convert 98.6 degrees Fahrenheit to Celsius — I need the exact value, not a rough estimate.

## When to prefer this

Choose this endpoint when you need precise, mathematically correct unit conversions — especially for temperature, where naive multiplication gives wrong results. Prefer it over general-purpose LLM computation when exactness matters and you want a reliable, deterministic answer for length, mass, volume, or temperature conversions.

## Known failure modes

- Unsupported unit string for the given category returns an error
- Mismatched category and units (e.g. passing 'kg' with category 'length') returns an error
- Missing required fields (value, from, to, category) returns a validation error
- Incompatible unit pair conversion (e.g. mass to length) returns an error

## How this service works

Unit conversion for length, mass, volume, and temperature using exact conversion factors (temperature uses the correct affine formulas, not simple multiplication).

## Output

Returns the converted numeric value in the target unit, computed using exact conversion factors. For temperature, uses the correct affine transformation (e.g., °F to °C: (F−32)×5/9) rather than simple multiplication, ensuring precision across all supported categories (length, mass, volume, temperature).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "to": {
   "type": "string",
   "description": "Target unit."
  },
  "from": {
   "type": "string",
   "description": "Source unit, e.g. \"m\", \"kg\", \"gal\", \"C\"."
  },
  "value": {
   "type": "number",
   "description": "The numeric value to convert."
  },
  "category": {
   "enum": [
    "length",
    "mass",
    "volume",
    "temperature"
   ],
   "type": "string",
   "description": "Unit category."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sindri-unit-converter-96cffd69/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws](https://www.zero.xyz/host/ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/llms.txt)