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Synapse Unit Converter
x402
Synapse Unit Converter is a paid API for AI agents from anibalb.duckdns.org, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-31).
Converts a numeric value from one unit of measurement to another across categories like length, weight, and temperature
Price / call$0.002
Success—
StatusUnknown
How this service works
Public data and utility APIs paid per call in USDC on Base (x402). No accounts, no API keys. 174 routes: crypto/equity data, onchain reads, DNS/email/security intel, geo/weather, x402 payment diagnostics, dev utilities and more.
Output
Returns a JSON object containing the source unit, target unit, the original numeric value, the converted result, and the measurement category (e.g. length, mass).
Example use cases
Road distance unit conversion
“I have a distance of 100 km — can you convert that to miles for me?”
Cooking recipe measurement swap
“A recipe calls for 500 grams of flour but I only have a pound scale — how many pounds is that?”
Scientific length unit translation
“Convert 1500 millimeters to feet so I can compare it to my measurements.”
Technical details
Endpoint
GEThttps://anibalb.duckdns.org/x402/unit-convert?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, pay-per-call unit conversion without setting up an account or API key, especially in agent workflows already using the x402 micropayment protocol on Base. It is ideal for converting common measurement units (length, mass, temperature, volume) programmatically within automated pipelines.
Side effects
- Unsupported unit pairing returns an error or empty result
- Missing required 'from', 'to', or 'value' query parameters cause a 400-level error
- Incompatible unit categories (e.g. converting km to kg) return an error
- Payment failure via x402 protocol returns a 402 Payment Required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"to": "mi",
"from": "km",
"value": 100,
"result": 62.1371,
"category": "length"
}
}Tags
x402
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