FirstMention AgentKit Unit Converter

x402

FirstMention AgentKit Unit Converter is a paid API for AI agents from api.firstmention.uk, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-29).

Converts a numeric value from one unit to another (length, weight, temperature, storage, currency, etc.) and returns the converted result

Price / call$0.01

Seller volume →—

Success—

StatusUnknown

How this service works

Pay-per-call HTTP APIs, paid with x402 in USDC on Base (eip155:8453): agentkit, api-change-check, basedue, basewatch, chainread, check-sanctions, chgwatch, company-facts, composite, edgar, feednews, pageaudit, solcheck, token-dd, txpreflight, walletcheck, webmd, webread, websearch, x402index. Each operation describes its service.

Output

A JSON object containing the source unit, target unit, original value, converted result, unit family (e.g. 'length', 'temperature'), and the rounding precision used.

Example use cases

Temperature unit conversion for weather data

“Convert 98.6 degrees Fahrenheit to Celsius, rounded to 2 decimal places.”

Bulk distance conversion for route planning

“I have these distances in kilometers: 5, 10, 21.1, 42.2 — convert all of them to miles, rounded to 3 decimal places.”

Data storage size normalization

“How many GB is 512000 MB? Round to 6 decimal places.”

Technical details

Endpoint

POSThttps://api.firstmention.uk/s/agentkit/validate?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need a pay-per-call, programmatic unit conversion with precise decimal control, especially within an x402/USDC-payment-enabled agentic workflow on Base. It supports a broad family of unit types (length, weight, temperature, storage, currency) and handles batch value conversion in a single call.

Side effects

Unknown or unsupported unit strings cause an error response
Attempting to convert between incompatible unit families (e.g. kg to miles) returns an error
Missing required 'value' or 'from' field causes a 400-style error
Payment not included or insufficient USDC results in 402 Payment Required
Malformed JSON body returns a parse error

Input

Schema · Request body

Field	Type	Description
to	string	Target unit; omit to get all equivalents in the same family
from	string	Source unit, e.g. km, kg, F, GB, USD, Km
round	integer	Decimal places (default 6)
value	number	Amount to convert
values	array	Optional list of values instead of a single value

Output

Schema · Response

{
  "type": "json",
  "example": {
    "to": "mi",
    "from": "km",
    "round": 6,
    "value": 100,
    "family": "length",
    "result": 62.137119
  }
}

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