AgentKit Unit Converter

x402

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, mass, temperature, digital storage, currency, etc.) or returns all equivalents in the same unit family

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

Returns a JSON object with the converted result (or array of results), the source and target units, the unit family (e.g. 'length', 'mass', 'temperature'), and the rounding precision applied.

Example use cases

Distance unit conversion for travel

“How many miles is 250 kilometers? Round to 2 decimal places.”

Temperature conversion for weather data

“Convert 37 degrees Celsius to Fahrenheit, rounded to 1 decimal place.”

Batch weight conversion for product catalog

“Convert these weights from kilograms to pounds, rounded to 3 decimal places: 0.5, 1.2, 2.8, 5.0.”

Technical details

Endpoint

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

When to prefer

Choose this endpoint when an AI agent needs fast, precise unit conversion across a broad range of physical and digital measurement families, paid per-call via x402 USDC micropayment. Prefer over free alternatives when operating in a crypto-native agent stack already using x402 for other firstmention.uk services, or when batch conversion of multiple values in a single call is needed.

Side effects

Unknown or unsupported unit — returns error if 'from' or 'to' unit string is not recognized
Incompatible unit family — error if converting between units from different families (e.g. kg to km)
Missing required 'value' or 'values' field — returns validation error
Payment not fulfilled — x402 payment in USDC required before response is returned
Invalid 'round' type — non-integer decimal places parameter causes a 400 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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