18 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.
Convert between units of length, mass, volume (incl. US cups and gallons), temperature (c, f, k), speed, area, data size (kB vs KiB), time, energy and pressure. Example units: km, mi, lb, kg, floz, ml, mph, kn, acre, gib...
Convert a weight/mass value between units (kg, g, lb, oz, stone, tonne, and more).
EVM developer utilities: keccak256 hash, function selector from a signature, EIP-55 checksum address and wei/gwei/ether conversion.
Convert units of length, mass, volume, area, speed, temperature, data (KB vs KiB), energy, pressure, time and power, metric and imperial, with exact factors.
Unit conversion chart for length, weight, volume, area and data from one amount and unit
Convert token units (wei/gwei/ether or arbitrary decimals), between hex and int, and compute/validate an EIP-55 checksummed address.
Convert US cups to millilitres: send a number, get the converted value with the exact factor (or formula for temperature), the unit category and a rounded human-readable form. Deterministic, no network call. $0.01 per co...
Convert acres to hectares: send a number, get the converted value with the exact factor (or formula for temperature), the unit category and a rounded human-readable form. Deterministic, no network call. $0.01 per convers...
Convert litres per 100 km to miles per US gallon: send a number, get the converted value with the exact factor (or formula for temperature), the unit category and a rounded human-readable form. Deterministic, no network...
Convert US short tons to kilograms: send a number, get the converted value with the exact factor (or formula for temperature), the unit category and a rounded human-readable form. Deterministic, no network call. $0.01 pe...
Convert a value between units of length, mass, temperature, volume, area, speed, time, data, pressure, energy, power, angle, frequency - every unit the retired convert-* endpoints handled (e.g. miles, kilometers, kilogra...
Breached password check: is this password in known data breaches, and how often? Send only the SHA-1 hash (never the password); just the first 5 characters reach Have I Been Pwned (k-anonymity). Up to 50 hashes per call.
The current time, or a given time, in one or more IANA time zones, with UTC offset, abbreviation, whether daylight saving time is in effect, and the weekday. Give a local time with from_tz to convert it, handling DST cor...
Unit conversion API for agents: length, mass, volume, time, data and temperature (up to 100 conversions per call) for $0.002 USDC. Call when you need this bounded result without an API key or subscription. Returns machin...
Convert between unix epoch and human time: pass ?value=<seconds|ms|ISO-string> and get back epoch (s + ms), ISO-8601 UTC, and the value in a target timezone (?tz=America/Santiago, default UTC). Units are auto-detected (1...
Convert token units (wei/gwei/ether or arbitrary decimals), between hex and int, and compute/validate an EIP-55 checksummed address.
Offline validator for a Romanian CUI (company tax ID). Strips an optional 'RO' prefix, applies weights 7-5-3-2-1-7-3-2 to the digits preceding the check digit (right-to-left), sums the weighted products, multiplies by 10...
Check whether a phone number is valid and possible, find its country and type (mobile, fixed line, toll free and others), and format it as E.164, international and national (libphonenumber metadata).