Directory / unit.openverbs.com
Convert a value between units — length, mass, volume, temperature, area, speed, pressure, energy, power, digital storage, time, angle, frequency and more. Unknown units or a conversion between incompatible measures (e.g. kg → km) are rejected as a clean 400.
# 1. Ask the endpoint what it costs (no payment, no wallet needed): curl -i -X GET 'https://unit.openverbs.com/v1/convert' # -> HTTP/1.1 402 Payment Required # the response carries the price, asset and pay-to address. # 2. Pay and retry with any x402 client: npx x402-fetch 'https://unit.openverbs.com/v1/convert'
Endpoint: https://unit.openverbs.com/v1/convert. Operated by unit.openverbs.com, not by Animica. Price and availability were correct at the last probe on 2026-10-01 and are set by the operator, who may change them.
List the supported units and their metadata (abbreviation, measure, system, singular/plural names), optionally filtered to a single measure — a discovery endpoi…