numeral.openverbs.com/v1/roman

Convert between integers (1–3999) and Roman numerals in either direction — a digit string is encoded to Roman, a Roman numeral is decoded to an integer. Non-canonical numerals (IIII, IC) are rejected.

Price $0.002
Method GET
Protocol x402
Last probe 402
Verified 2026-10-01

Call it

# 1. Ask the endpoint what it costs (no payment, no wallet needed):
curl -i -X GET 'https://numeral.openverbs.com/v1/roman'

# -> 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://numeral.openverbs.com/v1/roman'

Endpoint: https://numeral.openverbs.com/v1/roman. Operated by numeral.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.

Other endpoints on numeral.openverbs.com

numeral.openverbs.com/v1/radix

Convert an integer between numeral bases 2–36 (binary, octal, hex, base36, …). Arbitrary size via BigInt; digits are case-insensitive and a leading minus is all…

GET · $0.002

All 2 endpoints on numeral.openverbs.com →