Numeral Systems

active

Numeral-system conversions — arbitrary-base radix conversion, Roman numerals (both ways) and English number words / ordinals.

UtilityBasex402 v2exactnumeral.openverbs.com ↗︎
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100.0%
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10

Endpoints (4 live)

  • POST /v1/ordinal — Format a non-negative integer as an ordinal — both the suffixed form (21st) and the ordinal words (twenty-first). (0.002 USDC on Base)
  • POST /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 allowed. (0.002 USDC on Base)
  • POST /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. (0.002 USDC on Base)
  • POST /v1/words — Spell an integer out in English words, e.g. 123 → "one hundred twenty-three". Negatives are prefixed with "minus". (0.002 USDC on Base)

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