Roman Numeral API

POST https://api.findutils.com/api/tools/roman-numeral/execute

Convert between Roman numerals and Arabic integers (1-3999).

Needs an API key. Running a tool needs an API key. Keys are not for sale yet: ask for early access. About API keys

Try it

Request body

application/json

input

string required

Number (e.g. "1984") or Roman numeral (e.g. "MCMLXXXIV").
mode

string optional

Direction. "auto" chooses based on whether input is numeric. One of auto · to_roman · to_arabic. Default "auto".

Example arguments

Verified

{
  "input": "2026",
  "mode": "auto"
}

curl -X POST https://api.findutils.com/api/tools/roman-numeral/execute \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "input": "2026",
    "mode": "auto"
  }'

const response = await fetch('https://api.findutils.com/api/tools/roman-numeral/execute', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json', Authorization: 'Bearer YOUR_API_KEY' },
  body: JSON.stringify({"input":"2026","mode":"auto"}),
});
const data = await response.json();

import requests

response = requests.post(
    "https://api.findutils.com/api/tools/roman-numeral/execute",
    headers={"Authorization": "Bearer YOUR_API_KEY"},
    json={"input":"2026","mode":"auto"},
)
data = response.json()

$ch = curl_init('https://api.findutils.com/api/tools/roman-numeral/execute');
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => ['Content-Type: application/json', 'Authorization: Bearer YOUR_API_KEY'],
    CURLOPT_POSTFIELDS => '{"input":"2026","mode":"auto"}',
    CURLOPT_RETURNTRANSFER => true,
]);
$data = json_decode(curl_exec($ch), true);

Also an MCP tool

Call roman_numeral from Claude, Cursor or any MCP client. Same arguments, same output.

https://mcp.findutils.com

MCP reference

Rate limit: 60 a minute, per IP
Auth: API key
REST id: roman-numeral
MCP name: roman_numeral
Category: Conversion
Machine-readable: openapi.json · markdown.md

Request body

Example arguments

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