{"uid":"cap_Lm8yLHLRI40P55JsRMBQ5","slug":"roman-numeral-converter-and-validator-9a4450d2","name":"Roman Numeral Converter and Validator","description":"Convert between integers (1-3999) and Roman numerals, and check whether a Roman numeral is written in canonical form.","url":"https://units-convert.x402tookit.com/roman-numerals?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["value"],"properties":{"value":{"type":"string","description":"An integer 1-3999 or a Roman numeral such as MCMXCIV"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"asOf":{"type":["null","string"]},"roman":{"type":["null","string"]},"source":{"type":["null","string"]},"integer":{"type":["null","number"]},"reasons":{"type":["array","null"]},"summary":{"type":["null","string"]},"verdict":{"type":["null","string"]},"degraded":{"type":["boolean","null"]},"disclaimer":{"type":["null","string"]},"notChecked":{"type":["array","null"],"items":{"type":"string"}}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_hjUZ6PNZhoEUqVdmShxVK","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Converts integers (1-3999) to Roman numerals, Roman numerals to integers, and validates whether a Roman numeral is in canonical form.","exampleAgentPrompt":"Convert 1994 to a Roman numeral and also tell me if MCMXCIV is written in proper canonical form.","exampleUseCases":[{"title":"Integer to Roman numeral conversion","prompt":"What is 2024 written as a Roman numeral?"},{"title":"Roman numeral to integer parsing","prompt":"Can you tell me what integer the Roman numeral MCMXCIV represents?"},{"title":"Canonical form validation","prompt":"Is IIII a valid or canonical Roman numeral, or should it be written differently?"}],"resultDescription":"Returns a JSON object containing the Roman numeral string, the integer equivalent, a verdict on whether the Roman numeral is in canonical form, a summary explanation, any reasons why it may not be canonical, and metadata such as source and timestamp.","failureModes":["Integer out of range (below 1 or above 3999) returns an error or null result","Invalid non-numeric, non-Roman-numeral string input may produce null or error response","Empty or missing 'value' query parameter returns a validation error","Ambiguous input that is neither a valid integer nor a recognizable Roman numeral may yield a null verdict"],"whenToPreferThis":"Choose this endpoint when you need to convert between Arabic integers and Roman numerals, or when you need to programmatically validate whether a Roman numeral string is written in correct canonical subtractive notation. It is the right choice for historical date display, Super Bowl numbering, clock face generation, or educational tools requiring Roman numeral correctness checks.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:20:15.305Z","isFirstParty":false,"canonicalSlug":"roman-numeral-converter-and-validator-9a4450d2"}