{"uid":"cap_vqR4buebUEFZtnXgpcFDe","slug":"pennyrail-roman-numeral-converter-846175e3","name":"PennyRail Roman Numeral Converter","description":"Machine-readable settlement service","url":"https://pennyrail.vercel.app/api/p/nano/number.roman--roman-numerals","method":"POST","headers":{},"bodySchema":{"type":"object","required":["input"],"properties":{"input":{"type":"number"}}},"responseSchema":{"type":"object","additionalProperties":true},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ssJWdBTWUUTJnbelmkrtd","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Converts an integer number into its Roman numeral string representation","exampleAgentPrompt":"Convert the number 2024 into Roman numerals for me.","exampleUseCases":[{"title":"Year formatted as Roman numerals","prompt":"What is the year 1994 written in Roman numerals? I want to put it on a commemorative plaque."},{"title":"Book chapter numbering","prompt":"I'm formatting a book and need chapter 14 written in Roman numerals — can you convert it?"},{"title":"Clock face numeral label","prompt":"I'm designing a clock face and need to show the number 12 as a Roman numeral. Can you convert 12 for me?"}],"resultDescription":"An object containing the Roman numeral string corresponding to the input integer (e.g., input 2024 → 'MMXXIV'). The response schema is open-ended (additionalProperties: true), so the Roman numeral value is returned in a field within the response object.","failureModes":["Input is not a valid number (type mismatch) — likely 400 or 422 error","Input number is out of range for Roman numeral representation (e.g. 0 or negative) — may return error or unexpected result","Very large integers may not have a standard Roman numeral representation — undefined behavior","Payment not included or invalid — 402 Payment Required with x402 challenge","Service unavailable on Vercel deployment — 503 or timeout"],"whenToPreferThis":"Use this endpoint when you need a quick, paid-per-call microservice to convert an integer to a Roman numeral string without running local logic. Useful in agent pipelines where you want a reliable external conversion step, or when building apps that display classical numeral formatting (book chapters, clock faces, year inscriptions, copyright notices).","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T07:21:55.318Z","isFirstParty":false}