{"uid":"cap_ILJpsSTnY4xHXgHayo5Qn","slug":"pennyrail-mime-type-lookup-49b30d2b","name":"PennyRail MIME Type Lookup","description":"Machine-readable settlement service","url":"https://pennyrail.vercel.app/api/p/nano/mime.lookup--proven-mime?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","required":["input"],"properties":{"input":{"type":"object"}}},"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_cm-rH_VzbULML4Z1iObKq","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":"Looks up the MIME type for a given file extension or filename via a paid micro-settlement API","exampleAgentPrompt":"What's the official MIME type for a .webp file? I need to set the correct Content-Type header.","exampleUseCases":[{"title":"Setting correct HTTP Content-Type headers","prompt":"What MIME type should I use in the Content-Type header when serving a .wasm file from my web server?"},{"title":"Validating file type before upload","prompt":"I'm about to upload a .xlsx file to our API — can you look up its correct MIME type so I can set the right header?"},{"title":"Building a file-type metadata table","prompt":"I'm building a list of MIME types for common audio file extensions like .mp3, .ogg, and .flac — can you resolve each one?"}],"resultDescription":"Returns a MIME type string (e.g. 'image/webp', 'application/wasm') corresponding to the given file extension or filename, representing the canonical content-type mapping.","failureModes":["Unknown or unsupported file extension returns null or empty result","Malformed input object yields a 400 or schema validation error","Payment not settled via x402 protocol results in 402 Payment Required","Vercel cold-start may add latency on first call","Non-standard or vendor-specific extensions may return approximate or missing types"],"whenToPreferThis":"Choose this endpoint when you need a machine-readable, authoritative MIME type lookup as part of an automated pipeline and are already operating in an x402 micro-payment context. Prefer over free public libraries when you need a guaranteed API contract, provenance logging, or are building an agent workflow that already settles micropayments per call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T06:47:07.753Z","isFirstParty":false,"canonicalSlug":"pennyrail-mime-type-lookup-8265ad63"}