{"uid":"cap_dKD-T5Y9-bFFvFK9j70r5","slug":"webref-list-mime-types-dd607b20","name":"WebRef List MIME Types","description":"Web standards and time reference for AI agents: HTTP status codes with what the client should do, retry semantics, MIME types and content-type matching, request-method safety and idempotency, plus deadline arithmetic - time until a moment, weekday and business-day checks, duration conversion and Unix timestamps. Pay per call in USDC on Base via x402 or USDC on Tempo via MPP. No signup, no API key, no KYC.","url":"https://webref.johnaio281.workers.dev/api/web/list_mime_types?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","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","limit":{"def":{"type":"default","innerType":{"def":{"type":"number","checks":[]},"type":"number","isFinite":true},"defaultValue":50},"type":"default"},"query":{"def":{"type":"optional","innerType":{"def":{"type":"string"},"type":"string"}},"type":"optional"},"topLevel":{"def":{"type":"optional","innerType":{"def":{"type":"string"},"type":"string"}},"type":"optional"}}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_NQPWja5zPqKqy7KedJp8r","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a searchable list of MIME types with content-type matching details for HTTP request/response handling","exampleAgentPrompt":"Can you look up all the MIME types in the 'image' category — I want to know the correct content-type strings to use when serving different image formats from my API?","exampleUseCases":[{"title":"Content-type header selection for API","prompt":"I'm building an HTTP API and need to know the right content-type value to set when returning a MessagePack binary payload — can you look that up for me?"},{"title":"Filtering MIME types by media category","prompt":"Show me all the registered MIME types under the 'audio' top-level type so I can decide which one to use for streaming podcast audio from my server."},{"title":"Validating file format support","prompt":"I need to check what MIME types exist for font files — can you search for font-related content types so I know what to whitelist in my upload validator?"}],"resultDescription":"A list of MIME type entries, each including the content-type string (e.g. 'application/json'), top-level media type, subtype, and any associated file extensions or descriptions. Results can be filtered by a search query or top-level type, and limited to a configurable number of entries (default 50).","failureModes":["No results returned if query string matches nothing in the registry","Limit parameter ignored or defaulted if invalid value passed","Invalid HTTP method (POST, PUT, etc.) rejected — only GET, HEAD, DELETE allowed","Network or worker errors returning 5xx if the underlying Cloudflare worker is unavailable","Payment failure via x402/MPP if USDC balance is insufficient or payment protocol misconfigured"],"whenToPreferThis":"Choose this endpoint when you need a programmatic, pay-per-call lookup of MIME types without signup or API keys — ideal for AI agents that need to resolve content-type strings on demand during HTTP request/response construction. Prefer this over static lookup tables when you need searchable, filterable, up-to-date MIME type data. Especially useful within automated workflows that already use the x402 or MPP payment protocol on Base.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-22T12:40:46.034Z","isFirstParty":false,"canonicalSlug":"webref-list-mime-types-dd607b20"}