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MIME Type Lookup
x402
MIME Type Lookup is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Bidirectional MIME type lookup: convert a file extension or filename to its content type, or a content type to its associated extensions, across 80 common formats.
Price / call$0.01
Success—
StatusUnknown
How this service works
MIME type lookup both ways: extension or filename to content type, or content type to extensions, for 80 common web, image, audio, video, font, document and archive formats, with a category. $0.01 per lookup.
Output
Returns the MIME content type string (e.g. 'image/webp'), associated file extension(s), and a format category (e.g. 'image', 'audio', 'video', 'document', 'archive') — going either from extension/filename to content type, or from content type to extensions.
Example use cases
Set correct HTTP Content-Type header
“I'm building an API response that returns a .webp image — what MIME type string should I put in the Content-Type header?”
Identify file type from content type
“I got a response with Content-Type 'application/vnd.openxmlformats-officedocument.wordprocessingml.document' — what file extension does that correspond to?”
Validate upload file extension
“A user is uploading a file with the extension .flac — what's the MIME type for that, and what category of format is it?”
Technical details
Endpoint
GEThttps://intel.rallylive.ca/data/mimeWhen to prefer
Use this endpoint when you need fast, authoritative bidirectional MIME type resolution for common web, media, font, document, or archive formats, and you want to avoid hardcoding lookup tables in your agent. Especially useful when building HTTP response headers, validating file uploads, or categorizing file types programmatically. Not suitable for highly specialized, vendor-specific, or obscure MIME types outside the 80 covered formats.
Side effects
- Unknown or unsupported extension/MIME type returns no match or error — only ~80 common formats are covered
- Malformed MIME type string may return no result
- Rare or vendor-specific MIME types not in the 80-format library will fail to resolve
- Missing or empty input parameter causes a validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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