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Delx Commerce — MIME Type to File Extension Converter
x402
Delx Commerce — MIME Type to File Extension Converter is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).
Converts a MIME type string to its canonical file extension and metadata
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.
Output
Returns a JSON object containing the canonical file extension (e.g. 'png'), the original MIME type echoed back (e.g. 'image/png'), a boolean 'known' flag indicating whether the MIME type is recognized, and a schema identifier string ('delx/util-ext-from-mime/v1').
Example use cases
Naming downloaded files correctly
“I'm downloading a file and the server returns Content-Type: application/pdf — what file extension should I use when saving it?”
Validating uploaded file type mapping
“A user uploaded a file with MIME type audio/mpeg — what extension does that correspond to so I can store it with the right name?”
Building a media pipeline file sorter
“I have a bunch of files tagged with MIME types like video/mp4 and image/webp — can you look up the correct file extensions for each so I can rename and organize them?”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/ext-from-mime?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, deterministic lookup of the canonical file extension for a given MIME type — especially in download handling, file storage naming, or media pipeline workflows. Prefer this over regex-based custom mappings or client-side heuristics when you need a reliable, maintained reference. At $0.001 per call with no signup required, it's ideal for agent workflows that encounter arbitrary content types at runtime.
Side effects
- Unknown or non-standard MIME type returns known:false with a best-guess or empty extension
- Malformed MIME type string may return an error or unknown result
- Missing 'mime' input field causes a validation error
- Extremely obscure vendor MIME types (e.g. application/vnd.x.custom) may not be in the lookup table
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| mime | string | Input field: mime. |
Output
Schema · Response
{
"type": "json",
"example": {
"ext": "png",
"mime": "image/png",
"known": true,
"schema": "delx/util-ext-from-mime/v1"
}
}Tags
x402
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