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Delx Commerce — Content Type Guesser
x402
Delx Commerce — Content Type Guesser is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-01).
Infers the MIME content type and file extension from a filename, file path, or URL string
Price / call$0.003
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 indicating whether the file type is recognized (known: true/false), the guessed MIME content type (e.g. 'application/pdf'), the normalized file extension (e.g. 'pdf'), the original filename as submitted, and a schema identifier string for the response format.
Example use cases
Set correct upload content-type header
“I'm about to upload a file called 'invoice_2024.xlsx' — what MIME type should I set in the Content-Type header?”
Validate file type before processing
“Before I process this file named 'archive.tar.gz', can you tell me what content type it likely is so I can check if my system supports it?”
Classify attachment type in email pipeline
“I have an email attachment named 'presentation.pptx' — what MIME type is that so I can route it to the right handler?”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/content-type-guess?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, zero-dependency MIME type lookup from just a filename string — no file content required. Ideal for agents that need to set Content-Type headers for uploads, route files by type, or validate attachments before processing, without parsing file bytes. At $0.003 USDC per call with no signup, it suits lightweight utility use in automated pipelines.
Side effects
- Unrecognized or exotic file extension returns known:false with null or generic content_type
- Missing or empty filename input may return an error or unknown result
- Filenames with no extension may not be resolvable
- Ambiguous extensions shared by multiple MIME types may return a best-guess or primary type only
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| filename | string | Filename, path, or URL used only for extension/MIME guess. |
Output
Schema · Response
{
"type": "json",
"example": {
"known": true,
"schema": "delx/util-content-type-guess/v1",
"filename": "report.PDF",
"extension": "pdf",
"content_type": "application/pdf"
}
}Tags
x402
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