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Delx Commerce — Content-Type Sniff
x402
Delx Commerce — Content-Type Sniff 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).
Heuristically detects the MIME content type of a file or data sample based on filename and/or byte sample
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 with the detected MIME content type (e.g. 'application/pdf'), a confidence indicator (heuristic), the filename used for inference, the number of sample bytes analyzed, a note about the local sniff scope, and a schema identifier (delx/util-content-type-sniff/v1).
Example use cases
Validate uploaded file format
“I have a file called 'report.xlsx' and some sample bytes from it — can you figure out what content type it actually is before I process it further?”
Route file to correct parser
“Before I decide which parser to use, can you detect the MIME type of this file named 'data.csv' using its filename and a sample of its bytes?”
Sanitize untrusted file uploads
“A user uploaded a file called 'image.png' but I'm not sure it's actually a PNG — can you sniff its real content type from the sample bytes and filename?”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/content-type-sniff?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, cheap ($0.001 USDC), no-signup content-type detection utility for agent workflows — especially when handling untrusted file uploads, routing files to parsers, or validating file formats before processing. Prefer this over full MIME database lookups when heuristic confidence is sufficient and low latency is important.
Side effects
- Missing both filename and sample may result in low-confidence or unknown content type
- Very short or ambiguous byte samples reduce detection accuracy
- Exotic or rare MIME types may not be in the local heuristic database
- Malformed input JSON returns an error response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| sample | string | Input field: sample. |
| filename | string | Input field: filename. |
Output
Schema · Response
{
"type": "json",
"example": {
"note": "local sniff only; not full MIME database",
"schema": "delx/util-content-type-sniff/v1",
"filename": "doc.pdf",
"confidence": "heuristic",
"content_type": "application/pdf",
"sample_bytes": 13
}
}Tags
x402
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