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Delx Commerce — MIME Type Lookup from File Extension
x402
Delx Commerce — MIME Type Lookup from File Extension 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).
Returns the MIME type corresponding to a given file extension, with a flag indicating whether the extension is recognized.
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 original extension, the resolved MIME type string (e.g. 'image/png'), and a boolean 'known' flag indicating whether the extension is in the recognized lookup table.
Example use cases
Set HTTP response content-type header
“I'm serving a .svg file from my server — what's the correct MIME type I should use in the Content-Type header?”
Validate uploaded file extension
“A user uploaded a file with a .heic extension — is that a known file type, and what MIME type does it correspond to?”
Label files before sending to storage
“Before I upload a .ogg file to object storage, can you tell me what MIME type I should tag it with?”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/mime-from-ext?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, low-cost, deterministic MIME type resolution from a file extension without integrating a library or maintaining a lookup table yourself. Ideal for agents operating in serverless or constrained environments where importing MIME databases is impractical. At $0.001 USDC per call with no signup required, it suits lightweight on-demand lookups within automated pipelines.
Side effects
- Unknown or obscure extension returns 'known: false' with a null or generic MIME type
- Missing 'ext' field in request body results in a validation error
- Extension submitted with leading dot (e.g. '.png' instead of 'png') may not match correctly
- Payment failure via x402 protocol results in 402 response before lookup is executed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| ext | string | Input field: ext. |
Output
Schema · Response
{
"type": "json",
"example": {
"ext": "png",
"mime": "image/png",
"known": true,
"schema": "delx/util-mime-from-ext/v1"
}
}Tags
x402
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