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Delx MIME Lookup
x402
Delx MIME Lookup is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-20).
Returns the canonical MIME type for a given file extension or filename for $0.001 USDC per call.
Price / call$0.001
Success—
StatusUnknown
How this service works
Look up a common MIME type from extension/filename for $0.001 USDC. Call when you need this bounded result without an API key or subscription. Returns machine-readable JSON via x402 on Base or Solana. Limitation: results cover only the supplied input or one bounded public endpoint at request time; callers must verify before acting.
Output
Returns the canonical MIME type string (e.g. 'image/webp', 'application/json') corresponding to the provided file extension or filename, allowing agents to correctly label or process files by content type.
Example use cases
Set HTTP Content-Type for uploads
“I'm building a file upload handler and need to know the correct MIME type for .svg files so I can set the Content-Type header properly.”
Validate file type before processing
“What's the standard MIME type for a .docx file? I want to make sure I'm tagging it correctly before storing it.”
Serve static assets with correct headers
“I need the MIME type for .wasm files so my server can serve them with the right Content-Type instead of guessing.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/mime-lookup?utm_source=zero.xyzWhen to prefer
Use this endpoint when an agent needs a quick, authoritative MIME type lookup without bundling a large MIME database locally, especially within an x402-enabled micropayment workflow where $0.001 per call is acceptable. Prefer it over hardcoded lookup tables when accuracy and coverage for less common extensions matter.
Side effects
- Unknown or uncommon extension returns null or generic 'application/octet-stream'
- Malformed input (e.g. no extension) may return an error or fallback type
- Payment failure or insufficient USDC balance blocks the call
- Rate limiting if too many calls are made in quick succession
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| outputrequired | object |
Output
Schema · Response
{
"type": "json",
"example": {}
}Tags
x402
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