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Delx Path Ext
x402
Delx Path Ext is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).
Extracts the file extension from a given file path or URL path segment, returning a deterministic JSON result.
Price / call$0.001
Success—
StatusUnknown
How this service works
Extract file extension from a path or URL path segment — first-party local utility for agent preflight and proven micro-utils expansion. Returns deterministic machine-readable JSON for $0.001 USDC via x402 on Base. Execution is first-party, local-only, stateless, and memory-only with no paid upstream, no input retention, no web search, no live RPC, and no mediagen. Results are advisory; the caller owns authorization, budgets, and production controls.
Output
Returns a deterministic JSON object containing the extracted file extension (e.g. '.pdf', '.jpg', '.js') from the input path or URL path segment. If no extension is present, returns an empty or null extension field.
Example use cases
Validate upload file type
“I have an uploaded file at path '/tmp/user_uploads/photo.jpeg' — can you extract the file extension so I can check if it's an allowed image type?”
Parse asset type from URL path
“Given the URL path '/static/assets/bundle.min.js', what file extension does that path have?”
Route files by extension in pipeline
“I'm processing a batch of paths like '/data/exports/report.csv' — can you pull out the file extension from this path so I can decide how to handle it?”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/path-extWhen to prefer
Use this endpoint when you need a lightweight, deterministic, stateless extraction of a file extension from a path string during agent preflight checks, file routing logic, or validation pipelines — especially when you want a guaranteed machine-readable JSON response with no side effects and sub-cent cost via x402.
Side effects
- Empty or missing path input returns an error or empty extension
- Path with no extension returns null or empty string for extension
- Malformed JSON input causes a 400-level error
- Paths with multiple dots (e.g. 'file.tar.gz') may return only the last extension segment
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| path | string | Input field: path. |
Output
Schema · Response
{
"type": "json",
"example": {
"schema": "delx/util-path-ext/v1",
"basename": "b.PNG",
"extension": "png",
"has_extension": true
}
}Tags
x402
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