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Delx Ensure Suffix
x402
Delx Ensure Suffix is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Ensures a string ends with a specified suffix, appending it only if not already present, returning the normalized result as JSON
Price / call$0.001
Success—
StatusUnknown
How this service works
Ensure a string ends with a required suffix without duplication — 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. Sibling of Delx routes that already…
Output
A JSON object containing the normalized string that is guaranteed to end with the requested suffix exactly once, with no duplication if the suffix was already present.
Example use cases
Normalize file extension in pipeline
“I have a filename 'report.csv' and I want to make sure it ends with '.csv' — if it already has that extension don't add it again.”
Ensure trailing slash on URL
“Can you make sure this URL 'https://api.example.com/v1' ends with a '/' without duplicating it if it's already there?”
Enforce environment tag on resource name
“I need to guarantee the string 'my-service' ends with '-staging' for my deployment pipeline — only append it if it's not already present.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/ensure-suffixWhen to prefer
Choose this endpoint when you need a deterministic, stateless, idempotent micro-utility to normalize string suffixes during agent preflight checks, pipeline normalization steps, or data validation flows — particularly when you want a machine-readable JSON result and no side effects. Ideal for ensuring file extensions, URL trailing slashes, or naming convention suffixes are present without duplication.
Side effects
- Missing 'text' or 'suffix' fields returns an error response
- Empty suffix string may return the original text unchanged
- Payment failure or insufficient USDC balance via x402 blocks execution
- Malformed JSON input returns a 400-level error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | Input field: text. |
| suffix | string | Input field: suffix. |
Output
Schema · Response
{
"type": "json",
"example": {
"text": "report.json",
"schema": "delx/util-ensure-suffix/v1",
"suffix": ".json",
"already_present": false
}
}Tags
x402
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