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Delx Commerce — Ensure Prefix
x402
Delx Commerce — Ensure Prefix 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).
Ensures a given string starts with a specified prefix, adding it if absent and reporting whether it was already present
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 final normalized text (with the prefix guaranteed), the prefix that was checked, the schema identifier ('delx/util-ensure-prefix/v1'), and a boolean 'already_present' indicating whether the prefix was already in the original input string.
Example use cases
Normalize URL before API call
“I have this URL 'example.com/endpoint' and I need to guarantee it starts with 'https://' before I pass it to another service — can you add the prefix if it's missing?”
Ensure file path prefix consistency
“I'm processing a list of paths and I need each one to start with '/data/' — take the string 'reports/sales.csv' and make sure it has that prefix.”
Idempotent prefix check for pipeline
“In my data pipeline I need to confirm the string 'mailto:user@example.com' already starts with 'mailto:' — check it and tell me if the prefix was already present or if it was added.”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/ensure-prefix?utm_source=zero.xyzWhen to prefer
Use this endpoint when an agent needs a guaranteed-idempotent, verifiable, pay-per-result string prefix normalization step — especially for URL canonicalization or path normalization inside automated pipelines where correctness must be confirmed programmatically. It is preferable over local string logic when auditability, verifiable delivery, or pipeline consistency across distributed agents is required.
Side effects
- Missing required 'text' or 'prefix' field returns a validation error
- Empty string inputs may produce unexpected normalization results
- Payment failure via x402 (insufficient USDC balance) blocks the request
- Network timeout if the Delx Commerce endpoint is temporarily unavailable
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | Input field: text. |
| prefix | string | Input field: prefix. |
Output
Schema · Response
{
"type": "json",
"example": {
"text": "https://api.delx.ai",
"prefix": "https://",
"schema": "delx/util-ensure-prefix/v1",
"already_present": false
}
}Tags
x402
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