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Delx Commerce — String Index-Of Lookup
x402
Delx Commerce — String Index-Of Lookup 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 index position of a needle substring within a text string, or indicates not found
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 with a boolean 'found' field indicating whether the needle was located, an 'index' integer giving the zero-based position of the first occurrence within the text (e.g. 6), and a 'schema' string identifying the response version (delx/util-index-of/v1).
Example use cases
Log parsing substring search
“I have this log message: 'WARNING: connection timeout at endpoint /api/health' — can you find where the word 'timeout' starts in that string?”
Template variable position detection
“In the template string 'Hello {{name}}, your order {{id}} is ready', find the index of '{{name}}' so I know where to begin substituting.”
CSV field boundary detection
“Given the CSV row 'Alice,30,Engineer,New York', find the index of the third comma so I can split out the last field.”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/index-of?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs a verifiable, pay-per-use string index-of operation without signing up for an account, particularly in crypto-native or x402-compatible payment workflows on Base or Solana. Useful when deterministic string position lookup is needed as a composable microservice step in an agent pipeline.
Side effects
- Missing 'text' or 'needle' fields returns an error
- Empty needle or text may produce undefined behavior
- Payment failure via x402 will block the request
- Very long strings may exceed request size limits
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | Input field: text. |
| needle | string | Input field: needle. |
Output
Schema · Response
{
"type": "json",
"example": {
"found": true,
"index": 6,
"schema": "delx/util-index-of/v1"
}
}Tags
x402
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