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Delx Commerce — Contains Text Check
x402
Delx Commerce — Contains Text Check 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).
Checks whether a given string contains a specified substring, with optional case-insensitive matching, for $0.001 USDC per call via x402.
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 'result' field (true if the needle was found, false otherwise), the schema identifier 'delx/util-contains-text/v1', and an echo of the ignore_case setting used.
Example use cases
Keyword filter for scraped content
“Check if this scraped article body contains the phrase 'climate change' — don't worry about capitalization.”
Log line error detection
“Does this log entry contain the word 'ERROR'? Entry: '[2024-06-01 12:34:56] INFO: Service started successfully.'”
Required term validation in AI output
“Make sure the AI-generated product description contains the word 'warranty' somewhere — here's the text: 'Our premium blender comes with a 2-year guarantee and free shipping.'”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/contains-text?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-call, no-signup substring check with verifiable delivery over USDC — ideal for AI agents that need on-demand, trustless string containment checks without managing API keys or subscriptions. Prefer it over rolling your own logic when operating in an autonomous agent context that already supports x402 micropayments.
Side effects
- Missing 'text' or 'needle' fields returns a validation error
- Payment not included or insufficient USDC results in HTTP 402 Payment Required
- Malformed JSON body returns a 400 Bad Request
- Very large text inputs may exceed payload size limits
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | Input field: text. |
| needle | string | Input field: needle. |
| ignore_case | boolean | Input field: ignore case. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": true,
"schema": "delx/util-contains-text/v1",
"ignore_case": true
}
}Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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