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ONE Engine Text Starts-With Check
x402
ONE Engine Text Starts-With Check is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0009/call, status unknown (last checked 2026-10-02).
Checks whether a given text string starts with a specified search string, returning a boolean match result.
Price / call$0.0009
Success—
StatusUnknown
How this service works
Low-cost pay-per-call utility APIs for autonomous agents using x402 on Base.
Output
Returns a JSON object with a single boolean field `matches` indicating whether the provided `text` string begins with the `search` string. Example: {"matches": true}.
Example use cases
Validate file naming convention
“Check if the filename 'report_2024_final.pdf' starts with 'report_' so I can confirm it follows our naming convention.”
Filter user input by prefix
“Does the user's response 'Yes, I agree with the terms' start with 'Yes'? I need to know if they accepted.”
Verify URL scheme
“Tell me if the URL 'https://example.com/api/data' starts with 'https' so I know it's using a secure connection.”
Technical details
Endpoint
POSThttps://one-search.one-engine.workers.dev/v1/text/starts-with?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a cheap, fast, pay-per-call string prefix check without spinning up your own compute. It's ideal for autonomous agents running on x402/Base that want a simple utility operation billed at fractions of a cent per call, avoiding the overhead of a full text search or regex engine API.
Side effects
- Missing `text` or `search` fields in request body — likely returns an error or unexpected result
- Payment failure via x402 protocol if USDC balance is insufficient — returns 402 Payment Required
- Empty string inputs may produce ambiguous or trivially true results
- Case sensitivity behavior is not documented — prefix match may or may not be case-sensitive
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | |
| search | string |
Output
Schema · Response
{
"type": "json",
"example": {
"matches": true
}
}Tags
x402
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