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ONE Engine Array Index-Of
x402
ONE Engine Array Index-Of is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).
Finds the index of a given value within an array, returning whether it was found and at what position.
Price / call$0.001
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 boolean 'found' field indicating whether the value was present in the array, and an 'index' integer field indicating the zero-based position of the first match (e.g. {"found": true, "index": 1}).
Example use cases
Membership lookup in a list
“I have a list of approved user IDs like ["u001", "u002", "u003", "u004"] — check if "u003" is in there and tell me where it appears.”
Finding rank in a sorted leaderboard
“Here's my leaderboard array ["Alice", "Bob", "Carol", "Dave"] — what position is "Carol" at?”
Validating enum membership
“I need to know if "medium" is a valid option in my sizes array ["small", "medium", "large", "xlarge"] and what index it falls at.”
Technical details
Endpoint
POSThttps://one-search.one-engine.workers.dev/v1/array/index-of?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs a lightweight, pay-per-call array search operation without spinning up its own compute. Ideal for agents that occasionally need to locate an element in a list and want a simple, cheap utility call rather than embedding array logic in the agent itself. Best for small-to-medium arrays where a real-time lookup costing $0.001 USDC is acceptable.
Side effects
- Missing 'values' array returns an error or unexpected result
- Non-comparable types (e.g. object vs primitive) may not match as expected
- Payment failure via x402 if insufficient USDC balance on Base
- Network timeout on Cloudflare Worker edge
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| value | — | |
| values | array |
Output
Schema · Response
{
"type": "json",
"example": {
"found": true,
"index": 1
}
}Tags
x402
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