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ONE Engine Array Difference
x402
ONE Engine Array Difference is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-02).
Computes the difference between two arrays, returning elements present in the first array but not in the second.
Price / call$0.004
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 containing the array of elements present in the 'values' input array but absent from the 'other' comparison array, effectively the set difference (A minus B).
Example use cases
Deduplicating new user signups
“I have today's list of registered user IDs and a list of IDs we already have in our database — can you subtract the existing IDs from the new ones so I only see genuinely new signups?”
Finding unprocessed job queue items
“Here's my full queue of task IDs and here's the list of tasks we've already completed — can you diff them and tell me which tasks still need to be processed?”
Identifying missing product SKUs
“I have a master catalog of SKUs and a list of what's currently in stock — give me the difference so I know which SKUs are out of stock or missing from inventory.”
Technical details
Endpoint
POSThttps://one-search.one-engine.workers.dev/v3/array/difference/t6?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-call array difference computation without spinning up your own infrastructure. It is ideal for autonomous agents operating on Base/x402 that need fast set subtraction on arrays up to 1000 items, and where a serverless utility call is cheaper than implementing custom logic. Prefer alternatives if you need difference on arrays larger than 1000 items, need symmetric difference, or require union/intersection operations instead.
Side effects
- Input 'values' array exceeds 1000-item limit — request rejected
- Missing required 'values' field — validation error returned
- Malformed JSON body — parse error
- Payment not included or insufficient — 402 Payment Required response
- Non-array value passed for 'values' or 'other' — schema validation failure
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| size | integer | |
| other | array | Optional comparison array |
| offset | integer | |
| valuesrequired | array | JSON array with at most 1000 items |
Output
Schema · Response
{
"type": "object",
"additionalProperties": true
}Tags
x402
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