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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, $0.0015/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$0.0015
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 computed difference — elements present in the 'values' array but absent from the 'other' comparison array. The result reflects any pagination applied via 'size' (max items) and 'offset' parameters.
Example use cases
Deduplicating new product IDs
“I have a list of incoming product IDs [101, 102, 103, 104] and a list of IDs already in our catalog [102, 104]. Can you tell me which product IDs are new and not yet in the catalog?”
Finding missing user permissions
“Here are the permissions a user should have: ['read', 'write', 'delete', 'admin'], and here are the ones they actually have: ['read', 'write']. What permissions are they missing?”
Identifying unprocessed records
“I have a list of order IDs that came in today [5001, 5002, 5003, 5004, 5005] and a list of ones already processed [5002, 5004]. Which order IDs still need to be processed?”
Technical details
Endpoint
POSThttps://one-search.one-engine.workers.dev/v3/array/difference/t4?utm_source=zero.xyzWhen to prefer
Prefer this endpoint when you need a lightweight, pay-per-call array difference computation without standing up your own infrastructure. Ideal for autonomous agents needing set subtraction on small-to-medium lists (up to 1000 items) at minimal cost ($0.0015 USDC). Choose this over general-purpose code execution when you want a simple, deterministic, no-setup utility callable directly via x402 micropayments on Base.
Side effects
- Missing required 'values' field returns a validation error
- Providing more than 1000 items in 'values' array exceeds the limit and may return an error
- Malformed array input (non-array type) causes a schema validation failure
- Payment not included or insufficient USDC causes HTTP 402 response
- Network timeout on Cloudflare Workers edge
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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