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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, $0.01/call, status unknown (last checked 2026-10-02).
Computes the difference between two arrays, returning elements present in the input array but not in the comparison array.
Price / call$0.01
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 that are present in the `values` input array but absent from the `other` comparison array, effectively the set difference A minus B. Supports optional pagination via `size` and `offset` parameters.
Example use cases
Filtering sold-out inventory items
“I have a list of all product SKUs we stock — [SKU001, SKU002, SKU003, SKU004, SKU005] — and a list of ones that sold out today — [SKU002, SKU004]. Can you compute the difference so I only see the SKUs still available?”
Identifying new subscribers since last sync
“Here are all current subscribers: [alice@ex.com, bob@ex.com, carol@ex.com, dave@ex.com]. My last export had [alice@ex.com, dave@ex.com]. Give me the difference — who's new since then?”
Removing processed task IDs from a queue
“My task queue has IDs [1001, 1002, 1003, 1004, 1005] and these have already been processed: [1002, 1005]. Can you run array difference to give me just the unprocessed ones?”
Technical details
Endpoint
POSThttps://one-search.one-engine.workers.dev/v3/array/difference/t8?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, cheap ($0.01 USDC), pay-per-call array difference computation without standing up your own infrastructure. Ideal for autonomous agents that occasionally need set subtraction on moderate-sized arrays (up to 1000 items) as part of a larger workflow, without needing a full database or compute environment.
Side effects
- Input array exceeds 1000 items — rejected with validation error
- Missing required `values` field — returns 400-level error
- Payment not included or insufficient — returns HTTP 402 requiring x402 payment on Base
- Malformed JSON body — parse error response
- Network timeout on Cloudflare Worker 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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