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ONE Engine Array Unique Filter
x402
ONE Engine Array Unique Filter 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).
Returns only the unique elements from a JSON array, optionally comparing against a second array or paginating results.
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
A JSON object containing the filtered array of unique values extracted from the input, with duplicates removed. When a comparison array is provided, returns elements unique relative to that second array. Pagination via offset and size parameters allows retrieving subsets of the unique result set.
Example use cases
Deduplicating user ID list
“I've got a list of user IDs pulled from multiple sources and there are a ton of duplicates — can you clean it up and give me just the unique IDs? Here's the full array of about 500 entries.”
Finding new items between two datasets
“I have yesterday's product catalog and today's catalog as two arrays — can you find which items appear in today's list that weren't in yesterday's? Compare the two and return only the new unique entries.”
Paginating unique tags from large dataset
“I have an array of 1000 tags from my content library with lots of repeats. Can you return just the unique ones, starting from offset 50 and limiting to 100 results?”
Technical details
Endpoint
POSThttps://one-search.one-engine.workers.dev/v3/array/unique/t8?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a low-cost, pay-per-call deduplication or set-difference operation on a JSON array of up to 1000 items, especially in autonomous agent workflows where you want to avoid running your own dedup logic or spinning up infrastructure. It is well-suited for lightweight array utility tasks billed per call via x402 on Base, making it economical for sporadic agent use cases without subscription overhead.
Side effects
- Input array exceeds 1000 items — request rejected
- Malformed JSON array in 'values' field — validation error
- Payment not included or insufficient — HTTP 402 response requiring x402 USDC payment on Base
- Empty array input returns empty unique result
- 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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