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ONE Engine Array Flatten (T4)
x402
ONE Engine Array Flatten (T4) 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).
Flattens a nested JSON array into a single-level array, with optional comparison and offset parameters.
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
A JSON object containing the flattened (single-level) version of the input array, with any nested sub-arrays collapsed into a single sequence, optionally offset and compared against a provided reference array.
Example use cases
Normalize nested API response arrays
“I'm getting a nested array back from another API — can you flatten it into a single-level list? Here's the data: [["a","b"],["c",["d","e"]],"f"] with up to 200 items.”
Compare flattened output against reference
“Flatten this nested array [[1,[2,3]],[4,5]] and compare the result against my reference array [1,2,3,4,5] — I want to see if they match after flattening.”
Paginate through flattened array chunks
“Take this large nested array (up to 1000 items) and flatten it, but start at offset 50 so I can work through it in chunks: [[10,20],[30,[40,50]],60,70].”
Technical details
Endpoint
POSThttps://one-search.one-engine.workers.dev/v3/array/flatten/t4?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a cheap, pay-per-call utility to flatten nested JSON arrays at low cost ($0.0015 USDC) without standing up your own infrastructure. Ideal for autonomous agents that occasionally need to normalize array structures mid-workflow without a persistent backend dependency.
Side effects
- Input array exceeds 1000-item limit — request rejected or truncated
- Malformed JSON in values field — 400 error
- Invalid offset value (negative or out of bounds) — may return empty or error
- Non-array value passed as 'values' field — schema validation error
- Payment failure via x402 — 402 response before processing begins
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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