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ONE Engine Array Flatten
x402
ONE Engine Array Flatten 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).
Flattens a nested JSON array into a single-level array, with optional slicing and comparison array support.
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 flattened (single-level) version of the input nested array, with optional offset and size slicing applied. The response schema is open (additionalProperties: true), so the flattened result and any metadata are included in the response object.
Example use cases
Normalizing nested API response data
“I've got a nested JSON array from an API response — something like [["a","b"],["c",["d","e"]]] with about 20 items — can you flatten it into a single-level list for me?”
Preprocessing data for ML pipeline
“Before I feed this dataset into my model I need to flatten the nested feature arrays. Here's my array with around 200 items: [[[1,0],[0,1]],[[1,1],[0,0]]]. Flatten it all into one level for me.”
Comparing flattened arrays for diff
“I have two arrays — a nested main one with 15 items and a comparison array [10,20,30] — can you flatten the main one and compare it against the comparison array?”
Technical details
Endpoint
POSThttps://one-search.one-engine.workers.dev/v3/array/flatten/t8?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-call array flattening operation without deploying your own transformation logic. Ideal for autonomous agents that need to normalize nested JSON arrays on demand at low cost ($0.01 USDC per call via x402 on Base). Best suited for arrays up to 1000 items. Prefer this over writing custom code when you need a quick, reliable serverless transformation in an agent workflow.
Side effects
- Input array exceeds 1000-item limit — returns an error or truncated result
- Malformed JSON array in 'values' field — returns a parsing or validation error
- Payment failure via x402 on Base — request not processed, 402 response returned
- Empty 'values' array — may return an empty result or minimal response
- Invalid types for 'offset' or 'size' — may return a validation error
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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