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ONE Engine Array Tail — Last 3 Items (Tier 2)
x402
ONE Engine Array Tail — Last 3 Items (Tier 2) is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0006/call, status unknown (last checked 2026-10-12).
Returns the last 3 elements of a JSON array, with Tier 2 richer diagnostic information included in the response.
Price / call$0.0006
Success—
StatusUnknown
How this service works
Return last 3 array items. Tier 2/10 adds richer diagnostics.
Output
Returns a JSON object containing an array of the last 3 elements from the input array, plus Tier 2 richer diagnostic metadata such as input length, operation performed, tier info, and processing details.
Example use cases
Extract latest pipeline log entries
“I have a JSON array of pipeline log events and I only need the last 3 entries to check what happened most recently — can you pull those out for me with diagnostics?”
Get last 3 leaderboard scores
“Here's my leaderboard scores array — I want just the final 3 scores at the end of the list, so I can display the most recent results.”
Preview tail of processed data batch
“I ran a data processing job that produced a big JSON array and I want to quickly preview the last 3 results to sanity-check the output — can you grab those for me?”
Technical details
Endpoint
POSThttps://one-search.one-engine.workers.dev/v6/array-tail/items-3/t2?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a cheap, deterministic, pay-per-call utility to extract the tail (last 3 elements) of a JSON array and you also want richer diagnostic output (Tier 2) compared to the base tier. Ideal for autonomous agents that process ordered lists and need just the most recent or final entries without custom code. Prefer over Tier 1 when diagnostics matter for debugging or logging.
Side effects
- Input is not a valid JSON array — returns a 400 error
- Array has fewer than 3 elements — may return all available elements or an error
- Payment not provided or invalid x402 payment header — returns 402 Payment Required
- Malformed request body — returns 400 or 422 error
- Network timeout on the Workers edge — returns 503 or 504
Tags
x402
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