{"uid":"cap_DP4enGjeHV5X1ezIAQ75C","slug":"one-engine-array-head-first-3-items-tier-10-8e7bb444","name":"ONE Engine Array Head – First 3 Items (Tier 10)","description":"Return first 3 array items. Tier 10/10 adds richer diagnostics.","url":"https://one-search.one-engine.workers.dev/v6/array-head/items-3/t10?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.007","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.007/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.007","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.007","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_pqe0yex4BeiakevJfqhbS","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.007","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the first 3 elements of a submitted array, with Tier 10 richer diagnostic metadata included in the response.","exampleAgentPrompt":"I have a JSON array and I need just the first 3 items from it — can you slice it down to those three elements and include the full diagnostic breakdown in the response?","exampleUseCases":[{"title":"Preview top pipeline results","prompt":"I just got back a long list of search results as an array — can you pull out just the first 3 items so I can preview the top results before deciding what to do next? Include the diagnostics too."},{"title":"Limit feed entries for display","prompt":"I have an array of 50 news feed entries and I only want to show the first 3 in my dashboard widget — trim the array to the first 3 and give me the diagnostic info."},{"title":"Sample leading data rows","prompt":"This dataset came back as a big JSON array — can you extract the first 3 rows from it so I can sanity-check the structure and field names before processing the whole thing?"}],"resultDescription":"A JSON response containing a sliced array of the first 3 elements from the input array, plus Tier 10 diagnostic metadata such as input length, slice bounds, processing tier, and any enriched debug information about the operation.","failureModes":["Empty array input returns empty result or an error indicating nothing to slice","Non-array body causes a 400-level parse error","Array with fewer than 3 items returns all available items (or an error depending on strict mode)","Malformed JSON body results in a parsing failure","Payment not provided or insufficient causes a 402 Payment Required response"],"whenToPreferThis":"Choose this endpoint when you need a fast, cheap, deterministic head-slice of exactly 3 items from a JSON array and want the richest available diagnostic output (Tier 10). Prefer it over manual slicing in agent code when auditability, diagnostic tracing, or pay-per-call metering on Base via x402 is desired.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-14T00:33:12.895Z","isFirstParty":false,"canonicalSlug":"one-engine-array-head-first-3-items-tier-10-8e7bb444"}