{"uid":"cap_wQ_T42eJuC8er7S15ivXK","slug":"one-engine-array-step-every-3rd-item-tier-1-afeda2ba","name":"ONE Engine Array Step — Every 3rd Item (Tier 1)","description":"Return every 3th array item. Tier 1/10 adds richer diagnostics.","url":"https://one-search.one-engine.workers.dev/v6/array-step/every-3/t1?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.0008","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":"$0.0008/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0008","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0008","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_PzLUgI8uENcUNF6S9gik3","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.0008","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns every 3rd element from an input array, with richer diagnostic metadata at Tier 1.","exampleAgentPrompt":"I have a list of sensor readings and I need to downsample it by keeping only every 3rd value — can you run it through the array-step every-3 filter and give me the diagnostic details too?","exampleUseCases":[{"title":"Downsample time-series sensor data","prompt":"I've got a long array of temperature readings taken every second and I only need every 3rd one to reduce the volume — filter it down and show me the diagnostic output."},{"title":"Extract every third product from a catalog","prompt":"Here's an array of 90 product IDs from our inventory list. Pull out every 3rd item so I can build a rotating spotlight feature, and include the step diagnostics."},{"title":"Thin a log array for quick review","prompt":"I have an array of 300 log entries and I want a quick sample — give me every 3rd entry from the list along with any diagnostic info about how the step was applied."}],"resultDescription":"Returns a new array containing only the elements at positions 0, 3, 6, 9, … (every 3rd element) of the input array, along with Tier 1 richer diagnostic metadata such as original array length, output length, step size, and processing details.","failureModes":["Empty array input returns empty result or error","Non-array body causes a 400 bad request","Payment not provided or insufficient funds triggers x402 payment-required response","Malformed JSON body results in parse error","Array contains non-serializable types which may cause processing failure"],"whenToPreferThis":"Choose this endpoint when you need a simple, cheap, pay-per-call array downsampling operation — specifically extracting every 3rd element — without standing up any custom infrastructure. The Tier 1 variant is preferable when you want diagnostic metadata about the operation in addition to the filtered result. At $0.0008 per call it is cost-effective for agents that need lightweight list-thinning repeatedly.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-16T06:33:02.028Z","isFirstParty":false,"canonicalSlug":"one-engine-array-step-every-3rd-item-tier-1-afeda2ba"}