{"uid":"cap_bYlsi4wcmRm7uQYo6bTqC","slug":"one-engine-json-first-keys-extractor-p3-t2-a1da435d","name":"ONE Engine JSON First-Keys Extractor (p3/t2)","description":"Deterministic JSON object processing utility: Return first object keys; parameter=3. Tier 2/10 provides progressively richer diagnostics.","url":"https://one-search.one-engine.workers.dev/v8/record-process/first-keys/p3/t2?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.0007","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":"$0.0007/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0007","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0007","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_KnYeTBZVApAS9YyGFAt-u","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.0007","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the first N keys of a JSON object with tier-2 diagnostics, where N=3 is fixed by the parameter.","exampleAgentPrompt":"Can you pull the first 3 keys from this JSON object for me? Here it is: {\"name\": \"Alice\", \"age\": 30, \"city\": \"NY\", \"country\": \"US\", \"zip\": \"10001\"}","exampleUseCases":[{"title":"Preview JSON schema fields","prompt":"I have a large JSON object and just want to see what the first 3 keys are — can you extract them for me? Here's the object: {\"id\": \"abc123\", \"timestamp\": 1700000000, \"status\": \"active\", \"payload\": {}, \"meta\": null}"},{"title":"Validate JSON key ordering","prompt":"Can you check which keys come first in this JSON and return the top 3? I need to verify the structure follows our schema: {\"version\": 2, \"created_at\": \"2024-01-01\", \"author\": \"bot\", \"data\": [], \"flags\": {}}"},{"title":"Inspect unknown API response keys","prompt":"I got this JSON back from an external API and want to quickly see what the first 3 keys are to understand the structure: {\"response_code\": 200, \"message\": \"ok\", \"items\": [], \"cursor\": null, \"total\": 50}"}],"resultDescription":"Returns the first 3 keys found in the submitted JSON object, along with tier-2 diagnostic metadata such as processing status, key count, and enriched output details about the extraction operation.","failureModes":["Invalid JSON input causes parse error and non-200 response","Empty JSON object returns empty key list","Payment failure via x402 returns 402 status blocking execution","Malformed request body results in processing error","Object with fewer than 3 keys returns only available keys"],"whenToPreferThis":"Choose this endpoint when you need a deterministic, low-cost utility to extract the first 3 keys from a JSON object, especially in agent pipelines where predictable key-slicing behavior and diagnostic metadata at tier 2 are required. It is ideal for lightweight JSON inspection tasks where you want a fixed-parameter operation without implementing custom logic.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-18T00:30:58.630Z","isFirstParty":false,"canonicalSlug":"one-engine-json-first-keys-extractor-p3-t2-a1da435d"}