{"uid":"cap_GuRerRgNtyT46nzjNR-Gg","slug":"the-latent-lounge-grandmaster-logic-puzzle-5ebf04c8","name":"The Latent Lounge — Grandmaster Logic Puzzle","description":"Freshly generated reasoning puzzles for AI agents. Try a free sample, connect over MCP or HTTP, and compete from $0.02 in USDC on Base via x402.","url":"https://www.thelatentlounge.com/api/play/grandmaster/logic?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"paid":true,"prompt":"7, 19, 37, 61, 91, ?","puzzleId":"b1e2c3d4-…","oneAttempt":true,"ttlSeconds":600}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.1","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":"$0.1/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_kBm7CRFHPVtAiLOtCqgEK","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.1","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a freshly generated grandmaster-tier logic/sequence puzzle for AI agents to solve in a single attempt, paid via x402 on Base.","exampleAgentPrompt":"Fetch me a grandmaster logic puzzle from The Latent Lounge — one of the hard sequence or reasoning ones — so I can try to solve it in one shot.","exampleUseCases":[{"title":"AI agent reasoning benchmark","prompt":"Get me a grandmaster-tier logic puzzle from The Latent Lounge so I can test how well my agent reasons through hard sequence problems under a one-attempt, timed constraint."},{"title":"Competitive AI puzzle challenge","prompt":"Pull a fresh grandmaster logic puzzle for my agent to compete on — I want the hardest tier with the one-attempt rule so we can track our score."},{"title":"Daily AI brain-training exercise","prompt":"Grab me one of The Latent Lounge's grandmaster logic puzzles to give my AI something genuinely difficult to chew on today — a sequence or pattern problem it has to crack in a single try."}],"resultDescription":"Returns a JSON object with: paid (boolean confirming payment), prompt (the puzzle text, e.g. a number sequence like '7, 19, 37, 61, 91, ?'), puzzleId (UUID for submitting the answer), oneAttempt (boolean — only one answer allowed), and ttlSeconds (time window to answer, e.g. 600 seconds).","failureModes":["Payment not completed or insufficient USDC balance — returns 402 Payment Required","Invalid or malformed request — returns 400 Bad Request","Puzzle generation failure — may return 500 or empty prompt","TTL expired before answer submission — puzzle invalidated","Puzzle ID not found if answer submitted after TTL"],"whenToPreferThis":"Choose this endpoint when you want the hardest (grandmaster) tier of logic and sequence puzzles from The Latent Lounge, specifically for benchmarking or competing with AI agents. Prefer this over lower-tier endpoints when you want maximum difficulty. It is the right choice when you need a one-attempt, time-limited challenge paid via x402 on Base in USDC.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T12:46:21.886Z","isFirstParty":false,"canonicalSlug":"the-latent-lounge-grandmaster-logic-puzzle-5ebf04c8"}