{"uid":"cap_9QCT9X9k0GKLO_kykJsBS","slug":"delx-seeded-coin-flip-8f2ef24b","name":"Delx Seeded Coin Flip","description":"Seeded Coin Flip: Seeded Coin Flip generates a reproducible sequence of binary outcomes from bounded caller-supplied values without an external provider. Call Seeded Coin Flip when an agent needs a reproducible decision that another run can independently replay. Returns the deterministic selection plus seed provenance, population bounds, and the operation-specific outcome for Seeded Coin Flip as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party, stateless, memory-on…","url":"https://api.delx.ai/api/v1/x402/seeded-coin-flip","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"seed":{"type":"string","maxLength":8192,"description":"Seed supplied to Seeded Coin Flip; used only for this bounded calculation and processed in memory without retention."},"flips":{"type":"integer","description":"Flips supplied to Seeded Coin Flip; used only for this bounded calculation and processed in memory without retention."}}},"responseSchema":{"type":"json","example":{"result":{"flips":["heads","heads","heads","heads","tails","tails","tails","heads"],"heads":5,"tails":3},"schema":"delx/util-seeded-coin-flip/v1","status":"pass","evidence":{"retained":false,"input_sha256":"e2c71a78a4e46fc961d346ebdb850d06889aaf4b959c10e3a8ad8cdb0a10a036","external_calls":0},"operation":"seeded_decision:seeded_coin_flip"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_RP_wUatXEbFTUctUIbujY","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Performs a deterministic, seeded sequence of coin flips returning heads/tails outcomes with a cryptographic audit trail.","exampleAgentPrompt":"Flip a coin 8 times using the seed 'morning42' and show me the full sequence of heads and tails results.","exampleUseCases":[{"title":"Reproducible lottery draw for agent","prompt":"Use the seed 'contest2024finale' to flip a coin 16 times — I need the full heads/tails sequence so I can reproduce the draw later if someone challenges it."},{"title":"Seeded game randomness check","prompt":"Run 10 coin flips with the seed 'player_session_77' so I can deterministically assign random starting bonuses to players and verify the outcome is fair."},{"title":"Binary decision tiebreaker","prompt":"I need to break a tie between two options — flip a coin 5 times with the seed 'tiebreak_opt' and tell me how many heads vs tails came up."}],"resultDescription":"Returns a JSON object containing an array of flip outcomes (each 'heads' or 'tails'), total heads count, total tails count, the operation schema identifier, a pass/fail status, and an evidence block confirming no data was retained and providing the SHA-256 hash of the input and a count of zero external calls made.","failureModes":["Seed exceeds 8192 character limit — request rejected","Flips parameter is non-integer or negative — validation error","Malformed JSON body — 400 bad request","Payment not attached or insufficient — 402 payment required","Service temporarily unavailable — 5xx error"],"whenToPreferThis":"Choose this endpoint when you need deterministic, reproducible coin flip randomness tied to a specific seed — especially when auditability matters (the response includes a SHA-256 of inputs and confirms no external calls or data retention). It is preferable over general randomness APIs when you need a verifiable, tamper-evident paper trail for agent decisions, games, lotteries, or fair selection processes. Use it over true random generators when reproducibility is a requirement.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:59:08.535Z","isFirstParty":false}