{"uid":"cap_i2vM-kpNYLU6BlTkOhb52","slug":"provably-fair-draw-verifier-ce9560b4","name":"Provably Fair Draw Verifier","description":"Recompute a draw and check sha256(server_seed)==commit. ?round=1&client_seed=s&nonce=1&min=1&max=100","url":"https://pyfile-agent.taile3ff35.ts.net:10000/data/fair/verify","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{}}}},"output":{"type":"object"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_9z0sHoP924y8rSZbZe5fP","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Recomputes a provably-fair random draw and verifies that sha256(server_seed) matches the original commit, confirming the result was not manipulated.","exampleAgentPrompt":"Can you verify that round 42 of the lottery was fair? The client seed is 'myseed123', nonce is 7, and the draw range was 1 to 100 — I want to confirm the server seed's sha256 matches the original commit.","exampleUseCases":[{"title":"Audit a lottery round result","prompt":"I participated in round 15 of that provably fair lottery. My client seed was 'abc456', nonce was 3, and the range was 1 to 50. Can you verify the draw was legitimate and that the server seed hashes correctly to the original commitment?"},{"title":"Catch potential house cheating","prompt":"I'm suspicious about the outcome of round 88 — can you recompute the draw for me? Client seed is 'faircheck', nonce is 1, range was 1 to 6, and I want to know if sha256 of the server seed actually matches the commit they published."},{"title":"Transparency audit for gaming platform","prompt":"Before I keep playing on this platform, can you independently verify round 200 was fair? Use client seed 'verifytest', nonce 5, range 1 to 100, and confirm whether the server seed's hash matches their original commitment."}],"resultDescription":"Returns the recomputed draw result along with the sha256 hash of the server seed and a boolean or status indicating whether that hash matches the original commit — confirming or refuting that the random outcome was pre-committed and untampered.","failureModes":["Missing required query parameters (round, client_seed, nonce, min, max) result in an error response","Invalid round number returns no matching draw data","Mismatched sha256 hash indicates a tampered or incorrect server seed — not an API error but a negative verification result","min >= max or invalid range values may return a validation error","Network or payment failure returns HTTP 402 or 5xx"],"whenToPreferThis":"Use this endpoint when you need to cryptographically audit a provably fair random draw and confirm the house did not manipulate the outcome. It is the correct choice when you have a round number, client seed, nonce, and numeric range and want an independent recomputation that checks the sha256(server_seed) == commit invariant. Prefer this over manual hash computation or trusting the platform's own display.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T06:59:15.381Z","isFirstParty":false}