{"uid":"cap_nh7Bx0hn7nnL38C9XjkU8","slug":"skills-bankofuniverse-org-3d1315d7","name":"Chainlink VRF Random Number Generator","description":"","url":"https://skills.bankofuniverse.org/cos/crypto/chainlink/random","method":"POST","headers":{},"bodySchema":{"type":"object","required":["maxValue","numWords"],"properties":{"maxValue":{"type":"number"},"numWords":{"type":"number"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.000500","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","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":"$0.000500/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_u0yQEeCkRWfCKkLmlXk0C","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.0005","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Generates a cryptographically secure, verifiable random number using Chainlink's Verifiable Random Function (VRF) on-chain","exampleAgentPrompt":"Give me a verifiable random number using Chainlink VRF — I need it for a provably fair NFT lottery draw, with a cryptographic proof I can verify on-chain.","exampleUseCases":null,"resultDescription":"Returns a cryptographically secure random number generated via Chainlink's Verifiable Random Function, along with a VRF proof that can be independently verified to confirm the result was not manipulated","failureModes":["Invalid or malformed request body — HTTP 400","Payment not provided or insufficient — HTTP 402","Chainlink VRF service unavailable or timeout — HTTP 503","Internal server error during randomness generation — HTTP 500","Rate limit exceeded — HTTP 429"],"whenToPreferThis":"Choose this endpoint when you need a tamper-proof, verifiable random number with an on-chain proof — ideal for NFT mints, lotteries, games, or any DeFi use case requiring auditable randomness. Prefer over pseudo-random alternatives when fairness must be publicly demonstrable.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:40:26.822Z","isFirstParty":false}