{"uid":"cap_eXY7DkW-_I0x-RAMHJ-Vf","slug":"openrng-vdf-random-number-generator-f300ac9c","name":"OpenRNG VDF Random Number Generator","description":"Cryptographically verifiable random number. VDF-proven entropy (Wesolowski 2048-bit), pool-served sub-2ms latency.","url":"https://x402.openrng.io/v1/rng/latest","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":{}}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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_60Ja68meoFX3z8HBKj6wm","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":"Returns a cryptographically verifiable random number backed by Verifiable Delay Function (Wesolowski 2048-bit) proof with sub-2ms pool-served latency","exampleAgentPrompt":"Give me a cryptographically verifiable random number with its VDF proof right now — I need trustless entropy I can independently verify.","exampleUseCases":[{"title":"Provably fair lottery draw","prompt":"I need a tamper-proof random number to pick the winner of my lottery — give me one with a cryptographic proof so participants can verify the draw was fair."},{"title":"On-chain randomness seed","prompt":"Fetch me a VDF-proven random seed I can use as unpredictable entropy for my smart contract — something with a Wesolowski proof attached so it can't be gamed."},{"title":"Unbiased random assignment for research","prompt":"I'm randomly assigning participants to study groups and need a verifiable random number with a cryptographic proof that the selection wasn't manipulated."}],"resultDescription":"A cryptographically verifiable random number accompanied by a Wesolowski VDF proof (2048-bit), allowing independent verification that the entropy was not manipulated. Delivered with sub-2ms pool-served latency.","failureModes":["Payment not received or x402 payment protocol failure — returns 402 Payment Required","Service unavailable or pool exhausted — returns 503","Malformed request — returns 400 with error detail","Network timeout exceeding SLA — no result returned"],"whenToPreferThis":"Choose this endpoint when you need cryptographically verifiable randomness with an attached VDF proof (Wesolowski 2048-bit) that any party can independently verify — ideal for provably fair games, lotteries, on-chain randomness seeds, or any use case requiring tamper-proof, trustless entropy. Prefer over pseudo-random generators when auditability and non-manipulability are required. The sub-2ms latency makes it suitable for real-time applications.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:31:55.212Z","isFirstParty":false}