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Chainlink VRF Random Number Generator
x402
Chainlink VRF Random Number Generator is a paid API for AI agents from skills.bankofuniverse.org, paid per call via x402, $0.000500/call, status unknown (last checked 2026-09-14).
Generates a cryptographically secure, verifiable random number using Chainlink's Verifiable Random Function (VRF) on-chain
Price / call$0.000500
Success—
StatusUnknown
Output
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
Example use cases
Example prompt
“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.”
Technical details
Endpoint
POSThttps://skills.bankofuniverse.org/cos/crypto/chainlink/randomWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| maxValuerequired | number | |
| numWordsrequired | number |
Tags
x402
Reviews
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