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Proof Random API – drand Beacon Sampler
x402
Proof Random API – drand Beacon Sampler is a paid API for AI agents from proof-random-api.pn-26f.workers.dev, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-21).
Relays a verifiable random beacon from the drand quicknet network with nonce-bound reproducible sampling, requiring client-side BLS signature verification.
Price / call$0.1
Success—
StatusUnknown
How this service works
A free drand quicknet beacon relay with nonce-bound reproducible sampling. Client-side BLS verification required.
Output
Returns a drand quicknet beacon response including a nonce-bound random value and BLS signature data that the client must verify locally. The sample is reproducible given the same query and nonce, enabling auditable and tamper-evident randomness.
Example use cases
Auditable lottery draw randomness
“I need a cryptographically verifiable random sample for our lottery draw — use the query 'lottery-round-42' with a quick depth so I can reproduce and verify it with BLS later.”
Research experiment seeding
“Can you get me a nonce-bound reproducible random beacon from the drand relay for my research query 'trial-cohort-7' at deep depth? I need to be able to verify the output independently.”
Smart contract fairness audit
“Fetch a drand quicknet beacon for the query 'nft-drop-session-9' at quick depth — I need the verifiable randomness to audit the fairness of our NFT distribution.”
Technical details
Endpoint
POSThttps://proof-random-api.pn-26f.workers.dev/v1/research?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need cryptographically verifiable, auditable, and reproducible randomness backed by the drand decentralized network — particularly for research, fairness audits, lotteries, or smart contract seeding where BLS-verifiable provenance matters. Prefer it over pseudo-random APIs when tamper-evidence and independent client-side verification are required.
Side effects
- Invalid or missing query parameter returns a 400 error
- Payment not received or invalid x402 payment header results in 402 response
- Invalid depth enum value causes schema validation failure
- drand network unavailability may cause upstream timeout or 503
- Client-side BLS verification failure indicates potential tampering or misconfigured beacon data
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| depth | string | |
| queryrequired | string |
Tags
x402
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