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Soren Verifiable Randomness Oracle
x402
Soren Verifiable Randomness Oracle is a paid API for AI agents from soren.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).
Returns a publicly verifiable, attested random value from the drand League of Entropy beacon for a specific round or the latest round.
Price / call$0.01
Success—
StatusUnknown
How this service works
Publicly verifiable randomness from the drand League of Entropy beacon, attested and timestamped. Use it for a fair draw between parties who do not trust each other: a distributed network emits one signed value every 30 seconds and no participant, Soren included, can choose or predict it. Soren refuses to attest a round that does not verify, and you can check the same round yourself at api.drand.sh.
Output
A signed, timestamped attestation containing the drand round number, the random value emitted by the League of Entropy network for that round, a cryptographic signature, and the timestamp — all of which can be independently verified at api.drand.sh using the same round number.
Example use cases
Fair lottery winner selection
“I need to pick a winner from 500 contest entries in a way that's completely tamper-proof — can you get a fresh verifiable random number from the drand beacon that I can share publicly so anyone can confirm the draw was fair?”
Auditable NFT trait randomization
“I'm minting an NFT collection tonight and need a random seed that buyers can independently verify wasn't chosen by me — fetch round 6391052 from the drand oracle so I can publish the proof alongside the mint.”
Multi-party game random seed
“We're running an online game tournament and the players don't trust each other or us to provide the randomness — get the latest attested drand beacon value so everyone can verify the seed was unmanipulated before the match starts.”
Technical details
Endpoint
GEThttps://soren.com/v1/oracle/random?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need randomness that must be verifiable and auditable by all parties without trusting any single participant — ideal for lotteries, giveaways, games, or any multi-party scenario where the source of randomness is contested. Prefer it over pseudo-random generators or centralized oracles when proof-of-fairness is a requirement. The 30-second round cadence means you can commit to a future round before the value is known, enabling pre-commitment schemes.
Side effects
- Requested round does not exist or is in the future — Soren returns an error and refuses to attest
- Drand network temporarily unavailable — upstream fetch fails
- Round verification fails cryptographically — Soren refuses to attest and returns an error rather than an unverified value
- Invalid round parameter format — schema validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | object |
Output
Schema · Response
{
"type": "json",
"example": {
"value": {
"round": "<int>",
"as_float": "<0..1>",
"as_uint53": "<int>",
"signature": "<bls signature hex>",
"randomness": "<64 hex chars>",
"verify_yourself": "https://api.drand.sh/public/<round>"
},
"source": {
"name": "drand / League of Entropy"
},
"provenance": {
"signature": {
"value": "<base64>",
"algorithm": "Ed25519"
},
"observed_at": "<ISO-8601 UTC>",
"upstream_sha256": "<hex>"
}
}
}Tags
x402
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