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Delx Seeded Winners Without Replacement
x402
Delx Seeded Winners Without Replacement is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Deterministically select a fixed number of winners from a candidate list using a seed, ensuring no duplicate selections and reproducible results.
Price / call$0.001
Success—
StatusUnknown
How this service works
Seeded Winners Without Replacement: Seeded Winners Without Replacement draws an ordered reproducible winner list without replacement from bounded caller-supplied values without an external provider. Call Seeded Winners Without Replacement when an agent needs a reproducible decision that another run can independently replay. Returns the deterministic selection plus seed provenance, population bounds, and the operation-specific outcome for Seeded Winners Without Replacement as versioned determini…
Output
Returns a JSON object containing the list of selected winners (no duplicates), the count of winners selected, a boolean indicating no monetary claim, the input SHA-256 hash for auditability, confirmation that inputs were not retained, and the number of external calls made (zero).
Example use cases
Reproducible raffle winner selection
“Run a raffle for our newsletter giveaway — pick 2 winners from ['user_101','user_202','user_303','user_404','user_505'] using seed 'newsletter-july-2025' so I can verify the results later.”
A/B test group assignment
“I need to deterministically assign 5 participants to a test group from this list of 20 user IDs using seed 'experiment-v3-batch1' — can you pick them without replacement?”
Random task allocation without repeats
“From this list of 8 available agents ['agent-a','agent-b','agent-c','agent-d','agent-e','agent-f','agent-g','agent-h'], pick 3 to handle today's jobs using seed 'daily-dispatch-20250610' so the assignment is auditable.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/seeded-winners-without-replacementWhen to prefer
Use this endpoint when you need a deterministic, auditable, and reproducible random selection from a candidate list with no repeated picks — especially for lotteries, raffles, A/B assignments, or any governed draw where the same seed must always produce the same winners. Prefer it over stateful or non-deterministic random services when verifiability and zero data retention matter.
Side effects
- winner_count exceeds number of candidates — cannot select more winners than candidates without replacement
- invalid or missing seed causes unpredictable or rejected computation
- candidates array exceeds 256 items limit
- empty candidates array with non-zero winner_count
- malformed input types (e.g. non-integer winner_count)
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| seed | string | Seed supplied to Seeded Winners Without Replacement; used only for this bounded calculation and processed in memory without retention. |
| candidates | array | Candidates supplied to Seeded Winners Without Replacement; used only for this bounded calculation and processed in memory without retention. |
| winner_count | integer | Winner Count supplied to Seeded Winners Without Replacement; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"count": 3,
"winners": [
"d",
"c",
"b"
],
"monetary_claim": false
},
"schema": "delx/util-seeded-winners-without-replacement/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "7854633a204eec63fedb89d8b9c7942b2651237bdee78ebb4e3b8378e7a3d424",
"external_calls": 0
},
"operation": "seeded_decision:seeded_winners_without_replacement"
}
}Tags
x402
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