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Delx Commerce — Seeded Weighted Sample
x402
Delx Commerce — Seeded Weighted Sample is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).
Performs a reproducible weighted random selection of N items from a list using a deterministic seed, returning verifiable results with no data retention.
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.
Output
Returns a JSON object containing the sampled items array and count, a schema identifier, a 'pass' status, an evidence block with retained=false, the SHA-256 hash of the input, external_calls count (always 0), and an operation label — allowing the caller to verify correctness and confirm no data was stored.
Example use cases
Weighted A/B variant assignment
“I need to assign a user to one of three feature variants — 'control', 'variantA', 'variantB' — with weights 60, 25, 15. Use seed 'user-id-8821' so the assignment is reproducible and verifiable.”
Reproducible prize draw for a campaign
“We have 5 prize tiers with weights [100,50,20,5,1]. Draw 2 winners from ['bronze','silver','gold','platinum','diamond'] using seed 'campaign-oct-2024' so anyone can verify the result.”
Probabilistic task routing for an agent fleet
“Route an incoming job to one of our agents — ['agent1','agent2','agent3'] — based on their capacity weights [3,5,2]. Use seed 'job-id-4492' so the routing decision is auditable.”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/seeded-weighted-sample?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a reproducible, verifiable, weighted random selection that can be audited — particularly in agentic workflows where fairness, transparency, or replayability matter. Prefer it over in-process random sampling when you need cryptographic evidence of the draw (via input SHA-256), guaranteed no data retention, and deterministic replay from the same seed. At $0.001 USDC per call with no signup required, it is ideal for lightweight decision steps in automated agent pipelines.
Side effects
- Mismatched items/weights array lengths may cause a validation error
- Count exceeding the number of available items may return an error or empty result
- Weights array containing non-integer values will fail schema validation
- Items array exceeding 256 entries will be rejected
- Missing required fields (items or weights) will produce a 400-level error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| seed | string | Seed supplied to Seeded Weighted Sample; used only for this bounded calculation and processed in memory without retention. |
| count | integer | Count supplied to Seeded Weighted Sample; used only for this bounded calculation and processed in memory without retention. |
| items | array | Items supplied to Seeded Weighted Sample; used only for this bounded calculation and processed in memory without retention. |
| weights | array | Weights supplied to Seeded Weighted Sample; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"count": 2,
"items": [
"a",
"c"
]
},
"schema": "delx/util-seeded-weighted-sample/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "4b94fab1aa6acc04be7b55390f0c8075b8e83c859b6ceaccfd3469af77bb03fd",
"external_calls": 0
},
"operation": "seeded_decision:seeded_weighted_sample"
}
}Tags
x402
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