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Delx Commerce — Seeded Permutation Index
x402
Delx Commerce — Seeded Permutation Index is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).
Given a seed string and a count, deterministically computes a bounded permutation index using a seeded algorithm, with verifiable evidence of 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 computed permutation_index (integer), a cryptographic flag indicating whether cryptographic methods were used, a status of 'pass', and an evidence block with the SHA-256 hash of the input, a flag confirming no data was retained, and a count of zero external calls made — enabling full auditability of the computation.
Example use cases
Reproducible agent decision slot selection
“I need to deterministically pick a slot index from 500 options using the seed 'campaign-batch-run-7' — give me the permutation index so I get the same result every time I run this.”
Fair verifiable lottery position assignment
“Assign a verifiable position index within 10000 entries for the seed 'user-id-alpha-9932' — I need proof that no data was retained and the result is reproducible.”
Seeded A/B test variant selection
“Given the seed 'experiment-cohort-blue-2024' and 4 variants, compute which permutation index to assign so my A/B test bucketing is deterministic and auditable.”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/seeded-permutation-index?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a deterministic, reproducible permutation index derived from a seed with verifiable evidence of no data retention — particularly in agent workflows requiring auditable pseudorandom selection, fair slot assignment, or reproducible decision-making without trusting an opaque RNG. Prefer it over in-process RNG when you need an externally verifiable audit trail or when cryptographic-grade evidence of computation honesty matters.
Side effects
- Missing or empty seed string causes validation error
- permutation_count not provided or non-integer causes rejection
- permutation_count of zero or negative may produce undefined behavior
- Payment failure via x402 protocol blocks the call
- Seed string exceeding 8192 characters is rejected
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| seed | string | Seed supplied to Seeded Permutation Index; used only for this bounded calculation and processed in memory without retention. |
| permutation_count | integer | Permutation Count supplied to Seeded Permutation Index; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"cryptographic": false,
"permutation_index": 630
},
"schema": "delx/util-seeded-permutation-index/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "937802095c874e8dbf650e4af5cd07ddb5c7691d8eb727c6466e648e0050b056",
"external_calls": 0
},
"operation": "seeded_decision:seeded_permutation_index"
}
}Tags
x402
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