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Delx Commerce Seeded Pairing
x402
Delx Commerce Seeded Pairing 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).
Deterministically pairs a list of participants into matched pairs (with optional bye) using a seed value, returning verifiable, reproducible results.
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 with a 'pairs' array of two-element arrays (each a matched pair), an optional 'bye' field naming the participant who sits out, an operation identifier, a schema version string, a status of 'pass', and an evidence block containing the SHA-256 hash of the input, a flag confirming no data was retained, and a count of zero external calls — enabling full verifiability of the result.
Example use cases
Tournament bracket generation
“I have 8 players for a chess tournament: Magnus, Hikaru, Fabiano, Wesley, Ding, Anish, Ian, and Levon. Use the seed 'chess-open-2024' to pair them up for the first round.”
Team partner assignment
“Match these 6 workshop attendees into pairs for the pair-programming exercise — Jordan, Taylor, Morgan, Casey, Riley, and Avery — using the seed 'workshop-day1'.”
Randomized debate matchups
“I need verifiable, reproducible debate pairings for these 5 students: Sam, Jamie, Alex, Robin, and Drew. Use seed 'debate-semifinal' so I can prove the matchups weren't manipulated.”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/seeded-pairing?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need deterministic, reproducible, and verifiably fair pairings — especially when an audit trail matters (e.g. proving no post-hoc manipulation). It is ideal for tournament brackets, partner assignments, and any matchmaking scenario where the same seed + participant list must always yield the same result. Prefer it over ad-hoc random shuffles when reproducibility or verifiability is a requirement, and over complex matchmaking engines when the only constraint is seeded randomness.
Side effects
- Participants list exceeds 256 items — request rejected
- Seed or participant string exceeds 8192 characters — validation error
- Empty participants list — undefined pairing behavior or error response
- Malformed JSON body — HTTP 400 bad request
- Payment not included or insufficient — HTTP 402 payment required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| seed | string | Seed supplied to Seeded Pairing; used only for this bounded calculation and processed in memory without retention. |
| participants | array | Participants supplied to Seeded Pairing; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"bye": "b",
"pairs": [
[
"d",
"a"
],
[
"c",
"e"
]
]
},
"schema": "delx/util-seeded-pairing/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "0bfb1a13590bf6beabbd01835232e976edb6c53d8cd2ab2a61049c2b2b57645a",
"external_calls": 0
},
"operation": "seeded_decision:seeded_pairing"
}
}Tags
x402
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