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Delx Seeded Coin Flip
x402
Delx Seeded Coin Flip 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).
Performs a deterministic, seeded sequence of coin flips returning heads/tails outcomes with a cryptographic audit trail.
Price / call$0.001
Success—
StatusUnknown
How this service works
Seeded Coin Flip: Seeded Coin Flip generates a reproducible sequence of binary outcomes from bounded caller-supplied values without an external provider. Call Seeded Coin Flip 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 Coin Flip as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party, stateless, memory-on…
Output
Returns a JSON object containing an array of flip outcomes (each 'heads' or 'tails'), total heads count, total tails count, the operation schema identifier, a pass/fail status, and an evidence block confirming no data was retained and providing the SHA-256 hash of the input and a count of zero external calls made.
Example use cases
Reproducible lottery draw for agent
“Use the seed 'contest2024finale' to flip a coin 16 times — I need the full heads/tails sequence so I can reproduce the draw later if someone challenges it.”
Seeded game randomness check
“Run 10 coin flips with the seed 'player_session_77' so I can deterministically assign random starting bonuses to players and verify the outcome is fair.”
Binary decision tiebreaker
“I need to break a tie between two options — flip a coin 5 times with the seed 'tiebreak_opt' and tell me how many heads vs tails came up.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/seeded-coin-flipWhen to prefer
Choose this endpoint when you need deterministic, reproducible coin flip randomness tied to a specific seed — especially when auditability matters (the response includes a SHA-256 of inputs and confirms no external calls or data retention). It is preferable over general randomness APIs when you need a verifiable, tamper-evident paper trail for agent decisions, games, lotteries, or fair selection processes. Use it over true random generators when reproducibility is a requirement.
Side effects
- Seed exceeds 8192 character limit — request rejected
- Flips parameter is non-integer or negative — validation error
- Malformed JSON body — 400 bad request
- Payment not attached or insufficient — 402 payment required
- Service temporarily unavailable — 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| seed | string | Seed supplied to Seeded Coin Flip; used only for this bounded calculation and processed in memory without retention. |
| flips | integer | Flips supplied to Seeded Coin Flip; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"flips": [
"heads",
"heads",
"heads",
"heads",
"tails",
"tails",
"tails",
"heads"
],
"heads": 5,
"tails": 3
},
"schema": "delx/util-seeded-coin-flip/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "e2c71a78a4e46fc961d346ebdb850d06889aaf4b959c10e3a8ad8cdb0a10a036",
"external_calls": 0
},
"operation": "seeded_decision:seeded_coin_flip"
}
}Tags
x402
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