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Delx Seeded Percentage Rollout
x402
Delx Seeded Percentage Rollout 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 decides whether a subject is included in a percentage rollout based on a seed and percentage threshold, returning a boolean result and bucket value.
Price / call$0.001
Success—
StatusUnknown
How this service works
Seeded Percentage Rollout: Seeded Percentage Rollout evaluates stable inclusion in a percentage rollout from bounded caller-supplied values without an external provider. Call Seeded Percentage Rollout 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 Percentage Rollout as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base.…
Output
Returns a JSON object with an 'included' boolean indicating whether the subject falls within the specified percentage, a 'bucket_percent' float showing the subject's computed bucket value, an operation name, a schema version, a status field ('pass'), and evidence including input SHA-256 hash, a 'retained: false' flag confirming no data is stored, and an external_calls count.
Example use cases
Gradual feature flag rollout
“I'm rolling out a new checkout flow to 10% of users — check if customer ID 'cust_44902' should see it, using 'checkout-v2' as the seed and 10 as the percentage.”
Canary deployment traffic split
“For my canary deployment called 'api-v3-canary', check if server instance 'node-17' falls within the 5% slice — use 'api-v3-canary' as the seed and 5 as the percentage.”
Reproducible A/B experiment assignment
“I need to reproducibly assign user 'alice@example.com' to experiment group A or B for my 'summer-promo' test — check if they're in the 50% bucket using 'summer-promo' as the seed.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/seeded-percentage-rolloutWhen to prefer
Choose this endpoint when you need a deterministic, reproducible bucketing decision for feature flags, A/B tests, or gradual rollouts — especially when you need auditability (SHA-256 evidence) and a guarantee that no input data is retained. Prefer this over a random number approach when you need the same subject to always land in the same bucket for a given seed, or when you need a lightweight, stateless computation without managing your own hashing logic.
Side effects
- Missing required fields (seed, subject, or percentage) return a validation error
- Percentage value out of 0–100 range may return an error or unexpected behavior
- Network timeout or service unavailability returns a connection error
- Invalid data types (e.g. non-numeric percentage) cause schema validation failure
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| seed | string | Seed supplied to Seeded Percentage Rollout; used only for this bounded calculation and processed in memory without retention. |
| subject | string | Subject supplied to Seeded Percentage Rollout; used only for this bounded calculation and processed in memory without retention. |
| percentage | number | Percentage supplied to Seeded Percentage Rollout; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"included": false,
"bucket_percent": 18.47354188710196
},
"schema": "delx/util-seeded-percentage-rollout/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "81678a13647db7a4f1b151b8288397c3c5f872a52bed79342f44fc6eb2ea00fe",
"external_calls": 0
},
"operation": "seeded_decision:seeded_percentage_rollout"
}
}Tags
x402
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