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Delx Seeded Canary Sequence
x402
Delx Seeded Canary Sequence is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-19).
Deterministically assigns subjects to staged groups using a seed, producing a reproducible canary/rollout sequence with no data retention.
Price / call$0.001
Success—
StatusUnknown
How this service works
Seeded Canary Sequence: Seeded Canary Sequence orders subjects reproducibly for a staged canary rollout from bounded caller-supplied values without an external provider. Call Seeded Canary Sequence 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 Canary Sequence as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First…
Output
Returns a JSON object with a 'stages' array where each element is a list of subjects assigned to that stage in order, an 'unassigned' array for any overflow, an evidence block containing an input SHA-256 hash and confirmation of no data retention or external calls, plus operation metadata and a pass/fail status.
Example use cases
Staged feature rollout for agents
“I need to roll out a new capability to my agent fleet gradually — assign these 20 agent IDs to three stages of sizes 2, 8, and 10 using seed 'feature-v2' so the rollout is reproducible.”
Reproducible A/B test group assignment
“Can you bucket these user IDs into two test groups of size 50 and 50 using the seed 'ab-experiment-42'? I need the same assignment every time I run it.”
Canary deployment sequencing for services
“I want to canary-deploy to my microservices in three waves — sizes 1, 3, and 6 — assign these 10 service names to the stages deterministically using seed 'deploy-prod-may'.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/seeded-canary-sequence?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need fully deterministic, reproducible partitioning of a subject list into ordered stages — particularly for canary rollouts, phased deployments, or A/B test assignments where the same seed must always produce the same grouping. Prefer it over random shufflers or stateful assignment services when auditability (via SHA-256 evidence hash) and zero data retention are required. It is purpose-built for agent workflows that need staged sequencing without side effects.
Side effects
- Seed exceeds 8192 character limit — request rejected
- Subjects array exceeds 256 items — request rejected
- Stage sizes array exceeds 256 entries — request rejected
- Stage sizes sum exceeds number of subjects — some subjects left unassigned (returned in 'unassigned' field)
- Malformed JSON body — HTTP 400 error
- Payment not provided or insufficient USDC — HTTP 402 error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| seed | string | Seed supplied to Seeded Canary Sequence; used only for this bounded calculation and processed in memory without retention. |
| subjects | array | Subjects supplied to Seeded Canary Sequence; used only for this bounded calculation and processed in memory without retention. |
| stage_sizes | array | Stage Sizes supplied to Seeded Canary Sequence; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"stages": [
[
"s3"
],
[
"s2"
],
[
"s4",
"s1"
]
],
"unassigned": []
},
"schema": "delx/util-seeded-canary-sequence/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "b7c4baf8edc708c4cf95b7a38dca0834e87950d8893128fa9f9eccacac92ccce",
"external_calls": 0
},
"operation": "seeded_decision:seeded_canary_sequence"
}
}Tags
x402
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