# Delx Commerce — Seeded Canary Sequence

> Delx Commerce — Seeded Canary Sequence 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 assigns a list of subjects to ordered stages using a seed, returning a reproducible staged grouping with cryptographic evidence of non-retention.

## Facts

- Endpoint: POST https://commerce.delx.ai/api/v1/x402/seeded-canary-sequence?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-commerce-seeded-canary-sequence-d146d0f3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EhPgTlxgAjkYonK8o4sVL

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability delx-commerce-seeded-canary-sequence-d146d0f3 -d '<json body>'
```

Example prompt: Using the seeded canary sequence, assign these 5 services — ['svc-a', 'svc-b', 'svc-c', 'svc-d', 'svc-e'] — to three stages of sizes [1, 2, 2] using the seed 'release-42', and give me the reproducible stage groupings.

## When to prefer this

Choose this endpoint when you need a deterministic, reproducible, verifiable assignment of subjects to ordered stages — especially for canary deployments, staged feature rollouts, or reproducible experiment group partitioning — where cryptographic evidence of non-data-retention matters. Prefer it over local random shuffles when you want pay-per-result accountability and a verifiable audit trail (input hash, zero external calls) without storing any input data server-side.

## Known failure modes

- Invalid or missing seed causes malformed request error
- stage_sizes array sum exceeds subjects count, leading to partial or empty stages
- subjects array exceeds 256-item limit returns validation error
- Payment failure via x402 protocol blocks execution before computation
- Malformed input types (non-string subjects or non-integer stage sizes) return schema validation errors

## 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 a 'stages' array where each element is a list of subjects assigned to that stage, an 'unassigned' array for any subjects not fitting a stage, the operation name, schema version, a 'pass' status, and a cryptographic evidence block including the SHA-256 hash of the input, confirmation that no data was retained, and a count of zero external calls made.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "seed": {
   "type": "string",
   "maxLength": 8192,
   "description": "Seed supplied to Seeded Canary Sequence; used only for this bounded calculation and processed in memory without retention."
  },
  "subjects": {
   "type": "array",
   "items": {
    "type": "string",
    "maxLength": 8192
   },
   "maxItems": 256,
   "description": "Subjects supplied to Seeded Canary Sequence; used only for this bounded calculation and processed in memory without retention."
  },
  "stage_sizes": {
   "type": "array",
   "items": {
    "type": "integer"
   },
   "maxItems": 256,
   "description": "Stage Sizes supplied to Seeded Canary Sequence; used only for this bounded calculation and processed in memory without retention."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "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"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-commerce-seeded-canary-sequence-d146d0f3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from commerce.delx.ai](https://www.zero.xyz/host/commerce.delx.ai/llms.txt)