# Delx Commerce — Seeded Backoff Schedule

> Delx Commerce — Seeded Backoff Schedule 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).

Computes a deterministic, jitter-seeded exponential backoff delay schedule given a seed, factor, base interval, and attempt count

## Facts

- Endpoint: POST https://commerce.delx.ai/api/v1/x402/seeded-backoff-schedule?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-backoff-schedule-6e17709c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vu9noWyZncI_A4NBqAibm

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-backoff-schedule-6e17709c -d '<json body>'
```

Example prompt: Calculate a seeded backoff schedule for me using seed 'agent-retry-42', a factor of 2.0, base delay of 200ms, 5 attempts, and a jitter fraction of 0.25.

## When to prefer this

Choose this endpoint when you need a cryptographically verifiable, reproducible backoff schedule with deterministic jitter — especially in multi-agent or distributed systems where all nodes must agree on retry timing from a shared seed. Prefer it over ad-hoc client-side implementations when auditability (input hash, no retention) and pay-per-use pricing without signup are priorities.

## Known failure modes

- Invalid or missing seed string may produce an error or undefined behavior
- Non-positive factor or base_ms values may result in invalid delay sequences
- Negative or zero attempts value may return an empty delays array
- Jitter fraction outside [0,1] range may cause computation errors
- Payment failure via x402 will prevent the API from returning a result

## 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 the total cumulative delay in milliseconds, an array of per-attempt delay values in milliseconds, an SHA-256 hash of the input for verification, confirmation that no data was retained, a count of external calls made (always 0), and a status field indicating success.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "seed": {
   "type": "string",
   "maxLength": 8192,
   "description": "Seed supplied to Seeded Backoff Schedule; used only for this bounded calculation and processed in memory without retention."
  },
  "factor": {
   "type": "number",
   "description": "Factor supplied to Seeded Backoff Schedule; used only for this bounded calculation and processed in memory without retention."
  },
  "base_ms": {
   "type": "integer",
   "description": "Base Ms supplied to Seeded Backoff Schedule; used only for this bounded calculation and processed in memory without retention."
  },
  "attempts": {
   "type": "integer",
   "description": "Attempts supplied to Seeded Backoff Schedule; used only for this bounded calculation and processed in memory without retention."
  },
  "jitter_fraction": {
   "type": "number",
   "description": "Jitter Fraction supplied to Seeded Backoff Schedule; used only for this bounded calculation and processed in memory without retention."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {
   "total_ms": 8029,
   "delays_ms": [
    228,
    469,
    1031,
    1999,
    4302
   ]
  },
  "schema": "delx/util-seeded-backoff-schedule/v1",
  "status": "pass",
  "evidence": {
   "retained": false,
   "input_sha256": "234a28ee3af60f37f2134c3978d081030564a653c3b3886bb99cfb5db207b1ab",
   "external_calls": 0
  },
  "operation": "seeded_decision:seeded_backoff_schedule"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-commerce-seeded-backoff-schedule-6e17709c/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)