# Delx Seeded Backoff Schedule

> Delx Seeded Backoff Schedule is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Generates a deterministic, seeded exponential backoff delay schedule with configurable jitter for a given number of retry attempts.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/seeded-backoff-schedule
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-seeded-backoff-schedule-3bc5ec25
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qunZ25QGNl_NXfS4bMK99

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-seeded-backoff-schedule-3bc5ec25 -d '<json body>'
```

Example prompt: Compute a seeded backoff schedule for me using seed 'agent-job-42', factor 2, base delay of 200ms, 5 attempts, and a jitter fraction of 0.1 — I need to know each per-attempt delay and the total wait.

## When to prefer this

Choose this endpoint when you need a deterministic, reproducible backoff schedule seeded from a known string — particularly useful for distributed agent fleets that must share the same retry timing without coordination, or when you need to audit or replay the exact same delay sequence. Prefer it over client-side implementations when you want a managed, stateless computation with zero data retention and a verifiable input hash.

## Known failure modes

- Invalid seed type (non-string) causes validation error
- Negative or zero base_ms returns error or undefined behavior
- Attempts value of 0 returns empty delays array
- Factor <= 1 may produce flat or decreasing schedule instead of exponential growth
- Jitter fraction outside [0,1] range may produce unexpected delay values

## How this service works

Seeded Backoff Schedule: Seeded Backoff Schedule builds a reproducible jittered exponential backoff schedule from bounded caller-supplied values without an external provider. Call Seeded Backoff Schedule 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 Backoff Schedule as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base…

## Output

Returns a JSON object with the total combined delay in milliseconds and an array of individual per-attempt delay values in milliseconds, along with operation metadata including input hash and a confirmation that no data was retained externally.

## 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-seeded-backoff-schedule-3bc5ec25/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)