# Delx Commerce — Seeded Round Robin Start

> Delx Commerce — Seeded Round Robin Start is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).

Deterministically selects a starting index for round-robin distribution given a seed string and a member count, with verifiable no-retention processing.

## Facts

- Endpoint: POST https://commerce.delx.ai/api/v1/x402/seeded-round-robin-start?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-commerce-seeded-round-robin-start-bc8edd84
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DWx57QYGSOPVwMRlS_1Ph

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-round-robin-start-bc8edd84 -d '<json body>'
```

Example prompt: Using seed 'user-abc123' and 7 team members, compute the starting index for a seeded round-robin distribution so I know which member goes first.

## When to prefer this

Choose this endpoint when you need a deterministic, reproducible starting index for round-robin task or resource distribution — especially when auditability and verifiable no-retention processing matter. It is ideal for AI agent orchestration scenarios where you need consistent, seed-driven assignment without storing inputs. Prefer it over custom hashing logic when you need cryptographic evidence (SHA-256 of input) confirming the computation was clean.

## Known failure modes

- Missing required fields (seed or member_count) result in a validation error
- member_count of zero or negative may cause a divide-by-zero or invalid range error
- Seed strings exceeding 8192 characters will be rejected
- Payment failure via x402 results in a 402 response before computation occurs
- Malformed JSON body returns a 400 bad request

## 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 `start_index` (the deterministically computed starting position within the round-robin) and `member_count` (echoed back), along with a verifiable evidence block including an input SHA-256 hash, confirmation that no data was retained, and a count of zero external calls made during processing.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "seed": {
   "type": "string",
   "maxLength": 8192,
   "description": "Seed supplied to Seeded Round Robin Start; used only for this bounded calculation and processed in memory without retention."
  },
  "member_count": {
   "type": "integer",
   "description": "Member Count supplied to Seeded Round Robin Start; used only for this bounded calculation and processed in memory without retention."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {
   "start_index": 4,
   "member_count": 7
  },
  "schema": "delx/util-seeded-round-robin-start/v1",
  "status": "pass",
  "evidence": {
   "retained": false,
   "input_sha256": "40cb4e4bb3e1dab089d71313a59ec0aa2f02317e2e48c56a5e4981cc84c221f5",
   "external_calls": 0
  },
  "operation": "seeded_decision:seeded_round_robin_start"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-commerce-seeded-round-robin-start-bc8edd84/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)