# Sovereign Engine R2 Store

> Sovereign Engine R2 Store is a paid API for AI agents from api.zuluworksai.com, paid per call via x402, $0.05/call, status down (last checked 2026-09-15).

Stores data or execution results to Cloudflare R2 object storage via a pay-per-call x402 primitive, returning a receipt ID on success.

## Facts

- Endpoint: POST https://api.zuluworksai.com/exec/r2-store
- Price: $0.05/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sovereign-engine-r2-store-26ab7f8b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2-KsKsBdVOtKv-j8ZqFqD

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 sovereign-engine-r2-store-26ab7f8b -d '<json body>'
```

Example prompt: Store this JSON result to R2 object storage using the Sovereign Engine — here's the payload: {"report": "Q2 sales summary", "total": 142000}.

## When to prefer this

Choose this endpoint when you need lightweight, pay-per-call object storage to R2 without managing credentials or infrastructure, especially in agentic workflows already using x402/USDC micropayments on Base. Prefer over S3 or managed storage when cost-per-call billing and Cloudflare edge proximity matter.

## Known failure modes

- Payment failure — insufficient USDC balance or x402 payment not accepted, returns 402
- Storage write failure — R2 backend error, returns error in response body with success:false
- Invalid input — malformed prompt/payload, returns validation error
- Rate limiting or quota exceeded on the self-hosted facilitator
- Network timeout to R2 backend

## How this service works

Pay-per-call x402 execution primitives (USDC on Base). Code execution runs in isolated Cloudflare Dynamic Worker sandboxes (JavaScript + Python, network blocked). Web search backed by Bing RSS. Self-hosted facilitator.

## Output

Returns a JSON object with a success boolean, a uuid receipt_id confirming the write operation, and a data object containing any metadata about the stored resource.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "prompt": {
   "type": "string",
   "description": "The input prompt"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {},
  "success": true,
  "receipt_id": "uuid"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sovereign-engine-r2-store-26ab7f8b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.zuluworksai.com](https://www.zero.xyz/host/api.zuluworksai.com/llms.txt)