# Sovereign Engine LLM Cached

> Sovereign Engine LLM Cached is a paid API for AI agents from api.zuluworksai.com, paid per call via x402, $0.0005/call, status down (last checked 2026-09-15).

Executes a cached LLM inference call via x402 pay-per-call, paid in USDC on Base, with results returned as structured JSON

## Facts

- Endpoint: POST https://api.zuluworksai.com/cf/llm-cached
- Price: $0.0005/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-llm-cached-0090ffd7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BzBgWXPAFhJA6bCSjCTeD

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-llm-cached-0090ffd7 -d '<json body>'
```

Example prompt: Send this prompt to the Sovereign Engine LLM cached endpoint and pay the $0.0005 USDC x402 fee: 'Summarize the key differences between proof-of-work and proof-of-stake blockchains in three bullet points.'

## When to prefer this

Choose this endpoint when you need pay-per-call LLM inference billed in USDC on Base via the x402 protocol, with no subscription required and response caching for cost efficiency. Ideal for agents that need occasional AI text generation without committing to a subscription-based LLM API.

## Known failure modes

- Insufficient USDC balance or failed x402 payment — returns 402 Payment Required
- Empty or missing prompt field — returns validation error
- LLM inference timeout in Cloudflare Worker sandbox
- Cached response unavailable, triggering fresh inference with possible higher latency
- Network error reaching the self-hosted facilitator — returns 5xx

## 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 'data' field containing the LLM's response, a 'success' boolean, and a 'receipt_id' UUID confirming the paid call was processed.

## 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-llm-cached-0090ffd7/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)