# Jev Structured Decision Engine (SystemOne)

> Jev Structured Decision Engine (SystemOne) is a paid API for AI agents from sol.mapleai.shop, paid per call via x402, $0.001604/call, status unknown (last checked 2026-10-02).

Analyzes a described state and returns structured answers to named questions using typed decision categories (yes/no/null, choice, or score)

## Facts

- Endpoint: POST https://sol.mapleai.shop/jev?utm_source=zero.xyz
- Price: $0.001604/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/jev-structured-decision-engine-systemone-14d465b8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Po0oQc6jOgsJ08PMUINhh

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 jev-structured-decision-engine-systemone-14d465b8 -d '<json body>'
```

Example prompt: Using the Jev SystemOne engine, analyze this situation — 'The customer was charged twice for one order.' — and answer these questions: is this a billing issue (noul type), and how urgent is it on a scale of 1–10 (score type).

## When to prefer this

Choose this endpoint when you need structured, typed answers from an unstructured text description — especially when you need a mix of binary (yes/no/null), categorical (choice), and numeric (score) outputs in a single call. It is purpose-built for decision automation workflows like triage, classification, and qualification rather than open-ended text generation. Prefer it over general chat completions when you need machine-readable structured outputs without post-processing.

## Known failure modes

- Invalid question type enum (must be noul, choice, or score) causes validation error
- Missing required 'state' or 'questions' fields returns 400 bad request
- Empty questions object may return empty results without error
- Ambiguous or very short state descriptions may yield low-confidence or null answers
- Payment failure (insufficient USDC) blocks the call with 402 response
- Malformed question instructions may produce unexpected classification behavior

## How this service works

Jev structured decisions via SystemOne, priced by input tokens

## Output

Returns structured answers keyed to each named question: noul questions return yes/no/null, choice questions return a selected label from the defined options, and score questions return a numeric value. All keyed by the question names provided in the request.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "model": {
   "enum": [
    "jev-latest"
   ],
   "type": "string",
   "example": "jev-latest"
  },
  "state": {
   "type": "string",
   "example": "The customer was charged twice for one order."
  },
  "questions": {
   "type": "object",
   "example": {
    "billing": {
     "type": "noul",
     "instructions": "Is this about a billing issue?"
    }
   },
   "description": "Named questions. Each value needs type (noul, choice or score) and instructions.",
   "additionalProperties": {
    "type": "object",
    "required": [
     "type",
     "instructions"
    ],
    "properties": {
     "type": {
      "enum": [
       "noul",
       "choice",
       "score"
      ],
      "type": "string"
     },
     "instructions": {
      "type": "string"
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/jev-structured-decision-engine-systemone-14d465b8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from sol.mapleai.shop](https://www.zero.xyz/host/sol.mapleai.shop/llms.txt)