# x402donghang Single Brief — Crypto Trading Brief Generator

> x402donghang Single Brief — Crypto Trading Brief Generator is a paid API for AI agents from x402donghang.duckdns.org, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Generates a structured AI-powered trading brief for a given crypto ticker, including bias, thesis, risks, suggested actions, and confidence score, paid per-call via USDC.

## Facts

- Endpoint: GET https://x402donghang.duckdns.org/x402/v1/single-brief
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402donghang-single-brief-crypto-trading-brief-generator-f374e896
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WorDpuP-7XYsUnQvZh2s4

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 x402donghang-single-brief-crypto-trading-brief-generator-f374e896
```

Example prompt: Give me a quick AI trading brief for BTC in English — focus on spot market, and include any on-chain notes about recent whale accumulation.

## When to prefer this

Choose this endpoint when you need a fast, structured, per-call AI trading brief for a specific crypto token without a subscription, and want to pay per use in USDC. It is ideal for agents that need a concise bias + thesis + actions summary rather than raw price data or charting. Prefer it over generic LLM calls when you want a pre-structured financial brief schema with confidence scoring and invalidation levels baked in.

## Known failure modes

- Missing required 'symbol' field returns validation error
- Payment not attached or insufficient USDC triggers 402 Payment Required
- Invalid locale value outside 'en'/'zh' enum causes schema rejection
- Context field exceeding 6000 characters is rejected
- Symbol not recognized may produce low-confidence or generic output

## How this service works

Fresh crypto narrative research with market context and verifiable source URLs. Free BTC sample; custom radar $0.02/call via x402 USDC.

## Output

A JSON object containing: ok status, market bias string (e.g. '中性偏多'), trading thesis, list of risk factors, suggested actions, bullet-point highlights, product label, timeframe, confidence score (0–1), invalidation condition, and a non-investment-advice disclaimer.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "focus": {
   "type": "string",
   "maxLength": 64,
   "description": "Optional focus: spot | perp | macro | news"
  },
  "locale": {
   "enum": [
    "en",
    "zh"
   ],
   "type": "string",
   "description": "Output language; default zh"
  },
  "symbol": {
   "type": "string",
   "maxLength": 20,
   "minLength": 1,
   "description": "Crypto ticker, e.g. BTC, ETH, SOL"
  },
  "context": {
   "type": "string",
   "maxLength": 6000,
   "description": "Optional market notes or on-chain snapshot"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "bias": "中性偏多",
  "risks": [
   "宏观事件",
   "流动性收缩"
  ],
  "symbol": "BTC",
  "thesis": "短线企稳，等待量能确认。",
  "actions": [
   "观察",
   "回踩分批"
  ],
  "bullets": [
   "现货支撑稳固",
   "杠杆尚未过热"
  ],
  "product": "single-brief",
  "timeframe": "波段",
  "confidence": 0.6,
  "disclaimer": "信息整理，非投资建议",
  "invalidation": "跌破关键支撑"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402donghang-single-brief-crypto-trading-brief-generator-f374e896/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402donghang.duckdns.org](https://www.zero.xyz/host/x402donghang.duckdns.org/llms.txt)