# Joe Market Data – Stablecoin Watch

> Joe Market Data – Stablecoin Watch is a paid API for AI agents from joe-market-data.marnick-yezo.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Returns real-time stablecoin prices, peg deviations (in basis points), and depeg alerts for the top 30 USD-pegged stablecoins via DefiLlama.

## Facts

- Endpoint: GET https://joe-market-data.marnick-yezo.workers.dev/stablecoin-watch
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/joe-market-data-stablecoin-watch-b79f44a8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Sr_EjsSWZkfkrCEuN51-f

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 joe-market-data-stablecoin-watch-b79f44a8
```

Example prompt: Pull the latest stablecoin watch data — I want to see which of the top 30 USD stablecoins are deviating from their peg and whether any depeg alerts have been triggered.

## When to prefer this

Choose this endpoint when you need a lightweight, pay-per-call stablecoin health check using DefiLlama data, especially in agentic pipelines that want depeg alerts without setting up a full data subscription. Ideal for DeFi bots, risk monitors, or portfolio agents that need a quick peg status snapshot for the top 30 USD stablecoins at minimal cost ($0.001 USDC).

## Known failure modes

- DefiLlama upstream outage causes empty or stale data response
- Rate limiting or payment failure on Base returns 402 error
- Malformed response if DefiLlama schema changes upstream
- Network timeout from Cloudflare Workers edge node

## How this service works

Public-data market intel for AI agents: token prices (CoinGecko), DefiLlama TVL/fees/stables, Polymarket odds. Otto-compatible path names. $0.001 USDC per call on Base. No LLM/TTS/image.

## Output

Returns a JSON object with a 'data' field containing: a list of the top 30 USD stablecoins with their symbol, current price, and peg deviation in basis points; plus a 'depeg_alerts' array flagging any coins significantly off their peg. Also includes meta information noting the DefiLlama source, endpoint path, and cost of $0.001 USDC per call.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "depeg_alerts": [],
   "top_30_usd_stables": [
    {
     "price": 1,
     "symbol": "USDT",
     "peg_deviation_bps": 1.2
    }
   ]
  },
  "meta": {
   "source": "defillama",
   "endpoint": "/stablecoin-watch",
   "cost_usdc": "0.001"
  },
  "status": "success"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/joe-market-data-stablecoin-watch-b79f44a8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from joe-market-data.marnick-yezo.workers.dev](https://www.zero.xyz/host/joe-market-data.marnick-yezo.workers.dev/llms.txt)