# x402stock Market Losers

> x402stock Market Losers is a paid API for AI agents from agents.x402stock.xyz, paid per call via x402 or MPP, $0.02/call, status unknown (last checked 2026-10-15).

Returns the biggest declining stocks (market losers) for the current or most recent trading session, priced per call in USDC via x402

## Facts

- Endpoint: GET https://agents.x402stock.xyz/api/v1/losers?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402, MPP
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402stock-market-losers-3e6e9bb8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7Cwe3_880ukMD_1VZ0qDj

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 x402stock-market-losers-3e6e9bb8
```

Example prompt: What are the biggest stock market losers right now — which US equities have dropped the most today?

## When to prefer this

Use this endpoint when you need a real-time or session-based ranked list of the worst-performing US stocks without managing API keys or accounts. It is ideal for agents that need autonomous market screener data with pay-per-use economics via x402/USDC, especially when building daily market summaries, contrarian screens, or risk monitoring workflows.

## Known failure modes

- Market closed or no trading data available for the session
- Payment failure if USDC balance is insufficient via x402
- Invalid or malformed properties filter returns 400 error
- Rate limiting if too many requests are made in quick succession
- Empty result set if market has not yet opened or no data is available

## How this service works

The day's biggest percentage losers across US equities, with current and previous-day OHLCV per ticker. From x402stock, a pay-per-call market & economic data API for AI agents. No API key or account; pay in USDC via x402.

## Output

A ranked list of the worst-performing US stocks for the current or most recent trading session, including ticker symbols, price change values, percentage declines, and volume data for each loser.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "source",
  "as_of",
  "direction",
  "count",
  "tickers"
 ],
 "properties": {
  "as_of": {
   "type": "string"
  },
  "count": {
   "type": "number"
  },
  "source": {
   "type": "string",
   "const": "x402stock"
  },
  "tickers": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "ticker",
     "change",
     "change_percent",
     "updated"
    ],
    "properties": {
     "day": {
      "type": "object",
      "required": [
       "open",
       "high",
       "low",
       "close",
       "volume",
       "vwap"
      ],
      "properties": {
       "low": {
        "type": "number"
       },
       "high": {
        "type": "number"
       },
       "open": {
        "type": "number"
       },
       "vwap": {
        "type": "number"
       },
       "close": {
        "type": "number"
       },
       "volume": {
        "type": "number"
       }
      },
      "additionalProperties": false
     },
     "change": {
      "type": "number"
     },
     "ticker": {
      "type": "string"
     },
     "updated": {
      "anyOf": [
       {
        "type": "string"
       },
       {
        "type": "null"
       }
      ]
     },
     "previous_day": {
      "type": "object",
      "required": [
       "open",
       "high",
       "low",
       "close",
       "volume",
       "vwap"
      ],
      "properties": {
       "low": {
        "type": "number"
       },
       "high": {
        "type": "number"
       },
       "open": {
        "type": "number"
       },
       "vwap": {
        "type": "number"
       },
       "close": {
        "type": "number"
       },
       "volume": {
        "type": "number"
       }
      },
      "additionalProperties": false
     },
     "change_percent": {
      "type": "number"
     }
    },
    "additionalProperties": false
   }
  },
  "direction": {
   "enum": [
    "gainers",
    "losers"
   ],
   "type": "string"
  }
 },
 "additionalProperties": false
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402stock-market-losers-3e6e9bb8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agents.x402stock.xyz](https://www.zero.xyz/host/agents.x402stock.xyz/llms.txt)