# FINRA Daily Short-Sale Volume by Ticker

> FINRA Daily Short-Sale Volume by Ticker is a paid API for AI agents from marketdata.use.x402atlas.com, paid per call via x402, $0.015/call, status unknown (last checked 2026-09-15).

Returns FINRA daily short-sale volume data for a US stock, including short volume, total volume, and short-volume ratio as an intraday sentiment signal.

## Facts

- Endpoint: GET https://marketdata.use.x402atlas.com/short-volume
- Price: $0.015/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/finra-daily-short-sale-volume-by-ticker-052b74d3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hWJRu58qUgrPL2Xul9PHX

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 finra-daily-short-sale-volume-by-ticker-052b74d3
```

Example prompt: What's the FINRA daily short-sale volume and short-volume ratio for NVDA over the last 20 trading days? I want to see if short-selling pressure has been building up.

## When to prefer this

Use this endpoint when you need FINRA-sourced daily short-sale volume and short-volume ratio for a US equity, particularly to assess intraday short-selling sentiment or monitor whether short pressure is increasing. Prefer this over FINRA short interest endpoints when you want daily granularity and volume-ratio signals rather than bi-monthly short interest snapshots.

## Known failure modes

- Missing required 'ticker' query parameter returns a 400 error
- Invalid or non-US ticker symbol returns empty results or an error
- Limit exceeds maximum of 50000, resulting in a capped or error response
- Payment not included or insufficient USDC causes a 402 Payment Required response
- Data may not be available for the current trading day if FINRA has not yet published it

## How this service works

FINRA daily short-sale volume for a US stock — short volume, total volume and short-volume ratio, an intraday sentiment signal.

## Output

Returns a list of daily records for the requested ticker, each containing the date, short volume, total volume, and short-volume ratio — useful for gauging intraday short-selling sentiment trends over time.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "ticker"
     ],
     "properties": {
      "limit": {
       "type": "integer",
       "maximum": 50000,
       "minimum": 1,
       "description": "Max results returned"
      },
      "ticker": {
       "type": "string",
       "description": "US stock ticker, e.g. AAPL"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "queried_at",
      "ticker",
      "count",
      "records"
     ],
     "properties": {
      "count": {
       "type": "integer",
       "description": "Number of records returned."
      },
      "ticker": {
       "type": "string",
       "description": "Echo of the requested ticker."
      },
      "records": {
       "type": "array",
       "items": {
        "type": "object",
        "required": [
         "short_volume",
         "total_volume"
        ],
        "properties": {
         "date": {
          "type": "string",
          "format": "date"
         },
         "short_volume": {
          "type": "number"
         },
         "total_volume": {
          "type": "number"
         },
         "short_volume_ratio": {
          "type": "number",
          "description": "Percent of total volume sold short."
         }
        }
       },
       "description": "FINRA daily short-sale volume history, most recent first."
      },
      "queried_at": {
       "type": "string",
       "format": "date-time",
       "description": "UTC timestamp when this bridge queried the upstream."
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 1,
  "ticker": "A",
  "records": [
   {
    "date": "2025-03-25",
    "short_volume": 181219,
    "total_volume": 574084,
    "short_volume_ratio": 31.57
   }
  ],
  "queried_at": "2026-07-06T12:00:00Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/finra-daily-short-sale-volume-by-ticker-052b74d3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from marketdata.use.x402atlas.com](https://www.zero.xyz/host/marketdata.use.x402atlas.com/llms.txt)