# x402stock Short Interest History

> x402stock Short Interest History is a paid API for AI agents from agents.x402stock.xyz, paid per call via MPP, $0.02/call, status unknown (last checked 2026-10-12).

Returns bi-weekly FINRA exchange-reported short interest history for a US-listed stock, including shares sold short, average daily volume, and days-to-cover.

## Facts

- Endpoint: GET https://agents.x402stock.xyz/api/v1/short-interest/{ticker}?utm_source=zero.xyz
- Price: $0.02/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Provider: agents.x402stock.xyz
- Website: https://agents.x402stock.xyz
- Canonical page: https://www.zero.xyz/c/agents-x402stock-xyz-x402stock-short-interest-history-b6e9090b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uIRNngUqiGcB0hv8-_EEx

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 agents-x402stock-xyz-x402stock-short-interest-history-b6e9090b
```

Example prompt: Pull the last 8 FINRA settlement periods of short interest history for GME — I want to see shares sold short, average daily volume, and days-to-cover to assess short squeeze potential.

## When to prefer this

Use this endpoint when you need exchange-reported FINRA short interest data with bi-weekly settlement granularity for any US-listed stock, specifically when days-to-cover or trend analysis of short positioning is required. It is the right choice over generic market data endpoints because it provides the authoritative semi-monthly FINRA figures rather than estimated or inferred short interest, and supports configurable history depth via the limit parameter.

## Known failure modes

- Invalid or unlisted ticker symbol returns an error or empty data
- Limit parameter outside 1–100 range is rejected
- Ticker with no FINRA short interest data returns null for latest and empty history array
- Payment failure via x402/USDC blocks the request
- Rate limiting or proxy errors return 402 or 5xx responses

## How this service works

Returns bi-weekly short interest and days-to-cover for a stock.

## Output

A JSON object containing the ticker, a data block with count of settlements returned, the latest settlement record (settlement date, shares short, avg daily volume, days-to-cover), and a history array of those same fields ordered most-recent-first, plus a source label and as-of timestamp.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "ticker"
 ],
 "properties": {
  "limit": {
   "type": "integer",
   "default": 12,
   "maximum": 100,
   "exclusiveMinimum": 0
  },
  "ticker": {
   "type": "string",
   "description": "US-listed ticker symbol (uppercase), e.g. AAPL."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "ticker",
  "data",
  "source",
  "as_of"
 ],
 "properties": {
  "data": {
   "type": "object",
   "required": [
    "count",
    "latest",
    "history"
   ],
   "properties": {
    "count": {
     "type": "number"
    },
    "latest": {
     "type": "object",
     "anyOf": [
      {
       "type": "object",
       "required": [
        "settlement_date",
        "short_interest",
        "avg_daily_volume",
        "days_to_cover"
       ],
       "properties": {
        "days_to_cover": {
         "type": "number"
        },
        "short_interest": {
         "type": "number"
        },
        "settlement_date": {
         "type": "string"
        },
        "avg_daily_volume": {
         "type": "number"
        }
       },
       "additionalProperties": false
      },
      {
       "type": "null"
      }
     ],
     "properties": {
      "days_to_cover": {
       "type": "number"
      },
      "short_interest": {
       "type": "number"
      },
      "settlement_date": {
       "type": "string"
      },
      "avg_daily_volume": {
       "type": "number"
      }
     }
    },
    "history": {
     "type": "array",
     "items": {
      "type": "object",
      "required": [
       "settlement_date",
       "short_interest",
       "avg_daily_volume",
       "days_to_cover"
      ],
      "properties": {
       "days_to_cover": {
        "type": "number"
       },
       "short_interest": {
        "type": "number"
       },
       "settlement_date": {
        "type": "string"
       },
       "avg_daily_volume": {
        "type": "number"
       }
      },
      "additionalProperties": false
     }
    }
   },
   "additionalProperties": false
  },
  "as_of": {
   "type": "string"
  },
  "source": {
   "type": "string",
   "const": "x402stock"
  },
  "ticker": {
   "type": "string"
  },
  "feedback": {
   "type": "object",
   "required": [
    "endpoint",
    "method",
    "free",
    "note"
   ],
   "properties": {
    "free": {
     "type": "boolean"
    },
    "note": {
     "type": "string"
    },
    "method": {
     "type": "string",
     "const": "POST"
    },
    "endpoint": {
     "type": "string"
    }
   },
   "additionalProperties": false
  }
 },
 "additionalProperties": false
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agents-x402stock-xyz-x402stock-short-interest-history-b6e9090b/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)