get_stock_price_date_range

Retrieve historical stock prices for a specific symbol within a defined date range using Yahoo Finance data.

Instructions

Get the stock prices for a given date range for a given stock symbol.

Input Schema

TableJSON Schema

Name	Required	Description
`symbol`	Yes	Stock symbol in Yahoo Finance format.
`start_date`	Yes	The start date in YYYY-MM-DD format.
`end_date`	Yes	The end date in YYYY-MM-DD format.

Implementation Reference

src/mcp_yahoo_finance/server.py:83-97 (handler)

Core implementation of the tool: fetches historical closing prices for the given stock symbol over the specified date range using yfinance, formats index as strings, and returns JSON.

def get_stock_price_date_range(
    self, symbol: str, start_date: str, end_date: str
) -> str:
    """Get the stock prices for a given date range for a given stock symbol.

    Args:
        symbol (str): Stock symbol in Yahoo Finance format.
        start_date (str): The start date in YYYY-MM-DD format.
        end_date (str): The end date in YYYY-MM-DD format.
    """
    stock = Ticker(ticker=symbol, session=self.session)
    prices = stock.history(start=start_date, end=end_date)
    prices.index = prices.index.astype(str)
    return f"{prices['Close'].to_json(orient='index')}"

src/mcp_yahoo_finance/server.py:204-218 (registration)

Tool registration in the MCP server's list_tools decorator method, specifically line 212 registers get_stock_price_date_range using generate_tool.

@server.list_tools()
async def list_tools() -> list[Tool]:
    return [            
        generate_tool(yf.cmd_run),
        generate_tool(yf.get_recommendations),
        generate_tool(yf.get_news),
        generate_tool(yf.get_current_stock_price),
        generate_tool(yf.get_stock_price_by_date),
        generate_tool(yf.get_stock_price_date_range),
        generate_tool(yf.get_historical_stock_prices),
        generate_tool(yf.get_dividends),
        generate_tool(yf.get_income_statement),
        generate_tool(yf.get_cashflow),
        generate_tool(yf.get_earning_dates),
    ]

src/mcp_yahoo_finance/server.py:229-231 (handler)
Dispatch logic in the MCP server's call_tool method that calls the tool handler with arguments and returns the result as TextContent.
```
case "get_stock_price_date_range":
    price = yf.get_stock_price_date_range(**args)
    return [TextContent(type="text", text=price)]
```

src/mcp_yahoo_finance/utils.py:31-66 (schema)

Helper function generate_tool that dynamically generates the tool's input schema from the Python function signature, type annotations, and Google-style docstring.

def generate_tool(func: Any) -> Tool:
    """Generates a tool schema from a Python function."""
    signature = inspect.signature(func)
    docstring = inspect.getdoc(func) or ""
    param_descriptions = parse_docstring(docstring)

    schema = {
        "name": func.__name__,
        "description": docstring.split("Args:")[0].strip(),
        "inputSchema": {
            "type": "object",
            "properties": {},
        },
    }

    for param_name, param in signature.parameters.items():
        param_type = (
            "number"
            if param.annotation is float
            else "string"
            if param.annotation is str
            else "string"
        )
        schema["inputSchema"]["properties"][param_name] = {
            "type": param_type,
            "description": param_descriptions.get(param_name, ""),
        }

        if "required" not in schema["inputSchema"]:
            schema["inputSchema"]["required"] = [param_name]
        else:
            if "=" not in str(param):
                schema["inputSchema"]["required"].append(param_name)

    return Tool(**schema)

MCP Yahoo Finance