get_stock_price_by_date

Retrieve historical stock prices for specific dates using Yahoo Finance data. Enter a stock symbol and date to get the closing price for that trading day.

Instructions

Get the stock price for a given stock symbol on a specific date.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`symbol`	Yes	Stock symbol in Yahoo Finance format.
`date`	Yes	The date in YYYY-MM-DD format.

Implementation Reference

src/mcp_yahoo_finance/server.py:72-81 (handler)

The handler function in the YahooFinance class that implements the tool logic: creates a yfinance Ticker, fetches 1-day history starting from the given date, and returns the closing price formatted to 4 decimal places.

def get_stock_price_by_date(self, symbol: str, date: str) -> str:
    """Get the stock price for a given stock symbol on a specific date.

    Args:
        symbol (str): Stock symbol in Yahoo Finance format.
        date (str): The date in YYYY-MM-DD format.
    """
    stock = Ticker(ticker=symbol, session=self.session)
    price = stock.history(start=date, period="1d")
    return f"{price.iloc[0]['Close']:.4f}"

src/mcp_yahoo_finance/server.py:211-211 (registration)
Registers the get_stock_price_by_date tool in the MCP server's list_tools() by passing the handler method to generate_tool.
```
generate_tool(yf.get_stock_price_by_date),
```
src/mcp_yahoo_finance/server.py:226-228 (registration)
In the server's call_tool() dispatcher, matches the tool name and invokes the handler with arguments, returning the result as TextContent.
```
case "get_stock_price_by_date":
    price = yf.get_stock_price_by_date(**args)
    return [TextContent(type="text", text=price)]
```

src/mcp_yahoo_finance/utils.py:31-65 (helper)

Helper function that generates the MCP Tool object (including schema inferred from function signature, docstring, and type annotations) used to register all tools including get_stock_price_by_date.

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