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onori

yfinance-mcp-server

by onori
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yfinance-mcp-server

日本語版

Important Note: This is an unofficial MCP server.

A Message Control Protocol (MCP) server for accessing Yahoo Finance data. This server provides a simple interface to retrieve stock market data through yfinance.

Features

  • Get historical stock data with customizable periods and intervals

  • Easy to use with any MCP client

  • Built with TypeScript for type safety and better developer experience

Related MCP server: YFinance MCP Server

Usage

Example Cursor MCP Client.

{
  "mcpServers": {
    "yfinance": {
      "command": "npx",
      "args": [
        "@onori/yfinance-mcp-server"
      ]
    }
  }
}

getStockHistory

Retrieves historical stock data for a given symbol.

Parameters:

  • symbol (required): The stock symbol (e.g., "AAPL" for Apple Inc.)

  • period (required): Time period to fetch data for (e.g., "1d", "5d", "1mo", "3mo", "6mo", "1y", "2y", "5y", "10y", "ytd", "max")

  • interval (optional): Data interval ("1d", "1wk", "1mo")

Example MCP request:

> (Request) 
Please use the `getStockHistory` tool to fetch the daily stock data for AAPL for the past week (`period`='1w', `interval`='1d'). Then, render the results as a markdown table.

> (Response Example)
I'll help you fetch Apple's stock data and format it nicely as a markdown table.
First, I'll call the getStockHistory tool to fetch the data:

Let me format this data into a more readable markdown table:

| Date | Open | High | Low | Close | Volume |
|------|------|------|-----|-------|---------|
| Mar 31, 2025 | $217.01 | $225.62 | $216.23 | $222.13 | 65.30M |
| Apr 1, 2025 | $219.81 | $223.68 | $218.90 | $223.19 | 36.41M |
| Apr 2, 2025 | $221.32 | $225.19 | $221.02 | $223.89 | 35.91M |
| Apr 3, 2025 | $205.54 | $207.49 | $201.25 | $203.19 | 103.42M |
| Apr 4, 2025 | $193.89 | $199.88 | $187.34 | $188.38 | 125.57M |

Some notable observations from this data:
- The stock showed significant volatility over this period
- There was a sharp decline in the last two trading days
- Trading volume increased substantially during the declining days, with the highest volume (125.57M shares) on April 4th
- The stock price range was from a high of $225.62 to a low of $187.34 during this period
Would you like any specific analysis of this data or would you like to see different metrics?

Development

To set up the development environment:

  1. Clone the repository

  2. Install dependencies:

npm install

  1. Start the development server:

npm run dev

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

License

ISC License (ISC)

Available Tools

1 tool
getStockHistoryD
ParametersJSON Schema
NameRequiredDescriptionDefault
symbolYes
periodYes
intervalNo

TDQS

D1/5.0
Behavior1/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Tool has no description.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness1/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Tool has no description.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness1/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Tool has no description.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters1/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Tool has no description.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose1/5

Does the description clearly state what the tool does and how it differs from similar tools?

Tool has no description.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines1/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Tool has no description.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections. Dates show when Glama detected each change.

  1. 1 tool updatev0.0.3
    • First observedgetStockHistory
Install Server
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TDQS

D1.7/5.0
Disambiguation5/5

Only one tool exists, so there is no risk of confusion between tools.

Naming Consistency5/5

A single tool trivially follows its own naming pattern (camelCase verb_noun).

Tool Count2/5

A single tool for a finance data server is far too few; expected at least 3-15 tools for basic coverage.

Completeness1/5

The tool surface is severely incomplete for stock market data, lacking any other essential operations (e.g., current price, dividends, financials).

Maintenance

ActivityInactive
ResponsivenessNo issues

Resources

Unclaimed servers have limited discoverability.

Looking for Admin?

If you are the server author, to access and configure the admin panel.

Related MCP Connectors

Related MCP Servers

  • YFinance MCP Server

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  • YFinance MCP Server

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  • Yahoo Finance MCP Server

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  • Yahoo Finance MCP Server

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