maverick-mcp
Stock market MCP server for Yahoo Finance data, technical analysis, portfolio tracking, and Python backtesting. Runs locally with no API key for core tools.
No outside reports on file
Use this tool only with stock symbols and portfolio data you're comfortable sharing with Claude, keep backtesting code simple and reviewed, and monitor system resources while it runs.
Based on public adoption and transparency signals as of Oct 27, 2026. Our opinion, not a code audit or security guarantee.
What it can access
- Local filesNo local folder access notedLOW
- Command executionNo shell command runner notedLOW
- Network reachConnects to outside service APINOTED
- CredentialsRequires API key or tokenREVIEW
- Package sourceGitHub (wshobson/maverick-mcp)PUBLIC
Inferred from this listing’s public package details and description. Check the project’s source before installing.
Install
No npm or PyPI package is listed. Install from source: github.com/wshobson/maverick-mcp ↗
About Maverick MCP
Maverick-mcp is an MCP server that connects Claude to stock market data from Yahoo Finance. It provides tools for looking up stock prices, running technical analysis, tracking your portfolio, and backtesting trading strategies using Python—all without needing an API key.
Who it’s for
Investors and traders who want Claude to help analyze stocks and test trading ideas locally. It's useful for people who want market data analysis built into Claude conversations.
Alternatives
- Alpha Vantage MCP: Stock data MCP using a different API (requires free API key).
- Yfinance Python library: Direct Python package for Yahoo Finance data without MCP wrapping.
- Manual API integration: Build your own Claude tool to call Yahoo Finance or other market APIs with custom permissions.
Setup
Check these steps against the project’s own instructions before running anything.
Follow the project's README at https://github.com/wshobson/maverick-mcp (opens external site) for installation steps and Claude Desktop configuration instructions.
Why this grade
Signal-based grade (3/7 points): well starred on GitHub, public source code. This reflects adoption and transparency, not a code review.
Popularity and upkeep
- GitHub stars
- 714
- Listing last refreshed
- 2026-10-29
These are public popularity signals, not a maintenance check. Look at the repository’s commit history and open issues.
Security reports
No reports found for this package in our research (last checked 2026-10-29).
Risks to watch for
- Data exposure: The server accesses Yahoo Finance APIs and can see any stock symbols or portfolio data you ask it to look up. Claude will see all this information in conversations.
- Backtesting manipulation: Code written for backtesting could contain hidden logic that inflates returns or hides losses in reports shown to you.
- Web scraping tricks: If the tool scrapes web pages alongside API calls, those pages could contain misleading data or be crafted to trick the analysis.
- Network leaks: Technical analysis or results could be sent to external logging services without clear notice.
- Python execution risks: Running backtests means executing Python code; malformed or malicious strategy code could consume CPU, memory, or attempt file access.
How to lower the risk
Least-privilege permissions
- Run the server in a dedicated user account with no access to sensitive files.
- Restrict Claude's ability to modify files or run arbitrary Python beyond backtesting.
Network isolation
- Run locally only; do not expose the server to the internet or untrusted networks.
- Block outbound connections except to Yahoo Finance if possible.
Monitoring
- Watch for unexpected network requests or high CPU/memory use during backtests.
- Log which stock symbols and portfolio details are queried in each conversation.
Red flags to watch for
- Backtesting results that seem too good to be true without clear explanation.
- Requests to connect to external APIs or services beyond Yahoo Finance.
- Errors or crashes when analyzing certain stocks or large portfolios.
Questions
How do I install Maverick MCP?
Maverick MCP does not publish a standalone npm or PyPI package. Clone or follow the setup instructions in its source repository at github.com/wshobson/maverick-mcp.
Are there security reports about Maverick MCP?
No reports found for this package in our research (last checked 2026-10-29). Maverick MCP currently holds Grade C (Moderate risk signals) based on public adoption and transparency signals. Key risk areas to watch include data exposure, backtesting manipulation, web scraping tricks.
Is Maverick MCP actively maintained?
Maverick MCP has 714 GitHub stars. Our directory data was last refreshed on 2026-10-29. Check recent commit activity, release tags, and open issues at github.com/wshobson/maverick-mcp before pinning it in production.
What are alternatives to Maverick MCP?
Notable alternatives to Maverick MCP include Alpha Vantage MCP (Stock data MCP using a different API (requires free API key)), Yfinance Python library (Direct Python package for Yahoo Finance data without MCP wrapping), Manual API integration (Build your own Claude tool to call Yahoo Finance or other market APIs with custom permissions). You can also compare Maverick MCP side by side with other MCP servers in the Related tools section on this page.
README badge and team notes
Maintain or use Maverick MCP? Show its live grade in your GitHub README, docs site, or run a check from the terminal before you install.
GitHub README Markdown:
[](https://agentarmorhq.com/skills/wshobson-maverick-mcp)HTML embed:
<a href="https://agentarmorhq.com/skills/wshobson-maverick-mcp"><img src="https://agentarmorhq.com/api/badge/wshobson-maverick-mcp" alt="AgentArmorHQ Risk Grade for Maverick MCP" height="20" /></a>Terminal check:
curl -fsSL https://agentarmorhq.com/api/cli | node --input-type=module - check "wshobson-maverick-mcp"Share with your security lead
Need sign-off to use maverick-mcp? Copy this note for Slack, a ticket or a pull request.
### AgentArmorHQ Security Review Memo: maverick-mcp
- **Listing URL:** https://agentarmorhq.com/skills/wshobson-maverick-mcp
- **Type:** App connector
- **Risk Grade:** Grade C (Moderate risk signals)
- **Outside Security Advisories on File:** 0
- **Public Adoption:** 714 GitHub stars
#### Permission & Blast-Radius Signals
- **Local files:** No local folder access noted
- **Command execution:** No shell command runner noted
- **Network reach:** Connects to outside service API
- **Credentials:** Requires API key or token
- **Package source:** GitHub (wshobson/maverick-mcp)
#### Recommended Hardened Setup
- **Source Repo:** https://github.com/wshobson/maverick-mcp
- **Controls:** Pin an exact version in `.mcp.json`, scope access to a single workspace folder, and use a least-privilege read-only token where supported.
_Based on public adoption and transparency signals as of Oct 27, 2026. Our opinion, not a code audit or security guarantee._Key facts
- Type
- App connector
- Publisher
- wshobson
- Source code
- github.com/wshobson/maverick-mcp
- Est. context load
- ~550 tokens / turn (~3 tool schemas, 0.27% of 200k context)
- Popularity
- 714 GitHub stars
- Last updated
- 2026-10-29
- Last graded
- 2026-10-27
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