Retrieve comprehensive stock market data for individual ticker symbols from Yahoo Finance. Returns current price, intraday high/low, 52-week range, trading volume, market capitalization, P/E ratio, earnings per share, dividend yield, and sector classification. Use for fundamental analysis, stock ...
Part of the Finance Mcp Server server.
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AI agents call get_stock_data to retrieve information from Finance Mcp Server without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though get_stock_data only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"get_stock_data": {}
}
}See the full Finance Mcp Server policy for all 5 tools.
These attack patterns abuse exactly the kind of access get_stock_data gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Retrieve comprehensive stock market data for individual ticker symbols from Yahoo Finance. Returns current price, intraday high/low, 52-week range, trading volume, market capitalization, P/E ratio, earnings per share, dividend yield, and sector classification. Use for fundamental analysis, stock screening, or building financial dashboards.. It is categorised as a Read tool in the Finance Mcp Server MCP Server, which means it retrieves data without modifying state.
Register the Finance Mcp Server MCP server in PolicyLayer and add a rule for get_stock_data: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Finance Mcp Server. Nothing to install.
get_stock_data is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_stock_data rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for get_stock_data. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
get_stock_data is provided by the Finance Mcp Server MCP server (https://nexgendata-mcp-proxy.steve-corbeil.workers.dev/finance-mcp-server/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 5 Finance Mcp Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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