Track the stocks with the largest price increases using the Top Stock Gainers API. Identify the companies that are leading the market with significant price surges, offering potential growth opportunities.
AI agents call getBiggestGainers to retrieve information from Financial Modeling Prep MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
getBiggestGainers queries and returns market analysis data (top performing stocks) without creating, modifying, deleting, executing code, or moving money. This is a straightforward read operation that provides market information for analysis purposes. Even though the server is financial in nature, this specific tool only retrieves and presents data.
From the tool's definition Tool retrieves stock market data showing "stocks with the largest price increases" and identifies "companies that are leading the market" - pure data retrieval with no modification, execution, or financial transactions.
Attacks that exploit this kind of access
Track the stocks with the largest price increases using the Top Stock Gainers API. Identify the companies that are leading the market with significant price surges, offering potential growth opportunities. It is categorised as a Read tool in the Financial Modeling Prep MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Financial Modeling Prep MCP Server MCP server in PolicyLayer and add a rule for getBiggestGainers: 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 Financial Modeling Prep MCP Server. Nothing to install.
getBiggestGainers 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 getBiggestGainers 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 getBiggestGainers. 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.
getBiggestGainers is provided by the Financial Modeling Prep MCP Server MCP server (vijitdaroch/financial-modeling-prep-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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