getBiggestLosers
Access data on the stocks with the largest price drops using the Biggest Stock Losers API. Identify companies experiencing significant declines and track the stocks that are falling the fastest in the market.
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What getBiggestLosers does on Financial Modeling Prep
AI agents call getBiggestLosers to retrieve information from Financial Modeling Prep without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why getBiggestLosers is rated Low
This tool retrieves and queries market data about stock price movements. It has no side effects, cannot execute trades, move money, or modify any data. The worst-case misuse would be informing a decision, but the tool itself performs only read operations on publicly available market information.
From the tool's definition Tool name 'getBiggestLosers' and description state it 'Access data on the stocks with the largest price drops' and 'Identify companies experiencing significant declines' — purely data retrieval with no modification, execution, or financial transaction…
Attacks that exploit this kind of access
The rule that runs getBiggestLosers safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Financial Modeling Prep, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For getBiggestLosers, this is the rule to start with:
getBiggestLosers is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Financial Modeling Prep, apply this rule, and every getBiggestLosers call is checked against it from then on.
Questions about getBiggestLosers
Access data on the stocks with the largest price drops using the Biggest Stock Losers API. Identify companies experiencing significant declines and track the stocks that are falling the fastest in the market. It is categorised as a Read tool in the Financial Modeling Prep MCP Server, which means it retrieves data without modifying state.
Register the Financial Modeling Prep MCP server in PolicyLayer and add a rule for getBiggestLosers: 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. Nothing to install.
getBiggestLosers 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 getBiggestLosers 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 getBiggestLosers. 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.
getBiggestLosers is provided by the Financial Modeling Prep MCP server (cfocoder/financial-modeling-prep-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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