getHistoricalMarketCap
Access historical market capitalization data for a company using the FMP Historical Market Capitalization API. This API helps track the changes in market value over time, enabling long-term assessments of a company
This record as markdown: /tools/io-github-imbenrabi-financial-modeling-prep-mcp-server/gethistoricalmarketcap.md
What getHistoricalMarketCap does on Financial Modeling Prep MCP Server
AI agents call getHistoricalMarketCap to retrieve information from Financial Modeling Prep MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why getHistoricalMarketCap is rated Low
This tool retrieves historical financial data (market capitalization) without side effects. It enables read-only queries of public market data for analysis purposes. There is no risk of data modification, deletion, code execution, or financial transactions. Low severity because misuse would only affect the user's own analysis/understanding, not system integrity or financial obligations.
From the tool's definition Tool description states 'Access historical market capitalization data' and 'track the changes in market value over time' — purely retrieval and query operations with no modification, deletion, or execution capabilities.
Attacks that exploit this kind of access
The rule that runs getHistoricalMarketCap safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Financial Modeling Prep MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For getHistoricalMarketCap, this is the rule to start with:
getHistoricalMarketCap 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 MCP Server, apply this rule, and every getHistoricalMarketCap call is checked against it from then on.
Questions about getHistoricalMarketCap
Access historical market capitalization data for a company using the FMP Historical Market Capitalization API. This API helps track the changes in market value over time, enabling long-term assessments of a company. 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 getHistoricalMarketCap: 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.
getHistoricalMarketCap 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 getHistoricalMarketCap 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 getHistoricalMarketCap. 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.
getHistoricalMarketCap is provided by the Financial Modeling Prep MCP Server MCP server (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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