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's growth or decline.
This record as markdown: /tools/imbenrabi-financial-modeling-prep-mcp-server/gethistoricalmarketcap.md
What getHistoricalMarketCap does on Financial Modeling Prep (FMP) Server
AI agents call getHistoricalMarketCap to retrieve information from Financial Modeling Prep (FMP) Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
to | string | — | End date (YYYY-MM-DD) |
from | string | — | Start date (YYYY-MM-DD) |
limit | number | — | Limit on number of results (default: 100, max: 5000) |
symbol | string | — | Stock symbol |
Parameters from the server's own tool schema.
Why getHistoricalMarketCap is rated Low
This tool queries and returns historical financial data without creating, modifying, or deleting information. It has no side effects on data or financial positions. The severity is low because accessing read-only market data poses minimal risk even if misused by an agent—no irreversible changes, money movement, or code execution can result.
From the tool's definition Tool retrieves historical market capitalization data; no modification, deletion, or financial transaction occurs. Description states it 'helps track the changes in market value over time' - purely informational access.
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 (FMP) 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 (FMP) 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's growth or decline. It is categorised as a Read tool in the Financial Modeling Prep (FMP) Server MCP Server, which means it retrieves data without modifying state.
getHistoricalMarketCap accepts 4 parameters: to, from, limit, symbol. The full parameter table on this page comes from the server's own tool schema.
Register the Financial Modeling Prep (FMP) 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 (FMP) 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 (FMP) Server MCP server (imbenrabi/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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