Access full price and volume data for any stock symbol using the FMP Comprehensive Stock Price and Volume Data API. Get detailed insights, including open, high, low, close prices, trading volume, price changes, percentage changes, and volume-weighted average price (VWAP).
Part of the Financial Modeling Prep (FMP) Server server.
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AI agents call getFullChart to retrieve information from Financial Modeling Prep (FMP) 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 getFullChart 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": {
"getFullChart": {}
}
}See the full Financial Modeling Prep (FMP) Server policy for all 253 tools.
These attack patterns abuse exactly the kind of access getFullChart 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.
Access full price and volume data for any stock symbol using the FMP Comprehensive Stock Price and Volume Data API. Get detailed insights, including open, high, low, close prices, trading volume, price changes, percentage changes, and volume-weighted average price (VWAP).. It is categorised as a Read tool in the Financial Modeling Prep (FMP) Server MCP Server, which means it retrieves data without modifying state.
Register the Financial Modeling Prep (FMP) Server MCP server in PolicyLayer and add a rule for getFullChart: 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.
getFullChart 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 getFullChart 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 getFullChart. 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.
getFullChart 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.
Deterministic rules across all 253 Financial Modeling Prep (FMP) Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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