Access essential financial metrics for a company with the FMP Financial Key Metrics API. Evaluate revenue, net income, P/E ratio, and more to assess performance and compare it to competitors.
Part of the Financial Modeling Prep (FMP) Server server.
Free to start. No card required.
AI agents call getKeyMetrics 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 getKeyMetrics 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": {
"getKeyMetrics": {}
}
}See the full Financial Modeling Prep (FMP) Server policy for all 253 tools.
These attack patterns abuse exactly the kind of access getKeyMetrics 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 essential financial metrics for a company with the FMP Financial Key Metrics API. Evaluate revenue, net income, P/E ratio, and more to assess performance and compare it to competitors.. 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 getKeyMetrics: 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.
getKeyMetrics 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 getKeyMetrics 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 getKeyMetrics. 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.
getKeyMetrics 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.
Free to start. No card required.
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