Retrieve historical data for the S&P 500 index using the Historical S&P 500 API. Analyze past changes in the index, including additions and removals of companies, to understand trends and performance over time.
Part of the Financial Modeling Prep MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents call getHistoricalSP500Changes to retrieve information from Financial Modeling Prep 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 getHistoricalSP500Changes 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.
tools:
getHistoricalSP500Changes:
rules:
- action: allowSee the full Financial Modeling Prep policy for all 253 tools.
Retrieve historical data for the S&P 500 index using the Historical S&P 500 API. Analyze past changes in the index, including additions and removals of companies, to understand trends and performance over time.. It is categorised as a Read tool in the Financial Modeling Prep MCP Server, which means it retrieves data without modifying state.
Add a rule in your Intercept YAML policy under the tools section for getHistoricalSP500Changes. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Financial Modeling Prep MCP server.
getHistoricalSP500Changes 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 getHistoricalSP500Changes rule in your Intercept 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 Intercept policy for getHistoricalSP500Changes. 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.
getHistoricalSP500Changes is provided by the Financial Modeling Prep MCP server (cfocoder/financial-modeling-prep-mcp-server). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Open source. One binary. Zero dependencies.
npx -y @policylayer/intercept