Return historical OHLCV bars for a contract.
AI agents call ibkr_get_historical_bars to retrieve information from Ibkr without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves market data snapshots and historical pricing information. It has no side effects, does not modify account state, execute trades, or affect financial positions. It is a straightforward Read operation with minimal security risk—an AI agent cannot cause harm by calling this tool as it only accesses historical market data that is already public or available within the user's account.
From the tool's definition Tool returns historical OHLCV (open, high, low, close, volume) bars for a contract—a pure data retrieval operation with no modification, deletion, or execution of trades. The description explicitly states 'Return' indicating a query/fetch operation.
Documented attack patterns abuse exactly the kind of access ibkr_get_historical_bars gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Ibkr, and nothing reaches the server without passing your rules. This is the rule we recommend for ibkr_get_historical_bars:
{
"version": "1",
"default": "deny",
"tools": {
"ibkr_get_historical_bars": {}
}
}ibkr_get_historical_bars is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Return historical OHLCV bars for a contract. It is categorised as a Read tool in the Ibkr MCP Server, which means it retrieves data without modifying state.
Register the Ibkr MCP server in PolicyLayer and add a rule for ibkr_get_historical_bars: 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 Ibkr. Nothing to install.
ibkr_get_historical_bars 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 ibkr_get_historical_bars 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 ibkr_get_historical_bars. 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.
ibkr_get_historical_bars is provided by the Ibkr MCP server (patrickpxp/ibkr-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Ibkr, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
33 Ibkr tools catalogued and risk-classified — across an index of 43,000+ MCP servers.