Fetch K-Bar data for a stock within a date range
AI agents call get_kbars to retrieve information from Shioaji without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves historical K-bar (candlestick) price data for a stock within a specified date range. It is a read-only operation that queries existing market data without side effects, modifications, or financial transactions. Despite the server providing access to a financial trading API, this specific tool only fetches and returns data without executing trades, moving money, or modifying any state.
From the tool's definition Tool name is 'get_kbars' and description states 'Fetch K-Bar data for a stock within a date range' — pure data retrieval with no modification or execution capability.
Documented attack patterns abuse exactly the kind of access get_kbars gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Shioaji, and nothing reaches the server without passing your rules. This is the rule we recommend for get_kbars:
{
"version": "1",
"default": "deny",
"tools": {
"get_kbars": {}
}
}get_kbars is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Fetch K-Bar data for a stock within a date range. It is categorised as a Read tool in the Shioaji MCP Server, which means it retrieves data without modifying state.
Register the Shioaji MCP server in PolicyLayer and add a rule for get_kbars: 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 Shioaji. Nothing to install.
get_kbars 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 get_kbars 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 get_kbars. 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.
get_kbars is provided by the Shioaji MCP server (sinotrade/mcp-server-shioaji). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Shioaji, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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3 Shioaji tools catalogued and risk-classified — across an index of 43,000+ MCP servers.