This API call returns meta and time series for the requested instrument. Metaobject consists of general information about the requested symbol. Time series is the array of objects ordered by time descending with Open, High, Low, Close prices. Non-currency instruments also include volume information.
AI agents call GetTimeSeries to retrieve information from Twelve Data MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
GetTimeSeries is a data retrieval function that queries historical time series data and metadata from financial markets. It has no side effects, does not modify any state, does not execute code or commands, and does not involve financial transactions. The tool simply fetches and returns existing market data.
From the tool's definition Tool returns 'meta and time series for the requested instrument' with 'Open, High, Low, Close prices' and 'volume information' — purely retrieves and queries historical financial market data with no modification, deletion, or execution capabilities.
Documented attack patterns abuse exactly the kind of access GetTimeSeries gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Twelve Data MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for GetTimeSeries:
{
"version": "1",
"default": "deny",
"tools": {
"GetTimeSeries": {}
}
}GetTimeSeries is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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This API call returns meta and time series for the requested instrument. Metaobject consists of general information about the requested symbol. Time series is the array of objects ordered by time descending with Open, High, Low, Close prices. Non-currency instruments also include volume information. It is categorised as a Read tool in the Twelve Data MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Twelve Data MCP Server MCP server in PolicyLayer and add a rule for GetTimeSeries: 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 Twelve Data MCP Server. Nothing to install.
GetTimeSeries 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 GetTimeSeries 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 GetTimeSeries. 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.
GetTimeSeries is provided by the Twelve Data MCP Server MCP server (twelvedata/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 186 Twelve Data MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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186 Twelve Data MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.