This API call returns meta and cross rate time series for the requested instruments. 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. Works with stocks, forex and cryptocurrency.
AI agents call GetTimeSeriesCross 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.
GetTimeSeriesCross is a query/fetch operation that retrieves historical and current financial market data without side effects. No data is created, modified, deleted, or financial transactions are executed. Even though it accesses financial market data, the tool itself performs no financial operations—it only provides informational market data.
From the tool's definition Tool retrieves time series data and meta information (Open, High, Low, Close prices) for financial instruments.
Documented attack patterns abuse exactly the kind of access GetTimeSeriesCross 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 GetTimeSeriesCross:
{
"version": "1",
"default": "deny",
"tools": {
"GetTimeSeriesCross": {}
}
}GetTimeSeriesCross 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 cross rate time series for the requested instruments. 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. Works with stocks, forex and cryptocurrency. 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 GetTimeSeriesCross: 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.
GetTimeSeriesCross 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 GetTimeSeriesCross 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 GetTimeSeriesCross. 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.
GetTimeSeriesCross 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.