yahoo_finance_ticker_history
Yahoo Finance historical prices. Returns normalized OHLCV points for a symbol. Use either period or start/end.
This record as markdown: /tools/crawlora-mcp/yahoo-finance-ticker-history.md
What yahoo_finance_ticker_history does on Crawlora
AI agents call yahoo_finance_ticker_history to retrieve information from Crawlora without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
end | string | — | Unix seconds, RFC3339, or YYYY-MM-DD |
start | string | — | Unix seconds, RFC3339, or YYYY-MM-DD |
keepna | boolean | — | Keep fully empty chart rows |
period | string | — | Range such as 1d, 1mo, 1y, max |
symbol | string | Yes | Yahoo Finance symbol such as AAPL |
interval | string | — | Interval such as 1d, 1h, 5m |
rounding | boolean | — | Round prices to two decimals |
auto_adjust | boolean | — | Adjust OHLC prices with adjusted close |
back_adjust | boolean | — | Back-adjust OHLC prices while keeping close |
include_actions | boolean | — | Include dividends, splits, and capital gains |
include_prepost | boolean | — | Include pre/post market data |
Parameters from the server's own tool schema.
Why yahoo_finance_ticker_history is rated Low
This tool retrieves historical price data (Open, High, Low, Close, Volume) from Yahoo Finance. It is a read-only data fetch operation with no side effects, no execution, and no financial transactions involved.
From the tool's definition Yahoo Finance historical prices. Returns normalized OHLCV points for a symbol.
Risk signalsHigh parameter count (11 properties)
Attacks that exploit this kind of access
The rule that runs yahoo_finance_ticker_history safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Crawlora, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For yahoo_finance_ticker_history, this is the rule to start with:
yahoo_finance_ticker_history is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Crawlora, apply this rule, and every yahoo_finance_ticker_history call is checked against it from then on.
Questions about yahoo_finance_ticker_history
Yahoo Finance historical prices. Returns normalized OHLCV points for a symbol. Use either period or start/end. It is categorised as a Read tool in the Crawlora MCP Server, which means it retrieves data without modifying state.
yahoo_finance_ticker_history accepts 11 parameters: end, start, keepna, period, symbol, interval, rounding, auto_adjust, back_adjust, include_actions, include_prepost. Required: symbol. The full parameter table on this page comes from the server's own tool schema.
Register the Crawlora MCP server in PolicyLayer and add a rule for yahoo_finance_ticker_history: 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 Crawlora. Nothing to install.
yahoo_finance_ticker_history 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 yahoo_finance_ticker_history 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 yahoo_finance_ticker_history. 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.
yahoo_finance_ticker_history is provided by the Crawlora MCP server (crawlora-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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