# get_crypto_bars A read tool on the Alpaca MCP Server MCP server. Agent View of the PolicyLayer registry record for `get_crypto_bars`. HTML page: https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/get-crypto-bars ## Facts - Tool: `get_crypto_bars` - Server: Alpaca MCP Server (`cliffsgpt/alpaca-mcp-clone`) — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone.md - Homepage: https://github.com/CliffsGPT/Alpaca-MCP-Clone - Risk category: Read (Low risk) - Registry record: grade F, identity unverified - Server rate-limited: no - Parameters: 0 - Recommended policy verdict: Allowed ## Example call (MCP tools/call, JSON-RPC 2.0) ```json { "jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": { "name": "get_crypto_bars", "arguments": {} } } ``` ## Why get_crypto_bars is rated Low This tool queries historical market data without modifying any state or executing trades. Even though it's on a financial platform (Alpaca), merely reading cryptocurrency price information carries minimal risk—it does not move money, execute transactions, or alter accounts. The low severity reflects that misuse would only provide the AI with market data, not enable harmful financial operations. From the tool's own definition: "Tool name 'get_crypto_bars' indicates retrieval of historical cryptocurrency price data (bars = OHLCV candlestick data). The 'get_' prefix and absence of any modification verbs confirm read-only data retrieval." ## Use case AI agents call get_crypto_bars to retrieve information from Alpaca MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere. ## Recommended policy (PolicyLayer) Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Alpaca MCP Server: ```json { "version": "1", "default": "deny", "tools": { "get_crypto_bars": {} } } ``` ## Other tools on Alpaca MCP Server (30) - `cancel_all_orders` — Destructive — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/cancel-all-orders.md - `cancel_order_by_id` — Destructive — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/cancel-order-by-id.md - `close_all_positions` — Destructive — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/close-all-positions.md - `exercise_options_position` — Financial — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/exercise-options-position.md - `place_crypto_order` — Financial — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/place-crypto-order.md - `place_option_market_order` — Financial — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/place-option-market-order.md - `place_stock_order` — Financial — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/place-stock-order.md - `get_account_info` — Read — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/get-account-info.md - `get_all_assets` — Read — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/get-all-assets.md - `get_asset_info` — Read — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/get-asset-info.md - `get_corporate_announcements` — Read — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/get-corporate-announcements.md - `get_crypto_quotes` — Read — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/get-crypto-quotes.md - `get_market_calendar` — Read — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/get-market-calendar.md - `get_market_clock` — Read — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/get-market-clock.md - `get_open_position` — Read — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/get-open-position.md - `get_option_contracts` — Read — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/get-option-contracts.md - `get_option_latest_quote` — Read — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/get-option-latest-quote.md - `get_option_snapshot` — Read — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/get-option-snapshot.md - `get_orders` — Read — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/get-orders.md - `get_positions` — Read — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/get-positions.md - `get_stock_bars` — Read — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/get-stock-bars.md - `get_stock_latest_bar` — Read — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/get-stock-latest-bar.md - `get_stock_latest_trade` — Read — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/get-stock-latest-trade.md - `get_stock_quote` — Read — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/get-stock-quote.md - `get_stock_snapshot` — Read — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/get-stock-snapshot.md - `get_stock_trades` — Read — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/get-stock-trades.md - `get_watchlists` — Read — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/get-watchlists.md - `close_position` — Write — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/close-position.md - `create_watchlist` — Write — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/create-watchlist.md - `update_watchlist` — Write — https://policylayer.com/tools/cliffsgpt-alpaca-mcp-clone/update-watchlist.md ## For agents This record is a snapshot. Live verdicts and the full registry: - Check every server in your MCP config at once: `npx -y policylayer stack` - Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md) - Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events` --- Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=cliffsgpt-alpaca-mcp-clone · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/cliffsgpt-alpaca-mcp-clone