# ccxt_fetch_order_book Call exchange.fetchOrderBook(symbol, limit, params). Agent View of the PolicyLayer registry record for `ccxt_fetch_order_book`. HTML page: https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-fetch-order-book ## Facts - Tool: `ccxt_fetch_order_book` - Server: Codex CCXT MCP (`oci:ghcr.io/lucyfox199818-collab/ccxt-mcp:0.1.0`) — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp.md - Homepage: https://github.com/lucyfox199818-collab/codex-binance-agent - 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": "ccxt_fetch_order_book", "arguments": {} } } ``` ## Why ccxt_fetch_order_book is rated Low This tool retrieves market data (the order book for a given symbol) from a cryptocurrency exchange. It is a read-only query operation with no side effects, no data modification, no code execution beyond the data fetch itself, and no financial transactions. The parameters (symbol, limit, params) control what data is retrieved but do not alter exchange state or commit financial actions. From the tool's own definition: "Tool name 'ccxt_fetch_order_book' and description 'Call exchange.fetchOrderBook(symbol, limit, params)' — fetches and retrieves order book data from an exchange without modifying state." ## Use case AI agents call ccxt_fetch_order_book to retrieve information from Codex CCXT MCP 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 Codex CCXT MCP: ```json { "version": "1", "default": "deny", "tools": { "ccxt_fetch_order_book": {} } } ``` ## Other tools on Codex CCXT MCP (112) - `ccxt_cancel_algo_order` — Destructive — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-cancel-algo-order.md - `ccxt_cancel_all_algo_orders` — Destructive — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-cancel-all-algo-orders.md - `ccxt_cancel_all_orders` — Destructive — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-cancel-all-orders.md - `ccxt_cancel_all_orders_after` — Destructive — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-cancel-all-orders-after.md - `ccxt_call` — Execute — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-call.md - `ccxt_cancel_order` — Execute — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-cancel-order.md - `ccxt_cancel_orders` — Execute — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-cancel-orders.md - `ccxt_cancel_orders_for_symbols` — Execute — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-cancel-orders-for-symbols.md - `ccxt_set_margin_mode` — Execute — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-set-margin-mode.md - `ccxt_set_position_mode` — Execute — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-set-position-mode.md - `ccxt_add_margin` — Financial — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-add-margin.md - `ccxt_create_order` — Financial — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-create-order.md - `ccxt_create_order_with_take_profit_and_stop_loss` — Financial — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-create-order-with-take-profit-and-stop-loss.md - `ccxt_create_orders` — Financial — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-create-orders.md - `ccxt_create_post_only_order` — Financial — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-create-post-only-order.md - `ccxt_create_protected_futures_entry` — Financial — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-create-protected-futures-entry.md - `ccxt_create_reduce_only_order` — Financial — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-create-reduce-only-order.md - `ccxt_create_stop_limit_order` — Financial — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-create-stop-limit-order.md - `ccxt_create_stop_loss_order` — Financial — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-create-stop-loss-order.md - `ccxt_create_stop_market_order` — Financial — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-create-stop-market-order.md - `ccxt_create_stop_order` — Financial — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-create-stop-order.md - `ccxt_create_take_profit_order` — Financial — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-create-take-profit-order.md - `ccxt_create_trailing_amount_order` — Financial — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-create-trailing-amount-order.md - `ccxt_create_trailing_percent_order` — Financial — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-create-trailing-percent-order.md - `ccxt_create_trigger_order` — Financial — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-create-trigger-order.md - `ccxt_reduce_margin` — Financial — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-reduce-margin.md - `ccxt_transfer` — Financial — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-transfer.md - `ccxt_withdraw` — Financial — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-withdraw.md - `audit_analyze_cycles` — Read — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/audit-analyze-cycles.md - `audit_analyze_trading_decisions` — Read — https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp/audit-analyze-trading-decisions.md - …and 82 more: https://policylayer.com/tools/io-github-lucyfox199818-collab-ccxt-mcp.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=io-github-lucyfox199818-collab-ccxt-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-lucyfox199818-collab-ccxt-mcp