ccxt_fetch_order_book

Call exchange.fetchOrderBook(symbol, limit, params).

SERVERCodex CCXT MCP SOURCEoci:ghcr.io/lucyfox199818-collab/ccxt-mcp:0.1.0

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-lucyfox199818-collab-ccxt-mcp/ccxt-fetch-order-book.md

WHAT IT DOES

What ccxt_fetch_order_book does on Codex CCXT MCP

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.

RISK

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 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.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs ccxt_fetch_order_book safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Codex CCXT MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For ccxt_fetch_order_book, this is the rule to start with:

ccxt_fetch_order_book Allowed

ccxt_fetch_order_book is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "ccxt_fetch_order_book": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Codex CCXT MCP, apply this rule, and every ccxt_fetch_order_book call is checked against it from then on.

FAQ

Questions about ccxt_fetch_order_book

What does the ccxt_fetch_order_book tool do? +

Call exchange.fetchOrderBook(symbol, limit, params). It is categorised as a Read tool in the Codex CCXT MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on ccxt_fetch_order_book? +

Register the Codex CCXT MCP server in PolicyLayer and add a rule for ccxt_fetch_order_book: 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 Codex CCXT MCP. Nothing to install.

What risk level is ccxt_fetch_order_book? +

ccxt_fetch_order_book is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit ccxt_fetch_order_book? +

Yes. Add a rate_limit block to the ccxt_fetch_order_book 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.

How do I block ccxt_fetch_order_book completely? +

Set action: deny in the PolicyLayer policy for ccxt_fetch_order_book. 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.

What MCP server provides ccxt_fetch_order_book? +

ccxt_fetch_order_book is provided by the Codex CCXT MCP server (oci:ghcr.io/lucyfox199818-collab/ccxt-mcp:0.1.0). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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