cancelOrder

THE RISK

Critical Risk

Why cancelOrder needs a policy

Cancelling an order is an irreversible action that permanently removes a pending trade from the exchange. While it doesn't move money directly, it destroys an existing financial commitment/order that cannot be restored once cancelled. This is the most severe applicable category given the irreversible nature of the action in a financial trading context.

From the tool's definition Cancel an existing order

Documented attack patterns abuse exactly the kind of access cancelOrder gives an agent:

POLICY

How to control cancelOrder

PolicyLayer is an MCP gateway — it sits between your AI agents and CCXT MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for cancelOrder:

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "cancelOrder"
  ]
}

cancelOrder disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

Create a free account and register CCXT MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More CCXT MCP Server tools

Financial createOrder Create a new order using a configured account Read analyzeConsecutiveProfitLoss Analyze consecutive winning and losing trades Read analyzePeriodicReturns Analyze daily and monthly returns for a configured account Read analyzeTradingPerformance Analyze trading performance for a configured account Read calculateWinRate Calculate win rate and profit metrics for a configured account Read fetchBalance Fetch account balance for a configured account Read fetchClosedOrders Fetch all closed orders using a configured account Read fetchDeposits Fetch deposit history for a configured account

All 20 CCXT MCP Server tools →

Destructive tools on other servers

Android Forensics ADB MCP Server create_full_backup 0xarchive web3_revoke_key Frida Game Hacking MCP clear_scan cPanel MCP Server clear_spam_box

Go deeper

Critical-risk tools in CCXT MCP Server → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about cancelOrder

What does the cancelOrder tool do? +

Cancel an existing order using a configured account. It is categorised as a Destructive tool in the CCXT MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on cancelOrder? +

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

What risk level is cancelOrder? +

cancelOrder is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit cancelOrder? +

Yes. Add a rate_limit block to the cancelOrder 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 cancelOrder completely? +

Set action: deny in the PolicyLayer policy for cancelOrder. 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 cancelOrder? +

cancelOrder is provided by the CCXT MCP Server MCP server (lazy-dinosaur/ccxt-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every CCXT MCP Server tool call.

Start from CCXT MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →