// MCP TOOL REFERENCE

wsCancelOrder

ServerBybit MCP Server
CategoryDestructive

WHAT IT DOES

What wsCancelOrder does on Bybit MCP Server

AI agents call wsCancelOrder to permanently remove resources in Bybit MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.

THE RISK

Critical Risk

Why wsCancelOrder needs a policy

Cancelling an order is an irreversible action — once cancelled, the order cannot be reinstated. The tool acts on live trading infrastructure with real financial assets, making misuse high severity. While it doesn't directly move money, cancellation of orders is a one-way destructive operation on existing trading state, placing it above Execute/Write in severity.

From the tool's definition Cancel an existing unfilled or partially filled order via WebSocket on Bybit V5 unified account

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

POLICY

How to control wsCancelOrder

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

policy.json

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

wsCancelOrder 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 Bybit 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 →

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EXPLORE

Related tools and policies

More Bybit MCP Server tools

Financial removeLiquidity Withdraw funds from a Liquidity Mining pool position.\n\n- Financial confirmQuote Confirm the quote and execute the conversion trade.\n\nImportant:\n- Must confirm within t Financial executePurchase Place a buy order to purchase on-chain tokens with payment tokens.\nReturns an Financial executeQuote Execute (accept) a quote to initiate the multi-leg trade.\nThis endpoint is asynchronous - Financial executeRedeem Place a sell order to redeem on-chain tokens for payment tokens.\nReturns an Financial quickRepayment Execute quick repayment for specified coin Financial accountBorrow Manual borrow for Unified account.\n\nRules:\n- Borrowing via OpenAPI endpoint supports va Financial accountRepay Manually repay the liabilities of Unified account.\n\nRules:\n- If neither

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Go deeper

Critical-risk tools in Bybit 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 wsCancelOrder

What does the wsCancelOrder tool do? +

Cancel an existing unfilled or partially filled order via WebSocket on Bybit V5 unified account.\n\nIMPORTANT: This tool places/modifies real orders via WebSocket. Confirm symbol, side, quantity, and price with the user before calling. Response is an acknowledgment only; use subscribeOrder or REST endpoints to verify actual order status. It is categorised as a Destructive tool in the Bybit 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 wsCancelOrder? +

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

What risk level is wsCancelOrder? +

wsCancelOrder 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 wsCancelOrder? +

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

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

wsCancelOrder is provided by the Bybit MCP Server MCP server (bybit-exchange/trading-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Bybit MCP Server tool call.

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

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326 Bybit MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.