BinancePortfolioMarginDeleteListenKey

THE RISK

Critical Risk

Why BinancePortfolioMarginDeleteListenKey needs a policy

The tool explicitly deletes a listen key and terminates a user data stream connection. This is an irreversible deletion action — once the listen key is closed, the stream connection is terminated and cannot be undone without creating a new key. While it doesn't directly move money, it disrupts real-time data streams which could affect trading operations in a DeFi/financial context.

From the tool's definition Close/delete a Portfolio Margin listen key. This will terminate the user data stream connection.

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

POLICY

How to control BinancePortfolioMarginDeleteListenKey

PolicyLayer is an MCP gateway — it sits between your AI agents and Sperax Ecosystem Crypto & DeFI MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for BinancePortfolioMarginDeleteListenKey:

policy.json

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

BinancePortfolioMarginDeleteListenKey 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 Sperax Ecosystem Crypto & DeFI 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.

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EXPLORE

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Go deeper

Critical-risk tools in Sperax Ecosystem Crypto & DeFI 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.
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Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
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FAQ

Questions about BinancePortfolioMarginDeleteListenKey

What does the BinancePortfolioMarginDeleteListenKey tool do? +

Close/delete a Portfolio Margin listen key. This will terminate the user data stream connection. It is categorised as a Destructive tool in the Sperax Ecosystem Crypto & DeFI 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 BinancePortfolioMarginDeleteListenKey? +

Register the Sperax Ecosystem Crypto & DeFI MCP Server MCP server in PolicyLayer and add a rule for BinancePortfolioMarginDeleteListenKey: 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 Sperax Ecosystem Crypto & DeFI MCP Server. Nothing to install.

What risk level is BinancePortfolioMarginDeleteListenKey? +

BinancePortfolioMarginDeleteListenKey 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 BinancePortfolioMarginDeleteListenKey? +

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

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

BinancePortfolioMarginDeleteListenKey is provided by the Sperax Ecosystem Crypto & DeFI MCP Server MCP server (sperax/sperax-crypto-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Sperax Ecosystem Crypto & DeFI MCP Server tool call.

Start from Sperax Ecosystem Crypto & DeFI 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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