BinancePortfolioMarginRenewListenKey

THE RISK

Low Risk

Why BinancePortfolioMarginRenewListenKey needs a policy

This tool extends a WebSocket listen key's validity period — it's a keep-alive/heartbeat operation that doesn't read data, write/modify financial data, execute code, or move money. It simply refreshes an authentication token's expiry, which is closest to 'Other'. No financial transaction or destructive action is involved.

From the tool's definition Extend the validity of a Portfolio Margin listen key by 60 minutes.

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

POLICY

How to control BinancePortfolioMarginRenewListenKey

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 BinancePortfolioMarginRenewListenKey:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "BinancePortfolioMarginRenewListenKey": {
      "limits": [
        {
          "counter": "binanceportfoliomarginrenewlistenkey_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

BinancePortfolioMarginRenewListenKey gets a rate cap, and everything else on the server is denied unless you say otherwise.

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.

SET A RULE FOR THIS TOOL →

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EXPLORE

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FAQ

Questions about BinancePortfolioMarginRenewListenKey

What does the BinancePortfolioMarginRenewListenKey tool do? +

Extend the validity of a Portfolio Margin listen key by 60 minutes. It is categorised as a Other tool in the Sperax Ecosystem Crypto & DeFI MCP Server MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on BinancePortfolioMarginRenewListenKey? +

Register the Sperax Ecosystem Crypto & DeFI MCP Server MCP server in PolicyLayer and add a rule for BinancePortfolioMarginRenewListenKey: 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 BinancePortfolioMarginRenewListenKey? +

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

Can I rate-limit BinancePortfolioMarginRenewListenKey? +

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

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

BinancePortfolioMarginRenewListenKey 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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