binance_us_keepalive_listen_key

THE RISK

Low Risk

Why binance_us_keepalive_listen_key needs a policy

This tool merely refreshes/extends a session token (listen key) for a WebSocket stream. It does not read data, write data, execute code, delete anything, or move money. It is a keepalive/heartbeat operation with no direct data or financial side effects, placing it in the 'Other' category. Misuse has minimal blast radius—at worst a stream session stays alive or expires.

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

Risk signalsBulk/mass operation — affects multiple targets

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

POLICY

How to control binance_us_keepalive_listen_key

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 binance_us_keepalive_listen_key:

policy.json

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

binance_us_keepalive_listen_key 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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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
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FAQ

Questions about binance_us_keepalive_listen_key

What does the binance_us_keepalive_listen_key tool do? +

Extend the validity of a listen key by 60 minutes. ⚠️ IMPORTANT: - Call this every 30 minutes to prevent the stream from closing - If the key expires, you. 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 binance_us_keepalive_listen_key? +

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

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

Can I rate-limit binance_us_keepalive_listen_key? +

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

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

binance_us_keepalive_listen_key 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.

CHECK YOUR STACK →