// MCP TOOL REFERENCE

Low Risk

binance_us_create_listen_key

ServerBinance US MCP Server
CategoryRead

How to control binance_us_create_listen_key ↓

WHAT IT DOES

What binance_us_create_listen_key does on Binance US MCP Server

AI agents call binance_us_create_listen_key to retrieve information from Binance US MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

THE RISK

Low Risk

Why binance_us_create_listen_key needs a policy

This tool creates a listen key that grants read-only access to real-time account update streams (balance updates, order updates). It does not modify account data, execute trades, or move funds. The 'create' here is creating an authentication token for a read stream, not creating a financial resource. The blast radius is low — misuse could expose account activity data but cannot cause financial harm directly.

From the tool's definition Create a new listen key for User Data Stream WebSocket connection. The listen key is used to subscribe to real-time account updates via WebSocket.

Risk signalsBulk/mass operation — affects multiple targets

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

POLICY

How to control binance_us_create_listen_key

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "binance_us_create_listen_key": {}
  }
}

binance_us_create_listen_key is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Binance US 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.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Binance US MCP Server tools

Financial binance_us_cancel_replace Cancel an existing order and place a new order on the same symbol atomically. This is usef Financial binance_us_cust_new_order Place a new trade order through the custodial solution. ⚠️ REQUIRES CUSTODIAL SOLUTION AP Financial binance_us_new_oco Place a new OCO (One-Cancels-the-Other) order on Binance.US. OCO orders combine a limit or Financial binance_us_new_order Place a new trade order on Binance.US. Supports LIMIT, MARKET, STOP_LOSS, STOP_LOSS_LIMIT, Financial binance_us_cl_transfer Transfer assets in or out of your credit line account. ⚠️ REQUIRES CREDIT LINE API KEY - Financial binance_us_cust_transfer Transfer assets from custodial partner account to Binance.US custodial sub-account. ⚠️ RE Financial binance_us_cust_undo_transfer Undo a previous transfer from your custodial partner. ⚠️ REQUIRES CUSTODIAL SOLUTION API Financial binance_us_cust_wallet_transfer Transfer assets from Binance.US exchange wallet to custodial sub-account. ⚠️ REQUIRES CUS

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about binance_us_create_listen_key

What does the binance_us_create_listen_key tool do? +

Create a new listen key for User Data Stream WebSocket connection. The listen key is used to subscribe to real-time account updates via WebSocket. Connect to: ${BINANCE_US_CONFIG.WS_URL}/ws/<listenKey> ⚠️ IMPORTANT: - Listen keys are valid for 60 minutes - Use binance_us_keepalive_listen_key every 30 minutes to extend validity - A stream will close when the listen key expires - You can only have ONE active listen key per account The stream sends updates for: - outboundAccountPosition: Account balance updates - balanceUpdate: Deposit/withdrawal updates - executionReport: Order/trade updates This endpoint requires API key but does NOT require signature. It is categorised as a Read tool in the Binance US MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on binance_us_create_listen_key? +

Register the Binance US MCP Server MCP server in PolicyLayer and add a rule for binance_us_create_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 Binance US MCP Server. Nothing to install.

What risk level is binance_us_create_listen_key? +

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

Can I rate-limit binance_us_create_listen_key? +

Yes. Add a rate_limit block to the binance_us_create_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_create_listen_key completely? +

Set action: deny in the PolicyLayer policy for binance_us_create_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_create_listen_key? +

binance_us_create_listen_key is provided by the Binance US MCP Server MCP server (nirholas/binance-us-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.