Create a new USD-M Futures user data stream listen key. The listen key is valid for 60 minutes and can be used to receive account updates via WebSocket. Must be kept alive with keepAlive endpoint.
AI agents invoke BinanceFuturesCreateListenKey to trigger actions in Sperax Ecosystem Crypto & DeFI MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.
This tool initiates a live data stream session on Binance USD-M Futures. While it doesn't directly move funds, it creates an authenticated session key that enables real-time account data access on a futures trading platform. The creation of a listen key is an external operation with side effects (session establishment) that could facilitate further financial operations.
From the tool's definition Create a new USD-M Futures user data stream listen key...can be used to receive account updates via WebSocket
Documented attack patterns abuse exactly the kind of access BinanceFuturesCreateListenKey gives an agent:
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 BinanceFuturesCreateListenKey:
{
"version": "1",
"default": "deny",
"tools": {
"BinanceFuturesCreateListenKey": {
"limits": [
{
"counter": "binancefuturescreatelistenkey_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}BinanceFuturesCreateListenKey stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
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Create a new USD-M Futures user data stream listen key. The listen key is valid for 60 minutes and can be used to receive account updates via WebSocket. Must be kept alive with keepAlive endpoint. It is categorised as a Execute tool in the Sperax Ecosystem Crypto & DeFI MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Sperax Ecosystem Crypto & DeFI MCP Server MCP server in PolicyLayer and add a rule for BinanceFuturesCreateListenKey: 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.
BinanceFuturesCreateListenKey is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the BinanceFuturesCreateListenKey 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.
Set action: deny in the PolicyLayer policy for BinanceFuturesCreateListenKey. 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.
BinanceFuturesCreateListenKey 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.
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.
Free to start. No card required.
1318 Sperax Ecosystem Crypto & DeFI MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.