BinanceSubAccountUniversalTransfer

THE RISK

Critical Risk

Why BinanceSubAccountUniversalTransfer needs a policy

This tool directly moves cryptocurrency or funds between accounts. The capability to transfer assets between master and sub-accounts across different account types (spot, margin, futures) constitutes a financial operation that commits monetary obligations and changes asset positions.

From the tool's definition Universal transfer between master account and sub-accounts—this moves funds across account types on Binance, a major cryptocurrency exchange.

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

POLICY

How to control BinanceSubAccountUniversalTransfer

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 BinanceSubAccountUniversalTransfer:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "BinanceSubAccountUniversalTransfer": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

Any call to BinanceSubAccountUniversalTransfer is blocked until a human approves it. 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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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.
Human-in-the-loop → When a tool call should wait for a person — and when policy can decide alone.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
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FAQ

Questions about BinanceSubAccountUniversalTransfer

What does the BinanceSubAccountUniversalTransfer tool do? +

Universal transfer between master account and sub-accounts, supporting various account types (spot, margin, futures, etc.). It is categorised as a Financial tool in the Sperax Ecosystem Crypto & DeFI MCP Server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on BinanceSubAccountUniversalTransfer? +

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

BinanceSubAccountUniversalTransfer is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit BinanceSubAccountUniversalTransfer? +

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

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

BinanceSubAccountUniversalTransfer 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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