BinanceCrossMarginTransfer

THE RISK

Critical Risk

Why BinanceCrossMarginTransfer needs a policy

This tool directly moves money or financial assets between account types (spot and cross margin), which constitutes a financial transaction. On a DeFi/crypto platform, cross-margin transfers can leverage positions and affect financial obligations. An AI agent misusing this could transfer funds incorrectly, trigger margin calls, or cause unintended financial losses.

From the tool's definition Tool name is "BinanceCrossMarginTransfer" and description states "Execute a cross margin account transfer.

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

POLICY

How to control BinanceCrossMarginTransfer

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 BinanceCrossMarginTransfer:

policy.json

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

Any call to BinanceCrossMarginTransfer 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 BinanceCrossMarginTransfer

What does the BinanceCrossMarginTransfer tool do? +

Execute a cross margin account transfer. Transfer between spot and cross margin accounts. 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 BinanceCrossMarginTransfer? +

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

BinanceCrossMarginTransfer 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 BinanceCrossMarginTransfer? +

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

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

BinanceCrossMarginTransfer 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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