binance_us_custodial_balance
Get balance information for Binance.US exchange wallet and custodial sub-account. ⚠️ REQUIRES CUSTODIAL SOLUTION API KEY - Regular API keys will not work. Returns two balance arrays: - exchangeWalletBalance: Balances in your Binance.US exchange wallet - custodialAcctBalance: Balances in your Bina...
This record as markdown: /tools/nirholas-binance-mcp/binance-us-custodial-balance.md
What binance_us_custodial_balance does on Binance MCP Server
AI agents call binance_us_custodial_balance to retrieve information from Binance MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why binance_us_custodial_balance is rated Low
This tool retrieves balance information only — it reads financial account data but does not move funds, place orders, or modify any state. Severity is medium because it exposes sensitive financial account details including asset holdings across exchange and custodial wallets, which could be valuable for reconnaissance or privacy violations.
From the tool's definition Get balance information for Binance.US exchange wallet and custodial sub-account
Attacks that exploit this kind of access
The rule that runs binance_us_custodial_balance safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Binance MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For binance_us_custodial_balance, this is the rule to start with:
binance_us_custodial_balance is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Binance MCP Server, apply this rule, and every binance_us_custodial_balance call is checked against it from then on.
Questions about binance_us_custodial_balance
Get balance information for Binance.US exchange wallet and custodial sub-account. ⚠️ REQUIRES CUSTODIAL SOLUTION API KEY - Regular API keys will not work. Returns two balance arrays: - exchangeWalletBalance: Balances in your Binance.US exchange wallet - custodialAcctBalance: Balances in your Binance.US custodial sub-account Each balance includes: - asset: Asset symbol (e.g., BTC, ETH) - free: Available balance - locked: Locked balance (in orders, etc.) - inSettlement: Amount in settlement process (custodial only) - lastUpdatedTime: Last update timestamp. It is categorised as a Read tool in the Binance MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Binance MCP Server MCP server in PolicyLayer and add a rule for binance_us_custodial_balance: 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 MCP Server. Nothing to install.
binance_us_custodial_balance is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the binance_us_custodial_balance 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 binance_us_custodial_balance. 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.
binance_us_custodial_balance is provided by the Binance MCP Server MCP server (nirholas/binance-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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