binance_us_cust_available_balance
Get available balance in the custodial sub-account for trading. ⚠️ REQUIRES CUSTODIAL SOLUTION API KEY Returns the balance available for placing new orders.
This record as markdown: /tools/nirholas-binance-us-mcp/binance-us-cust-available-balance.md
What binance_us_cust_available_balance does on Binance US MCP Server
AI agents call binance_us_cust_available_balance to retrieve information from Binance US 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_cust_available_balance is rated Low
This tool retrieves account balance information without side effects. However, severity is elevated to 'medium' rather than 'low' because: (1) the custodial sub-account context and API key requirement indicate it accesses sensitive financial account data; (2) balance information could be used to infer account details or inform social engineering; (3) it operates within the Binance.US financial platform where misuse…
From the tool's definition Tool name contains 'get' action pattern (binance_us_cust_available_balance) and description states 'Get available balance' and 'Returns the balance available' — purely retrieval operations with no modification, deletion, or transaction capabilities.
Attacks that exploit this kind of access
The rule that runs binance_us_cust_available_balance safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Binance US 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_cust_available_balance, this is the rule to start with:
binance_us_cust_available_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 US MCP Server, apply this rule, and every binance_us_cust_available_balance call is checked against it from then on.
Questions about binance_us_cust_available_balance
Get available balance in the custodial sub-account for trading. ⚠️ REQUIRES CUSTODIAL SOLUTION API KEY Returns the balance available for placing new orders. It is categorised as a Read tool in the Binance US MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Binance US MCP Server MCP server in PolicyLayer and add a rule for binance_us_cust_available_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 US MCP Server. Nothing to install.
binance_us_cust_available_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_cust_available_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_cust_available_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_cust_available_balance 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.
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