# 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.

Agent View of the PolicyLayer registry record for `binance_us_cust_available_balance`. HTML page: https://policylayer.com/tools/nirholas-binance-mcp/binance-us-cust-available-balance

## Facts

- Tool: `binance_us_cust_available_balance`
- Server: Binance MCP Server (`nirholas/binance-mcp`) — https://policylayer.com/tools/nirholas-binance-mcp.md
- Homepage: https://github.com/nirholas/Binance-MCP
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "binance_us_cust_available_balance",
    "arguments": {}
  }
}
```

## Why binance_us_cust_available_balance is rated Low

This is a Read operation—it queries and retrieves financial account balance data without creating, modifying, deleting, or executing transactions. The severity is medium rather than low because it exposes sensitive financial account information that could be used to inform unauthorized trading decisions or reconnaissance attacks, though it does not directly move funds or commit financial obligations itself.

From the tool's own definition: "Tool retrieves available balance information from a custodial sub-account; described as 'Get available balance' with no modification or execution capabilities. However, it requires custodial solution API key access to sensitive financial account data."

## Use case

AI agents call binance_us_cust_available_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.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Binance MCP Server:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "binance_us_cust_available_balance": {}
  }
}
```

## Other tools on Binance MCP Server (733)

- `binance_us_cancel_all_open_orders` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binance-us-cancel-all-open-orders.md
- `binance_us_cancel_oco` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binance-us-cancel-oco.md
- `binance_us_cancel_order` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binance-us-cancel-order.md
- `binance_us_cancel_replace` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binance-us-cancel-replace.md
- `binance_us_cust_cancel_oco` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binance-us-cust-cancel-oco.md
- `binance_us_cust_cancel_order` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binance-us-cust-cancel-order.md
- `binance_us_cust_cancel_orders_symbol` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binance-us-cust-cancel-orders-symbol.md
- `BinanceCancelHashRateResaleConfiguration` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binancecancelhashrateresaleconfiguration.md
- `BinanceConvertCancelLimitOrder` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binanceconvertcancellimitorder.md
- `BinanceCrossMarginCancelAllOrders` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binancecrossmargincancelallorders.md
- `BinanceCrossMarginCancelOrder` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binancecrossmargincancelorder.md
- `BinanceDeleteOpenOrders` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binancedeleteopenorders.md
- `BinanceDeleteOrder` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binancedeleteorder.md
- `BinanceDeleteUserDataStream` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binancedeleteuserdatastream.md
- `BinanceDeliveryCancelAllOrders` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binancedeliverycancelallorders.md
- `BinanceDeliveryCancelBatchOrders` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binancedeliverycancelbatchorders.md
- `BinanceDeliveryCancelOrder` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binancedeliverycancelorder.md
- `BinanceDeliveryCountdownCancelAll` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binancedeliverycountdowncancelall.md
- `BinanceDisableIsolatedMarginAccount` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binancedisableisolatedmarginaccount.md
- `BinanceFutureCancelAlgoOrder` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binancefuturecancelalgoorder.md
- `BinanceFuturesCancelAllOpenOrders` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binancefuturescancelallopenorders.md
- `BinanceFuturesCancelAllOrders` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binancefuturescancelallorders.md
- `BinanceFuturesCancelBatchOrders` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binancefuturescancelbatchorders.md
- `BinanceFuturesCancelOrder` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binancefuturescancelorder.md
- `BinanceFuturesCOINMCancelAllOrders` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binancefuturescoinmcancelallorders.md
- `BinanceFuturesCOINMCancelBatchOrders` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binancefuturescoinmcancelbatchorders.md
- `BinanceFuturesCOINMCancelOrder` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binancefuturescoinmcancelorder.md
- `BinanceFuturesUSDMCancelAllOrders` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binancefuturesusdmcancelallorders.md
- `BinanceFuturesUSDMCancelBatchOrders` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binancefuturesusdmcancelbatchorders.md
- `BinanceFuturesUSDMCancelOrder` — Destructive — https://policylayer.com/tools/nirholas-binance-mcp/binancefuturesusdmcancelorder.md
- …and 703 more: https://policylayer.com/tools/nirholas-binance-mcp.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

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Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=nirholas-binance-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/nirholas-binance-mcp