# x402_balance

Check your AgentCash USDC wallet balance on Base. Returns current balance available for x402 payments and approximate number of calls you can afford. No parameters required. If AgentCash is not set up, provides instructions to create and fund a wallet.

Agent View of the PolicyLayer registry record for `x402_balance`. HTML page: https://policylayer.com/tools/8randonpickart5-x402-buyer-mcp/x402-balance

## Facts

- Tool: `x402_balance`
- Server: X402 Buyer (`8randonpickart5/x402-buyer-mcp`) — https://policylayer.com/tools/8randonpickart5-x402-buyer-mcp.md
- Homepage: https://github.com/8randonpickart5/x402-buyer-mcp
- Risk category: Read (Low risk)
- Registry record: grade D, 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": "x402_balance",
    "arguments": {}
  }
}
```

## Why x402_balance is rated Low

This tool only reads and returns the current wallet balance. It performs no writes, executions, or financial transactions — it is a pure read/query operation with no side effects.

From the tool's own definition: "Check your AgentCash USDC wallet balance on Base... Returns current balance available for x402 payments... No parameters required."

## Use case

AI agents call x402_balance to retrieve information from X402 Buyer 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 X402 Buyer:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "x402_balance": {}
  }
}
```

## Other tools on X402 Buyer (3)

- `x402_research` — Execute — https://policylayer.com/tools/8randonpickart5-x402-buyer-mcp/x402-research.md
- `x402_call` — Financial — https://policylayer.com/tools/8randonpickart5-x402-buyer-mcp/x402-call.md
- `x402_discover` — Read — https://policylayer.com/tools/8randonpickart5-x402-buyer-mcp/x402-discover.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`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=8randonpickart5-x402-buyer-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/8randonpickart5-x402-buyer-mcp