# pay_tab_close

Close a tab and settle funds. Either party can close unilaterally.\n\n

Agent View of the PolicyLayer registry record for `pay_tab_close`. HTML page: https://policylayer.com/tools/io-github-pay-skill-pay-mcp/pay-tab-close

## Facts

- Tool: `pay_tab_close`
- Server: Pay Mcp (`@pay-skill/mcp`) — https://policylayer.com/tools/io-github-pay-skill-pay-mcp.md
- Install: `npx -y @pay-skill/mcp`
- Homepage: https://github.com/pay-skill/pay-mcp
- Risk category: Financial (Critical risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Approval-gated

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

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

## Why pay_tab_close is rated Critical

This tool settles financial obligations by closing a payment tab and transferring funds. Misuse by an AI agent could result in unauthorized transfer of cryptocurrency assets, causing direct financial loss. The ability for either party to unilaterally close and settle funds represents a critical financial risk if the agent is compromised or given misaligned incentives.

From the tool's own definition: "Tool operates on USDC payments and tabs. 'Close a tab and settle funds' indicates transfer of cryptocurrency. Server description explicitly states 'USDC payments for AI agents on Base' confirming financial nature."

## Use case

AI agents use pay_tab_close to commit financial operations through Pay Mcp, usually the final step of a payment, billing, or trading workflow. A call moves real money.

## Recommended policy (PolicyLayer)

Verdict: **Approval-gated**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Pay Mcp:

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

## Other tools on Pay Mcp (14)

- `pay_webhook_delete` — Destructive — https://policylayer.com/tools/io-github-pay-skill-pay-mcp/pay-webhook-delete.md
- `pay_fund` — Financial — https://policylayer.com/tools/io-github-pay-skill-pay-mcp/pay-fund.md
- `pay_mint` — Financial — https://policylayer.com/tools/io-github-pay-skill-pay-mcp/pay-mint.md
- `pay_request` — Financial — https://policylayer.com/tools/io-github-pay-skill-pay-mcp/pay-request.md
- `pay_send` — Financial — https://policylayer.com/tools/io-github-pay-skill-pay-mcp/pay-send.md
- `pay_tab_charge` — Financial — https://policylayer.com/tools/io-github-pay-skill-pay-mcp/pay-tab-charge.md
- `pay_tab_open` — Financial — https://policylayer.com/tools/io-github-pay-skill-pay-mcp/pay-tab-open.md
- `pay_tab_topup` — Financial — https://policylayer.com/tools/io-github-pay-skill-pay-mcp/pay-tab-topup.md
- `pay_withdraw` — Financial — https://policylayer.com/tools/io-github-pay-skill-pay-mcp/pay-withdraw.md
- `pay_discover` — Read — https://policylayer.com/tools/io-github-pay-skill-pay-mcp/pay-discover.md
- `pay_status` — Read — https://policylayer.com/tools/io-github-pay-skill-pay-mcp/pay-status.md
- `pay_tab_list` — Read — https://policylayer.com/tools/io-github-pay-skill-pay-mcp/pay-tab-list.md
- `pay_webhook_list` — Read — https://policylayer.com/tools/io-github-pay-skill-pay-mcp/pay-webhook-list.md
- `pay_webhook_register` — Write — https://policylayer.com/tools/io-github-pay-skill-pay-mcp/pay-webhook-register.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=io-github-pay-skill-pay-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-pay-skill-pay-mcp