# pay_webhook_register

Register a webhook to receive real-time payment event notifications.\n\n

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

## Facts

- Tool: `pay_webhook_register`
- 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: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

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

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

## Why pay_webhook_register is rated Medium

Registering a webhook is a Write operation: it creates a persistent configuration record (a webhook endpoint) in the system. While it exists in a financial server context, the tool itself does not move money or commit financial obligations — it merely sets up a notification listener. It is reversible (webhooks can be unregistered).

From the tool's own definition: "'Register a webhook to receive real-time payment event notifications' — this creates a new webhook registration entry"

## Use case

AI agents use pay_webhook_register to create or update resources in Pay Mcp, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Pay Mcp environment.

## Recommended policy (PolicyLayer)

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

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "pay_webhook_register": {
      "limits": [
        {
          "counter": "pay_webhook_register_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## 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_close` — Financial — https://policylayer.com/tools/io-github-pay-skill-pay-mcp/pay-tab-close.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

## 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