test_webhook

THE RISK

High Risk

This tool triggers an external HTTP request to a webhook endpoint, which constitutes executing an external operation. The effects depend on what the webhook recipient does with the test event (e.g., triggering automations, notifications, or data processing). It is not merely reading data, but actively firing an outbound request to an external system.

From the tool's definition Send a test event to a webhook

Documented attack patterns abuse exactly the kind of access test_webhook gives an agent:

HOW TO CONTROL TEST_WEBHOOK

PolicyLayer is an MCP gateway — it sits between your AI agents and GoHighLevel MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for test_webhook:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "test_webhook": {
      "limits": [
        {
          "counter": "test_webhook_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

test_webhook stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register GoHighLevel MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
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FAQ

What does the test_webhook tool do? +

Send a test event to a webhook. It is categorised as a Execute tool in the GoHighLevel MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on test_webhook? +

Register the GoHighLevel MCP Server MCP server in PolicyLayer and add a rule for test_webhook: 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 GoHighLevel MCP Server. Nothing to install.

What risk level is test_webhook? +

test_webhook is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit test_webhook? +

Yes. Add a rate_limit block to the test_webhook 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.

How do I block test_webhook completely? +

Set action: deny in the PolicyLayer policy for test_webhook. 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.

What MCP server provides test_webhook? +

test_webhook is provided by the GoHighLevel MCP Server MCP server (busybee3333/go-high-level-mcp-2026-complete). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every GoHighLevel MCP Server tool call.

Deterministic rules across all 566 GoHighLevel MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

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// WHAT TEST_WEBHOOK ON GOHIGHLEVEL MCP SERVER DOES

// THE RISK

// HOW TO CONTROL TEST_WEBHOOK

// EXPLORE