browser_http_request · MCP Macaco Playwright MCP

WHAT IT DOES

What browser_http_request does on MCP Macaco Playwright

AI agents invoke browser_http_request to trigger actions in MCP Macaco Playwright. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why browser_http_request needs a policy

This tool can execute arbitrary HTTP requests including state-mutating methods (POST, PUT, DELETE, PATCH) to any URL with custom headers and body. It can trigger external operations, modify remote resources, or cause irreversible side effects depending on the target endpoint.

From the tool's definition Make HTTP requests (GET, POST, PUT, DELETE, PATCH) with custom headers and body

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

browser_http_request Rate-limited

browser_http_request 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.

View as policy code

policy.json

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

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches MCP Macaco Playwright, so you can run agents against it safely.

FAQ

Questions about browser_http_request

What does the browser_http_request tool do? +

Make HTTP requests (GET, POST, PUT, DELETE, PATCH) with custom headers and body. It is categorised as a Execute tool in the MCP Macaco Playwright MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on browser_http_request? +

Register the MCP Macaco Playwright MCP server in PolicyLayer and add a rule for browser_http_request: 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 MCP Macaco Playwright. Nothing to install.

What risk level is browser_http_request? +

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

Can I rate-limit browser_http_request? +

Yes. Add a rate_limit block to the browser_http_request 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 browser_http_request completely? +

Set action: deny in the PolicyLayer policy for browser_http_request. 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 browser_http_request? +

browser_http_request is provided by the MCP Macaco Playwright MCP server (macacoai/mcp-playwright). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.