network_export_har

THE RISK

Low Risk

Why network_export_har needs a policy

This tool reads and exports captured network traffic data into HAR format. It retrieves existing network capture data without modifying or deleting anything. Severity is medium because HAR files can contain sensitive data like auth tokens, cookies, and request/response bodies that could be exfiltrated.

From the tool's definition Export network traffic to HAR (HTTP Archive) format

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

POLICY

How to control network_export_har

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "network_export_har": {}
  }
}

network_export_har is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

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

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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All 16 Browser Connect tools →

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about network_export_har

What does the network_export_har tool do? +

Export network traffic to HAR (HTTP Archive) format. It is categorised as a Read tool in the Browser Connect MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on network_export_har? +

Register the Browser Connect MCP server in PolicyLayer and add a rule for network_export_har: 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 Browser Connect. Nothing to install.

What risk level is network_export_har? +

network_export_har is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit network_export_har? +

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

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

network_export_har is provided by the Browser Connect MCP server (perception30/browser-connect-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Browser Connect tool call.

Start from Browser Connect, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →