list_clients

List every client across all inbounds on the panel, with their email, protocol, enabled state, and traffic limits.

SERVER3xui SOURCE3xui-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/3xui-mcp/list-clients.md

WHAT IT DOES

What list_clients does on 3xui

AI agents call list_clients to retrieve information from 3xui without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why list_clients is rated Low

Even though list_clients only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

Risk signalsBulk/mass operation — affects multiple targets

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs list_clients safely

PolicyLayer is an MCP gateway: it sits between your AI agents and 3xui, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For list_clients, this is the rule to start with:

list_clients Allowed

list_clients is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

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

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect 3xui, apply this rule, and every list_clients call is checked against it from then on.

FAQ

Questions about list_clients

What does the list_clients tool do? +

List every client across all inbounds on the panel, with their email, protocol, enabled state, and traffic limits. It is categorised as a Read tool in the 3xui MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_clients? +

Register the 3xui MCP server in PolicyLayer and add a rule for list_clients: 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 3xui. Nothing to install.

What risk level is list_clients? +

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

Can I rate-limit list_clients? +

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

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

list_clients is provided by the 3xui MCP server (3xui-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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