add_relay_server

Add a relay server for NAT traversal.

SERVERYaver SOURCEyaver-cli

Medium RISK CLASS

Category Write

Parameters 41 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-kivanccakmak-yaver/add-relay-server.md

WHAT IT DOES

What add_relay_server does on Yaver

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

Parameter	Type	Required	Description
`label`	string	—	Human-friendly label
`http_url`	string	—	HTTP proxy URL
`password`	string	—	Relay password
`quic_addr`	string	Yes	QUIC address (host:port)

Parameters from the server's own tool schema.

RISK

Why add_relay_server is rated Medium

The tool creates a new relay server entry for NAT traversal, which is a reversible Write operation (the entry can be removed/modified later). It modifies application infrastructure configuration but does not execute arbitrary code, delete data, or move financial assets.

From the tool's definition Tool description states 'Add a relay server' — this creates/adds a new network configuration resource that did not previously exist.

Risk signalsHandles credentials or secrets (password)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs add_relay_server safely

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

add_relay_server Rate-limited

add_relay_server stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "add_relay_server": {
      "limits": [
        {
          "counter": "add_relay_server_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about add_relay_server

What does the add_relay_server tool do? +

Add a relay server for NAT traversal. It is categorised as a Write tool in the Yaver MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does add_relay_server accept? +

add_relay_server accepts 4 parameters: label, http_url, password, quic_addr. Required: quic_addr. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on add_relay_server? +

Register the Yaver MCP server in PolicyLayer and add a rule for add_relay_server: 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 Yaver. Nothing to install.

What risk level is add_relay_server? +

add_relay_server is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit add_relay_server? +

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

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

add_relay_server is provided by the Yaver MCP server (yaver-cli). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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