whois.domain.availability

Check if a domain name is available for registration — fast DNS check or thorough DNS+WHOIS verification (WhoisXML)

SERVERApibase SOURCEapibase-mcp-client

Low RISK CLASS

Category Read

Parameters 21 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-whiteknightonhorse-apibase/whois.domain.availability.md

WHAT IT DOES

What whois.domain.availability does on Apibase

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

Parameter	Type	Required	Description
`mode`	string	—	Check mode: DNS_ONLY is fast, DNS_AND_WHOIS is more accurate (default DNS_AND_WHOIS)
`domain`	string	Yes	Domain name to check availability for (e.g. "example.com", "mybrand.io")

Parameters from the server's own tool schema.

RISK

Why whois.domain.availability is rated Low

Tool performs read-only queries of domain availability data without side effects or modifications.

From the tool's definition Check if a domain name is available for registration — fast DNS check or thorough DNS+WHOIS verification

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs whois.domain.availability safely

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

whois.domain.availability Allowed

whois.domain.availability 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": {
    "whois.domain.availability": {}
  }
}

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

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

FAQ

Questions about whois.domain.availability

What does the whois.domain.availability tool do? +

Check if a domain name is available for registration — fast DNS check or thorough DNS+WHOIS verification (WhoisXML). It is categorised as a Read tool in the Apibase MCP Server, which means it retrieves data without modifying state.

What parameters does whois.domain.availability accept? +

whois.domain.availability accepts 2 parameters: mode, domain. Required: domain. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on whois.domain.availability? +

Register the Apibase MCP server in PolicyLayer and add a rule for whois.domain.availability: 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 Apibase. Nothing to install.

What risk level is whois.domain.availability? +

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

Can I rate-limit whois.domain.availability? +

Yes. Add a rate_limit block to the whois.domain.availability 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 whois.domain.availability completely? +

Set action: deny in the PolicyLayer policy for whois.domain.availability. 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 whois.domain.availability? +

whois.domain.availability is provided by the Apibase MCP server (apibase-mcp-client). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Apibase, and thousands of servers like it.

This server

All 1384 Apibase tools →

Across the catalogue

The MCP Attack Database →

Guides

Roll out MCP under one policy →Data exfiltration →MCP token cost →