Just Domain - MCP Server
Check whether a domain is available and what it costs, and whether a domain you already own somewhere else could move here. Straight from chat.
Ask your AI assistant whether a name is free and what it costs, and it hands back a link to register it on justdomain.ai without leaving the conversation. Ask it about a domain you already own at another registrar and it reports what would block a transfer, whether your DNS survives the move, and the full-term transfer price. Both tools are read-only: nothing is bought, charged or changed in the chat.
- Website: https://justdomain.ai
- MCP endpoint:
https://mcp.justdomain.ai/ - Registry name:
ai.justdomain/just-domain - Transport: Streamable HTTP (remote, nothing to install)
- Auth: none. Both tools are read-only and unauthenticated.
Connecting
{
"mcpServers": {
"just-domain": {
"type": "streamable-http",
"url": "https://mcp.justdomain.ai/"
}
}
}
Then ask your assistant to check a domain.
Tools
| Tool | What it does |
|---|---|
search_domains | Check one or more domain names: returns availability, the registration price, the renewal price, and for available names a URL to open and register on justdomain.ai. Both prices are totals for one full registration term of that ending, not per-year rates: one year on most endings, two years on .ai, whose registry mandates a two-year term. Read-only; no order or payment in chat. |
check_domain_transfer | Precheck ONE domain you already own at another registrar: what would block a transfer, who sponsors it today, whether its DNS keeps working through the move, and the full-term transfer price. Answered from the registry's own public RDAP record plus our registrar's price list, so it reads no account and no database. An empty blockers list is the only thing that means ready. |
The same transfer facts are published over plain HTTP for agents with no MCP client:
GET https://mcp.justdomain.ai/api/transfer/precheck?domain=example.com
Unauthenticated, read-only, no key. It is served by the MCP host above, not by the justdomain.ai website.
What these tools will not do
- No purchase, no payment and no order is created by either tool. A registration is completed by a person in a browser on justdomain.ai.
- Moving a domain in is not a self-service function yet.
check_domain_transferreports whether a domain is eligible and what it would cost; the move itself is arranged by a person, and the route is [email protected]. - No authorization (EPP) code is ever returned, accepted or hinted at, and there is no agent path to unlocking a domain or to having a code issued. Moving a domain out is self-service, and self-service there means a human owner signed in on justdomain.ai in a browser: they switch the transfer lock off and get the code from their own account. An auth code is a bearer credential for the domain, and a chat transcript is not a place to put one.
- Premium names are reported but cannot be registered or transferred through Just Domain yet.
Agent Skill (ChatGPT / Codex / any SKILL.md runtime)
This repo also ships a SKILL.md-format
Agent Skill for Just Domain: a small package that teaches an agent when and how
to use the two tools, and where to stop. It lives at
skills/just-domain/.
Install (Codex / any GitHub-tree installer): point the skill installer at the GitHub tree URL:
https://github.com/just-done/just-domain-mcp/tree/main/skills/just-domain
Manual install: copy the skills/just-domain/ folder into your runtime's skills
directory: $CODEX_HOME/skills/ (or ~/.codex/skills/) for Codex, ~/.claude/skills/
for Claude.
The same package is served for discovery on the MCP host, for other runtimes and
/.well-known scanners:
- Index:
https://mcp.justdomain.ai/.well-known/agent-skills/index.json - Skill:
https://mcp.justdomain.ai/.well-known/agent-skills/just-domain/SKILL.md
The skill still needs the MCP server connected (see Connecting above). It declares
that dependency in agents/openai.yaml.
Who it's for
Anyone naming a project, business or idea in a chat, anyone wondering whether the domain they already own could move somewhere better, and AI agents that need a real availability lookup with a clean handoff to registration.
About this repository
Public metadata and registry listing for the Just Domain MCP server: server.json,
.mcp.json, icons, the skills/just-domain/ Agent Skill
package, and this README. The server runs at https://mcp.justdomain.ai/; its source
is not part of this repo.
License
MIT, see LICENSE.