For agents

A registrar your AI can use.

Just Domain speaks the Model Context Protocol. Drop it into Claude, ChatGPT, Cursor, or any MCP-compatible client — one focused tool, no authentication, and checkout that always ends in the user's browser.

Add Just Domain to Claude
One click in Claude.ai — paste the MCP server URL, no authentication required.
1. Claude → Settings → Connectors → Add custom connector
2. URL: https://mcp.justdomain.ai/mcp
3. Authentication: None
✓ Connected. 1 tool available: search_domains
Available: search_domains
Need step-by-step instructions or copy-pasteable JSON? See the full MCP server documentation.
Tool surface

One tool. No surprises.

The MCP surface ships a single, focused tool. Everything else is intentionally out of reach — to keep the trust boundary obvious and the agent’s job simple.

search_domainsavailable
Checks availability and price for a list of candidate names. Returns a one-click checkout URL for each available result.
No purchase toolby design
There is no agent-callable buy tool. Money only flows when the user opens a checkout URL in their browser.
No DNS, transfer, or cancel toolsout of scope
DNS records, transfers, renewals, and cancellations are managed from the website dashboard — not from the agent.
No account or identity toolsby design
Search is anonymous. The MCP doesn't know who the user is and doesn't need to.
By design

What keeps this trustworthy.

No purchase path in the agent
There is no MCP tool that can charge a card. Every registration starts with the user clicking a checkout link and paying through Stripe in their own browser.
Anonymous by default
The MCP transport accepts queries from any client with no API key, no OAuth, and no account. Nothing about the user is sent to the registrar at search time.
Stripe handles every dollar
Card details never enter the conversation. Payment runs on Stripe's hosted checkout; Just Domain receives only a signed webhook confirming the charge.
ICANN-accredited fulfillment
Just Domain partners with ICANN-accredited registrars to register every name. The website handles registrant data, WHOIS, and renewal lifecycle.
Encrypted, minimally logged
All traffic is HTTPS/TLS. We log only operational metadata (timestamps, status codes) needed to run and debug the service.
One price, no agent surcharge
The price the agent quotes is the price the user pays at checkout. No markup for buying through an assistant.

Drop it in. Search a name. Hand off to the browser.

No API keys, no setup ceremony. Paste the MCP URL into your agent and start naming.

Open the full docs →See pricing