DomainCheckr MCP Server

by nach-dakwale Your server? Claim it

answering

DomainCheckr is answering right now. Last checked 15 min ago. It exposes 3 tools. Last commit 14 Mar 2026.

Check domain name availability via RDAP. Single, bulk, and smart suggestions. No API key needed.

The author archived this repository on GitHub, meaning it is no longer maintained.

Uptime history 91 days of history · worst day 0%

91 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

1020 ms

Response time

average over 24h

Stars

last commit 14 Mar 2026

This one has been quiet for a while

Quiet is not dead — but it is worth knowing when it wakes up, or when someone else takes it over. We watch the repository and tell you either way.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 15 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add domaincheckr --transport http https://domaincheckr.fly.dev/mcp

Settings → Connectors → Add custom connector, then paste this address

https://domaincheckr.fly.dev/mcp

~/.codex/config.toml

[mcp_servers.domaincheckr]
url = "https://domaincheckr.fly.dev/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "domaincheckr": {
      "url": "https://domaincheckr.fly.dev/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "domaincheckr": {
      "type": "http",
      "url": "https://domaincheckr.fly.dev/mcp"
    }
  }
}

Available tools 3

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

add

add

Adds two numbers and returns the sum.

echo

echo

Echoes the provided text back to the caller.

server

server_time

Returns the current server time (ISO 8601, UTC).

Endpoints

URL	Transport	State	Latency	Checked
https://domaincheckr.fly.dev/mcp	streamable-http	answering	184 ms	15 min ago

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DomainCheckr — questions

Answers built from our own checks of this server.

What can DomainCheckr do?

It exposes 3 tools, read directly from the server on our last check. Among them: add, echo, server_time. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is DomainCheckr working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 1020 ms. The bar chart above shows every period we have measured.

Is DomainCheckr still maintained?

The author archived this repository on GitHub, meaning it is no longer maintained. We show this because it changes what you can expect: an unmaintained server may keep answering for months and then stop without warning.

How do I connect DomainCheckr?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does DomainCheckr need an API key?

No. DomainCheckr completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 3 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is DomainCheckr?

It answers our handshake in 1020 ms on average, which is faster than 4% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is DomainCheckr open source?

The code is open source: it is published under the MIT licence, written in Python and 0 stars on GitHub. The licence covers the code in the repository, not the hosted service at domaincheckr.fly.dev, which runs on its operator's own terms.