Username Inspector MCP Server

by usernameinspector Your server? Claim it

not responding

Username Inspector is listed as active in the registry but did not answer our last check. It exposes 2 tools. Last commit 14 Oct 2026.

Look up username availability on 12 resale platforms (links where blocked); compare seller fees.

Uptime history 29 days of history · worst day 15%

29 days agonow

42.4%

Uptime 24h

39 of 92 checks

Tools

read from the server

615 ms

Response time

average over 24h

Stars

last commit 14 Oct 2026

What changed 4

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 14 October 2026. No other catalogue keeps this.

14 Oct 2 tool descriptions were rewritten check_username, compare_fees

14 Oct 2 tools changed the parameters they ask for check_username, compare_fees

Username Inspector does not always answer

Over the last week it answered 39.8% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 2 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add username-inspector --transport http https://usernameinspector.com/api/mcp

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

https://usernameinspector.com/api/mcp

~/.codex/config.toml

[mcp_servers.username-inspector]
url = "https://usernameinspector.com/api/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "username-inspector": {
      "url": "https://usernameinspector.com/api/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "username-inspector": {
      "type": "http",
      "url": "https://usernameinspector.com/api/mcp"
    }
  }
}

Available tools 2

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

compare

compare_fees

Compare what a US sale keeps after fees on 7 platforms. Example: price=45, item_cost=12 ranks platforms by profit.

username

check_username

Check if ONE username is free on 12 resale platforms. Example: username='vintage_finds' returns available, taken, or unverified per platform.

Endpoints

URL	Transport	State	Latency	Checked
https://usernameinspector.com/api/mcp	streamable-http	answering	21 ms	2 min ago

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Username Inspector — questions

Answers built from our own checks of this server.

What can Username Inspector do?

It exposes 2 tools, read directly from the server on our last check. Among them: check_username, compare_fees. 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 Username Inspector working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 39 of 92 checks got a reply (42.4%), average response time 615 ms. The bar chart above shows every period we have measured.

The registry lists Username Inspector as active — why does it not respond?

The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.

How do I connect Username Inspector?

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 Username Inspector need an API key?

No. Username Inspector completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 2 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Username Inspector?

It answers our handshake in 615 ms on average, which is faster than 16% 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 Username Inspector open source?

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