Customjs MCP Server

by customjs Your server? Claim it

answering

Customjs MCP is answering right now. Last checked 5 min ago. Last commit 11 Jun 2026.

Host static HTML pages, generate PDFs, screenshots, scrape JS sites, run sandboxed JavaScript.

Uptime history 51 days of history · worst day 95%

51 days agonow

98.9%

Uptime 24h

90 of 91 checks

—

Tools

hidden behind auth

271 ms

Response time

average over 24h

Stars

last commit 11 Jun 2026

Customjs MCP does not always answer

Over the last week it answered 98.9% 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 5 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add customjs-mcp --transport http https://mcp.customjs.space/customjs/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "customjs-mcp": {
      "url": "https://mcp.customjs.space/customjs/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.customjs-mcp]
url = "https://mcp.customjs.space/customjs/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "customjs-mcp": {
      "url": "https://mcp.customjs.space/customjs/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "customjs-mcp": {
      "url": "https://mcp.customjs.space/customjs/mcp"
    }
  }
}

This endpoint answered with an authorization challenge. The server is running, and it signs you in through your browser: there is no API key to paste.

Endpoints

URL	Transport	State	Latency	Checked
https://mcp.customjs.space/customjs/mcp	streamable-http	sign-in	294 ms	5 min ago

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Customjs MCP — questions

Answers built from our own checks of this server.

Why is there no tool list for Customjs MCP?

The server answered our handshake with an authorization challenge, so it is running — but it will not describe its tools to an anonymous client. To see them you need to connect with your own credentials. We record it as alive, not as broken: 98.9% of checks in the last 24 hours got a reply.

Is Customjs MCP working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 90 of 91 checks got a reply (98.9%), average response time 271 ms. The bar chart above shows every period we have measured.

How do I connect Customjs MCP?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address. You sign in through your browser once and the client keeps the session: no key to copy, and it refuses anonymous clients.

How do you sign in to Customjs MCP?

No API key is involved. Customjs MCP answers our knock with an OAuth challenge, so you authorise it once in your browser and the client keeps the session. That is also why we see no tool list: it will not describe itself to an anonymous client, and that is the server working as intended, not a fault.

How fast is Customjs MCP?

It answers our handshake in 271 ms on average, which is faster than 57% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Customjs MCP open source?

Yes — it is published under the MIT licence and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.