Customjs MCP

Name: Customjs MCP
Author: customjs

by customjsversion 1.0.0i★ –iRuns in the cloud

Registry namespace.customjs/customjs-mcp

Install

Overview

Description from the maker (original English)

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

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs in the cloud
Transport: Streamable HTTP
Category: Web & browsers
You need to fill in: x-customjs-api-key

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
You fill in yourself: x-customjs-api-key

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Run this in your terminal

claude mcp add --transport http customjs https://mcp.customjs.space/customjs/mcp --header 'x-customjs-api-key: your-value'

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "customjs": {
      "url": "https://mcp.customjs.space/customjs/mcp",
      "headers": {
        "x-customjs-api-key": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "customjs": {
      "type": "http",
      "url": "https://mcp.customjs.space/customjs/mcp",
      "headers": {
        "x-customjs-api-key": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

x-customjs-api-key secret required HTTP header
CustomJS API key (get one at https://www.customjs.space/integration/native-api/api-key)

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified against the domain customjs.space (the registry checks domain ownership)
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
… Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Web & browsersi

More stars than 0% of the other 879 servers in this category
Published to the registry more recently than 15% of the other 879 servers in this category
Basic checks equal to or better than 100% of the other 879 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Customjs MCP safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: x-customjs-api-key

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.0.0) reached the registry 5 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Browser Use, Chrome DevTools MCP, MCP Server Browser

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Browser Use

by browser-use

Lets AI do web tasks for you, such as filling forms, searching and extracting data, in the maker’s cloud browsers or on your computer.

Computer or cloud★ 120,087MITUpdated 17 days ago

Install

Chrome DevTools MCP

by ChromeDevTools

Lets AI use Chrome’s developer tools to inspect pages, find what makes them slow and spot errors. Made by the Chrome DevTools team.

Runs on your computer★ 54,821Apache-2.0Updated 15 days ago

Install

MCP Server Browser

by bytedance

MCP server for browser use access

Runs on your computer★ 39,550Apache-2.0Updated 14 months ago

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

CustomJS MCP Server

A remote Model Context Protocol server that gives AI agents web superpowers — host HTML pages on a public URL, generate PDFs, capture screenshots, scrape sites, and run sandboxed code — using your own CustomJS API key.


Endpoint	`https://mcp.customjs.space/customjs/mcp`
Transport	Streamable HTTP
Auth	`x-customjs-api-key` header (per-user API key)

There's nothing to install or self-host — it's a hosted remote MCP server. Bring your CustomJS API key and connect.

Tools

Tool	What it does
`customjs_host_html_page`	Publish static HTML and get a public `lp.customjs.space` URL (upsert by name)
`customjs_list_html_pages`	List your hosted pages (name, url, pageId)
`customjs_delete_html_page`	Delete a hosted page by name or pageId
`customjs_html_to_pdf`	Convert HTML to PDF (Nunjucks templating)
`customjs_markdown_to_pdf`	Convert Markdown to PDF
`customjs_screenshot`	Capture a full-page website screenshot
`customjs_scrape_html`	Extract fully-rendered HTML (JavaScript-aware)
`customjs_run_code`	Run JavaScript in a secure sandbox
`customjs_help`	Built-in usage examples (topics: pages, pdf, screenshot, scraping, code)

Get an API key

Create a free key at https://www.customjs.space/integration/native-api/api-key. Your key is sent per request as the x-customjs-api-key header and is never stored by the connector.

Connect

Claude Code — plugin (recommended)

/plugin marketplace add customjs/claude-plugin

/plugin install customjs@customjs-tools

You'll be prompted only for your API key. (See customjs/claude-plugin.)

Claude Code — without the plugin

claude mcp add --transport http \

--header "x-customjs-api-key: " \ customjs https://mcp.customjs.space/customjs/mcp

Claude Desktop (JSON config via `mcp-remote`)

"mcpServers": { "customjs": { "command": "npx", "args": [ "-y", "mcp-remote", "https://mcp.customjs.space/customjs/mcp", "--header", "x-customjs-api-key:${CUSTOMJS_API_KEY}" ], "env": { "CUSTOMJS_API_KEY": "your-key" } } } }

Other MCP clients (Cursor, VS Code, etc.)

Add a remote / HTTP MCP server pointing at https://mcp.customjs.space/customjs/mcp with the header x-customjs-api-key: .

Hosting HTML pages

customjs_host_html_page publishes static HTML and returns a public https://lp.customjs.space/ URL. Hosting again with the same name updates the existing page (upsert by name).

Note: the public URL is served via CloudFront, so immediately after an update it may briefly show the previous content until the cache refreshes.

Official MCP Registry

This server is published to the official MCP Registry as `space.customjs/customjs-mcp` (DNS-verified on customjs.space) — see server.json. For how it's published and the full directory list, see PUBLISHING.md.

License

The contents of this repository (documentation and registry manifest) are released under the MIT License. The CustomJS service itself requires a valid API key and is governed by CustomJS's terms of service at https://www.customjs.space.

Customjs MCP

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Web & browsersi

Common questions

Alternatives

Browser Use

Chrome DevTools MCP

MCP Server Browser

README from the maker

CustomJS MCP Server

Tools

Get an API key

Connect

Claude Code — plugin (recommended)

Claude Code — without the plugin

Claude Desktop (JSON config via mcp-remote)

Other MCP clients (Cursor, VS Code, etc.)

Hosting HTML pages

Official MCP Registry

Links

License

Claude Desktop (JSON config via `mcp-remote`)