Customjs Mcp

space.customjsPublished by customjs.spaceOfficial publisherv1.0.0Updated Oct 24, 2026

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

VerifiedStreamable HTTPWeb executableWeb Search & ScrapingFiles & StorageDeveloper Tools

Overview

AI-generated overview

Hosted CustomJS MCP server that lets an assistant publish HTML pages, make PDFs and screenshots, scrape rendered sites, and run sandboxed JavaScript.

What you can do
  • Publish, list and delete static HTML pages on public URLs, with upsert by name
  • Convert HTML or Markdown into PDF documents
  • Capture full-page screenshots of websites
  • Scrape fully rendered, JavaScript-aware HTML from pages
  • Run JavaScript in a secure sandbox
  • Show built-in usage examples for pages, PDF, screenshots, scraping and code
When to use it
Useful when an assistant needs to turn generated HTML or Markdown into a shareable public page or PDF, capture a screenshot of a site, extract content from JavaScript-heavy pages, or execute small JavaScript snippets without a local runtime.
Requirements
A remote streamable HTTP endpoint; nothing to install or self-host. Requires a CustomJS API key, sent per request in the x-customjs-api-key header (OAuth is also declared). Some clients connect through the mcp-remote npm package. Network access to the CustomJS service is needed.
Before you install
The API key is a credential sent with every request; keep it out of shared configs. Hosting publishes content to a public URL, and re-hosting with the same name overwrites the existing page; deletion removes pages. Scraping and screenshots send target URLs to a third-party service, and the public URL may briefly serve stale content after an update because of caching.

Installation

In SourceWeft

  1. Open Customjs Mcp in the dashboard and add it to a workspace.
  2. Connect the required credentials. They are stored privately and never shown on public pages.
  3. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/space.customjs%2Fcustomjs-mcp/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config. The client completes OAuth sign-in on first connect.

{
  "mcpServers": {
    "customjs": {
      "type": "http",
      "url": "https://mcp.customjs.space/customjs/mcp"
    }
  }
}

README

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.

Endpointhttps://mcp.customjs.space/customjs/mcp
TransportStreamable HTTP
Authx-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

ToolWhat it does
customjs_host_html_pagePublish static HTML and get a public lp.customjs.space URL (upsert by name)
customjs_list_html_pagesList your hosted pages (name, url, pageId)
customjs_delete_html_pageDelete a hosted page by name or pageId
customjs_html_to_pdfConvert HTML to PDF (Nunjucks templating)
customjs_markdown_to_pdfConvert Markdown to PDF
customjs_screenshotCapture a full-page website screenshot
customjs_scrape_htmlExtract fully-rendered HTML (JavaScript-aware)
customjs_run_codeRun JavaScript in a secure sandbox
customjs_helpBuilt-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)

text
/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

bash
claude mcp add --transport http \  --header "x-customjs-api-key: <your-key>" \  customjs https://mcp.customjs.space/customjs/mcp

Claude Desktop (JSON config via mcp-remote)

json
{  "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: <your-key>.

Hosting HTML pages

customjs_host_html_page publishes static HTML and returns a public https://lp.customjs.space/<shortId> 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.

Links

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.

Source: README.md at commit c009173

Tools

0
This server asks you to sign in, so SourceWeft could not read its tools without an account and has not indexed them. What a connected account sees can depend on that account and its permissions.

Version history

1
  1. v1.0.0LatestSep 16, 2026

Score

85% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts