skill

# Screen Browser skill

Narrated demo and tutorial videos of your web app, from a guide or your coding agent.

Ask the agent that knows your codebase for a tutorial video of a feature. It writes the walkthrough
in the words your buttons and fields use, [Screen Browser](https://screenbrowser.com) records a real
browser following it against your deployed app, narrates it, adds the on-screen effects, and the
agent hands you the MP4 with a GIF, subtitles and chapters. When the app changes, edit a line and
ask again.

[![The first chapter of a tutorial video Claude Code made from one sentence: a campaign being created in Chatamatic, narrated and captioned](https://media.screenbrowser.com/guides/claude-code-demo-video/create-a-campaign-chapter-1-v14.gif)](https://screenbrowser.com/guides/claude-code-demo-video/)

That is the first chapter of a 66-second video made from the request *"make a tutorial video of
creating a campaign"*. The whole session, from that sentence to the finished video with the exact
prompt and every screen along the way, is in the
[Claude Code guide](https://screenbrowser.com/guides/claude-code-demo-video/).

This repository gives your agent two things:

- **The `screenbrowser` skill** — how to read your codebase and write the two guides Screen Browser
  needs (the login flow and the walkthrough), which effect fits which moment, how to check a guide
  for free before recording, and how to review the video before handing it over.
- **The MCP server configuration** — the tools the agent calls: create the project, upload guides,
  check them, start the run, poll it, fetch the video. The server itself is part of your Screen
  Browser account at `https://mcp.screenbrowser.com`.

Claude Code, Codex, Cursor or any MCP client can use it. Sign-in happens in the browser; there is
no key to paste.

## Install (Claude Code)

Add this repository as a plugin marketplace and install the plugin:

```bash
claude plugin marketplace add screenbrowser/skill
claude plugin install screenbrowser@screenbrowser
```

The first time the agent reaches for a Screen Browser tool, Claude Code opens your browser: sign in
to Screen Browser, approve the connection, and you are done. Nothing to copy. (If it does not
prompt, run `/mcp` and pick **screenbrowser → Authenticate**.)

Without the plugin system, register the server yourself and copy the skill:

```bash
claude mcp add --transport http screenbrowser https://mcp.screenbrowser.com
cp -r skills/screenbrowser ~/.claude/skills/
```

### With an API key instead

If your agent cannot open a browser to sign in, create a key under **Settings → API keys** in
Screen Browser and pass it as a bearer token:

```bash
claude mcp add --transport http screenbrowser https://mcp.screenbrowser.com \
  --header "Authorization: Bearer <your API key>"
```

Any MCP client works the same way: Streamable HTTP at `https://mcp.screenbrowser.com`, OAuth 2.1 with
dynamic client registration for interactive sign-in, or `Authorization: Bearer <key>`.

### Other agents

The skill is a plain `SKILL.md` in the open Agent Skills format, and the server is standard MCP over
HTTP, so the same two pieces work outside Claude Code.

**Cursor, VS Code, GitHub Copilot and other Agent Plugins clients** — this repository is also an
[Agent Plugins](https://agent-plugins.org/) package (`plugin.json`, `mcp.json`, `skills/`), so
install it as a plugin from the repository URL and sign in when the client offers. Cursor without
the plugin: add the server to `.cursor/mcp.json` (or the global one in Cursor settings), click
**Sign in** next to it, and copy the skill into `.cursor/skills/`:

```json
{
  "mcpServers": {
    "screenbrowser": { "url": "https://mcp.screenbrowser.com" }
  }
}
```

```bash
mkdir -p .cursor/skills && cp -r skills/screenbrowser .cursor/skills/
```

**OpenAI Codex CLI** — add the server to `~/.codex/config.toml`, sign in once, and copy the skill
into Codex's skills folder:

```toml
[mcp_servers.screenbrowser]
url = "https://mcp.screenbrowser.com"
```

```bash
codex mcp login screenbrowser
mkdir -p ~/.codex/skills && cp -r skills/screenbrowser ~/.codex/skills/
```

**Anything else (Gemini CLI, Windsurf, a custom agent)** — register an HTTP MCP server with the URL
the way that tool documents it; a client that supports OAuth will sign you in, one that does not
takes the API key as an `Authorization: Bearer` header. Give the agent `skills/screenbrowser/SKILL.md`
as instructions (paste it, or point the tool's rules file at it). The MCP server itself also carries
the guide syntax as a resource and a `write-tutorial-guide` prompt, so a client with MCP prompts can
work without the skill file at all.

## Use

Videos can be recorded on the desktop or as a phone or tablet (`device: iphone`, `android`, `ipad`,
…), in a phone frame on a vertical 9:16 or widescreen 16:9 canvas or as the bare screen; one run is
one device.

Open your app's repository in Claude Code and ask:

> Make a tutorial video of creating a campaign.

The agent will check credits, create the project (it will ask you for the deployed URL, a demo
user, and the legal attestation), write the guides from your routes and templates, validate them,
show them to you, start the run, and give you the video link a few minutes later.

The MCP server also ships a `write-tutorial-guide` prompt that walks any client through the same
flow, and two resources: `screenbrowser://guide-syntax` and `screenbrowser://example-guides`.

## What your app needs

- A **demo user** that signs in with email and password: no OAuth, no 2FA, no captcha. Seed it with
  realistic data.
- The deployed URL to record (staging is fine) and every host the app talks to (API subdomain,
  auth provider, CDN).
- Confirmation that you are allowed to record the app (yours, a client's with permission, or an
  internal tool).

## What it sends, and where

Everything the plugin does goes to one place: the Screen Browser MCP server at
`https://mcp.screenbrowser.com`, over HTTPS, signed in with your Screen Browser account. The
skill itself is instructions for the agent; it runs nothing on your machine and fetches nothing.

What the agent sends to Screen Browser when you ask for a video:

- the project's settings: your app's URL, the hosts it talks to, the sign-in check, narration
  language and voice;
- the guides it writes from your code: plain sentences naming buttons and fields as they appear on
  screen. Read them before they are saved; the agent shows them to you;
- the demo user's credentials, as project variables. Screen Browser stores them encrypted, uses
  them only to sign in during a recording, and never returns them through any tool or shows them
  to any model;
- run commands: start, poll, cancel, and, only if you agree, a failure report with the recorder's
  screenshot and logs of a run that failed on Screen Browser's side.

It never sends your source code. The agent reads your repository locally to learn the labels; only
the guide text leaves the machine. Nothing is sent to any other service. What Screen Browser keeps,
and for how long, is in the [privacy policy](https://screenbrowser.com/legal/privacy/).

## What it costs

Plans start at $49 a month, sized in minutes of finished video. Checking a guide before recording
is free, and a run that fails is not charged. Videos are capped at five minutes; there is no free
plan. Current prices are on the [pricing page](https://screenbrowser.com/pricing/).

## Layout

```
plugin.json                        Agent Plugins manifest (Cursor, VS Code, Copilot, …)
mcp.json                           Agent Plugins MCP config (the URL; sign-in is OAuth)
.claude-plugin/plugin.json         Claude Code plugin manifest
.claude-plugin/marketplace.json    lets this repo act as its own Claude Code marketplace
.mcp.json                          Claude Code MCP server config
skills/screenbrowser/SKILL.md      the skill
skills/screenbrowser/references/   guide syntax reference, worked example
examples/chatamatic/               a real auth guide + main guide pair
```

## What a guide looks like

Plain language, one step per line, naming things as they appear on screen. Screen Browser turns it
into the script — the narration, the highlights, the pacing — and resolves each step against the
live page:

```
Go to https://app.acme.test/campaigns
"Let's create a spring promotion."
Click "New campaign"
Type "Spring promo" into the Name field
Click "Save"
Confirm text "Campaign created" is visible
```

Ids and `name=` attributes are allowed when a step needs precision; class names generated by a build
tool are refused. The full reference, including the optional effect directives, is in
[`skills/screenbrowser/references/guide-syntax.md`](skills/screenbrowser/references/guide-syntax.md).

## Documentation index for AI agents

The skill carries everything an agent needs to write a guide and run a recording. For anything else —
prerequisites, costs, limitations, the API — https://screenbrowser.com/llms.txt is a Markdown index
of the public documentation, and https://screenbrowser.com/docs/agents/ is the reference for this
integration.

## Support

Issues and ideas about the skill are welcome in this repository. Anything about your account or a
particular recording: use the contact form at https://screenbrowser.com/contact/.

## License

MIT. Screen Browser itself is a hosted service; this repository contains only the agent-facing
skill, configuration and examples.