130 lines
4.2 KiB
Markdown
130 lines
4.2 KiB
Markdown
`obscura mcp` exposes obscura as a Model Context Protocol server so MCP-capable clients (Claude Desktop, Claude Code, etc.) can drive it.
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## Run
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Stdio (default, for direct client integration):
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```bash
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obscura mcp
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```
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HTTP (for remote or shared use):
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```bash
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obscura mcp --http --port 3000
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```
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The HTTP transport binds `127.0.0.1` by default. Bind all interfaces with `--host` for a container or sidecar deployment:
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```bash
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obscura mcp --http --host 0.0.0.0 --port 3000
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```
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With stealth and proxy:
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```bash
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obscura mcp --stealth --proxy http://proxy.example.com:8080
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```
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## Security
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The HTTP transport has no built-in auth, so anyone who can reach the port can drive the browser. Two guards ship for the HTTP transport:
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- **Origin allowlist.** Set `OBSCURA_MCP_ALLOWED_ORIGINS` to a comma-separated list of allowed `Origin` values. When set, a browser request from an unlisted origin is refused with `403` before it can drive the server, which blocks a malicious page from POSTing to a loopback MCP port. Native, non-browser clients send no `Origin` and are always allowed. Unset (the default) keeps the permissive behavior.
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- **Body cap.** A single request body is capped at 16 MiB, so an unauthenticated caller cannot force a large allocation with an oversized `Content-Length`.
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```bash
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OBSCURA_MCP_ALLOWED_ORIGINS="https://app.example.com" obscura mcp --http --host 0.0.0.0
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```
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When you expose the HTTP transport beyond loopback, set the allowlist and put it behind a reverse proxy or network isolation that enforces auth.
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## Tools exposed
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The server keeps a live browser session, so tools operate on the current page rather than taking a URL each call. Navigate first, then read or act.
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Navigation and lifecycle:
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- `browser_navigate`, `browser_back`, `browser_forward`, `browser_reload`, `browser_close`
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Read the page:
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- `browser_snapshot`: current URL, title, readable body text, and interactive
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element references. Optional `max_chars` limits the returned text.
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- `browser_markdown`, `browser_links`, `browser_extract`: page as markdown, link list, or structured content.
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- `browser_interactive_elements`, `browser_detect_forms`: actionable elements and form fields.
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- `browser_get_attribute`, `browser_count`, `browser_search`: read an attribute, count matches, find text.
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Interact:
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- `browser_click`, `browser_fill`, `browser_fill_form`, `browser_type`, `browser_press_key`, `browser_select_option`, `browser_scroll`
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Wait and run JS:
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- `browser_wait_for`, `browser_wait_for_text`, `browser_evaluate`
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Diagnostics:
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- `browser_network_requests`, `browser_console_messages`
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Visual output (render-enabled builds):
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- `browser_screenshot`: current viewport as an MCP `image/png` content block.
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- `browser_pdf`: current page as an embedded `application/pdf` resource.
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`browser_screenshot` accepts optional positive `width` and `height` values in
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CSS pixels and enforces a bounded capture size. `browser_pdf` accepts
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`landscape`, `print_background`, `scale`, paper width/height, and top, bottom,
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left, and right margins. Paper dimensions and margins are measured in inches.
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Cookies and storage:
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- `browser_get_cookies`, `browser_set_cookie`, `browser_clear_cookies`, `browser_storage_state`, `browser_set_storage_state`
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Tabs:
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- `browser_tab_new`, `browser_tab_list`, `browser_tab_switch`, `browser_tab_close`
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Element references describe the current rendered page state and can become
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stale after navigation, interaction, scrolling, or a framework rerender. Take
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a fresh snapshot or interactive-element listing before acting again.
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MCP exposes still-image and PDF output. It does not stream video frames; use
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CDP `Page.startScreencast` for activity-driven screencasting.
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## Claude Desktop
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Edit `~/Library/Application Support/Claude/claude_desktop_config.json` (macOS) or `%APPDATA%\Claude\claude_desktop_config.json` (Windows):
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```json
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{
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"mcpServers": {
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"obscura": {
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"command": "/path/to/obscura",
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"args": ["mcp"]
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}
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}
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}
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```
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Restart Claude Desktop. The obscura tools appear in the tool list.
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## Claude Code
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```bash
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claude mcp add obscura /path/to/obscura mcp
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```
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## With stealth in config
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```json
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{
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"mcpServers": {
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"obscura": {
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"command": "/path/to/obscura",
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"args": ["mcp", "--stealth"]
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}
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}
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}
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```
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