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MCP server for Sublime Text 4. Lets Claude Code read and control a running ST instance.
About
MCP server for Sublime Text 4. Lets Claude Code read and control a running ST instance.
Security Report
2.8
Use Caution2.8Critical RiskThe sublime-mcp server exposes extensive local editor control via an unauthenticated HTTP API, creating significant security risks if the HTTP server is misconfigured or accessible beyond localhost. While the code is well-structured and documentation clearly warns against network exposure, the `eval_python` tool allows arbitrary code execution on the user's machine, and there is no authentication mechanism to prevent unauthorized access from other local processes. The combination of unrestricted local access and arbitrary code execution capabilities presents a moderate to high risk depending on the threat model. Supply chain analysis found 4 known vulnerabilities in dependencies (1 critical, 3 high severity). Package verification found 1 issue.
4 files analyzed · 16 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
How to Install
Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-dpc00-sublime-mcp": {
"args": [
"sublime-mcp"
],
"command": "uvx"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
sublime-mcp
MCP server for Sublime Text 4. Lets Claude Code (or any MCP client) read and control a running ST instance via a local HTTP bridge.
58 tools covering reading, navigation, editing, searching, build, Terminus integration, settings, layout, and live Python scripting.
Architecture
Claude Code (MCP client)
│ stdio / MCP protocol
▼
mcp_server.py ← Python process you run outside ST
│ HTTP 127.0.0.1:9500
▼
sublime_mcp.py ← ST plugin, HTTP server on ST's main thread
│ sublime API
▼
Sublime Text 4
| File | Role |
|---|---|
sublime_mcp.py | ST plugin — runs an HTTP server inside Sublime Text |
mcp_server.py | MCP server — wraps the HTTP API for MCP clients |
Installation
1. Install the ST plugin
Copy sublime_mcp.py to your Sublime Text Packages/User/ folder:
%APPDATA%\Sublime Text\Packages\User\sublime_mcp.py
ST loads it automatically on start (or via Tools › Developer › New Plugin…
then save over it). You should see:
sublime-mcp: listening on 127.0.0.1:9500
in the ST console (View › Show Console).
2. Install the MCP server
pip install sublime-mcp
3. Register with Claude Code
Add to ~/.claude/settings.json:
{
"mcpServers": {
"sublime": {
"command": "sublime-mcp"
}
}
}
Then restart Claude Code. Tools will appear with the mcp__sublime__ prefix.
Then restart Claude Code. Tools will appear with the mcp__sublime__ prefix.
Tools
Read / Introspect
| Tool | Description |
|---|---|
get_active_file | Path, full content, cursor line/col, dirty flag, and syntax name |
get_selection | Current selection(s): text and begin/end line+col for each |
get_cursor_context | lines lines above and below cursor, with 1-based line numbers prepended |
get_open_files | All files open in the current window (path, name, is_dirty) |
get_project_folders | Project root folder paths |
get_file_content | Full content of any already-open file by path |
get_view_content | Full content of any open tab by name (partial match). Works for Terminus tabs and nameless views |
get_view_size | Total character count of any open tab. Use to compute offsets before get_view_chars |
get_view_chars | Text at character offsets begin..end (0-based, end exclusive). Clamps to buffer bounds |
get_view_phantoms | Phantom HTML and extracted plain text from a named view; filters by phantom key |
get_output_panel | Text content of a named output panel. Omit name for the active panel; name='exec' for build output |
get_active_panel | Active panel id and, if it is an output panel, its content |
get_symbols | All symbols (functions, classes, etc.) in the active file with line numbers |
lookup_symbol | Find where a symbol is defined across all open files |
get_project_data | Raw .sublime-project JSON for the current project |
get_variables | ST build variables: $file, $project_path, $platform, etc. |
get_command_palette | Command Palette entries from installed *.sublime-commands resources; filterable by package, command, or caption |
get_commands | Runnable command ids from loaded command classes, optionally merged with palette metadata |
get_menu_items | Menu items from *.sublime-menu resources; filterable by menu filename, caption, or command |
get_syntaxes | All syntax definitions available in ST (name + path) |
get_scope_at_cursor | Full syntax scope string at the cursor position |
get_word_at_cursor | Word under the cursor and its line/col |
get_bookmarks | All bookmarked positions in the active file |
get_line_count | Total number of lines in the active file |
get_encoding | Character encoding of the active file |
get_setting | A ST setting by key. scope='view' (default) or 'window' |
get_layout | Current window layout (groups, cells) and which files are in each group |
Navigate
| Tool | Description |
|---|---|
open_file | Open a file, optionally jumping to a specific line and column |
goto_line | Move cursor to line (and optional column) in the active file |
show_panel | Bring an output panel to the front. Default name='exec' for the build panel |
focus_group | Move focus to a pane group by 0-based index |
Edit
| Tool | Description |
|---|---|
replace_selection | Replace the current selection(s) with text |
replace_lines | Replace lines begin..end (inclusive, 1-based) in the active file |
insert_snippet | Insert at the cursor using ST snippet syntax ($1 for tab stops, etc.) |
duplicate_line | Duplicate the current line(s) |
toggle_comment | Toggle line comment, or block comment if block=True |
sort_lines | Sort selected lines, or all lines if nothing is selected |
select_lines | Select lines begin..end (1-based, inclusive) |
fold_lines | Fold (collapse) lines begin..end in the active file |
undo | Undo the last edit |
redo | Redo the last undone edit |
run_command | Run any ST command with optional args. scope='window' (default) or 'view' |
Search
| Tool | Description |
|---|---|
find_in_file | Find all occurrences of a pattern in the active file. Returns {line, col, text} list |
find_in_files | Search across project folders (or a supplied list). Skips .git, __pycache__, node_modules, .venv. Returns {path, line, match} list, capped at max_results (default 200) |
File / Project
| Tool | Description |
|---|---|
save_file | Save the active file |
save_all | Save all open files |
close_file | Close a file by path, or the active file if path is omitted |
revert_file | Revert the active file to its last saved state |
add_folder | Add a folder to the current project (no-op if already present) |
remove_folder | Remove a folder from the current project by path |
Syntax / Encoding
| Tool | Description |
|---|---|
set_syntax | Set the syntax of the active file by name (case-insensitive partial match) |
set_encoding | Set the character encoding of the active file (e.g. 'UTF-8', 'Western (Windows 1252)') |
Settings / Window
| Tool | Description |
|---|---|
set_setting | Set a ST setting by key. scope='view' (default) or 'window' |
toggle_sidebar | Show or hide the sidebar |
set_layout | Set the window pane layout. Accepts a ST layout dict with cols, rows, cells |
set_status | Write a message to ST's status bar |
Build
| Tool | Description |
|---|---|
run_build | Trigger the current build system, or pass cmd/shell_cmd + working_dir for a custom command |
Terminus Integration
Terminus is a popular ST terminal package.
send_to_view is Terminus-aware: when targeting a Terminus tab it uses
terminus_send_string to type text into the terminal session rather than
inserting into a buffer.
| Tool | Description |
|---|---|
send_to_view | Send a string to any open tab by name. For Terminus tabs, types the text as if the user typed it. Include a trailing \n to execute a command |
Scripting
| Tool | Description |
|---|---|
eval_python | Execute arbitrary Python in ST's main thread. Locals available: sublime, window, view, print. Returns captured stdout in output |
Configuration
Port
Default is 9500. To change it, edit _PORT in sublime_mcp.py and BASE in mcp_server.py.
Timeout
The MCP server waits up to 10 seconds for each HTTP response. Edit TIMEOUT in
mcp_server.py if you need longer (e.g. for slow eval_python calls).
Security note
The HTTP server binds to 127.0.0.1 only and accepts any request without
authentication. Do not expose port 9500 to a network interface.
Requirements
- Sublime Text 4
- Python 3.10+ (for the MCP server process)
pip install mcp httpx- Terminus package (optional, required only for
send_to_viewon terminal tabs)
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