swc-mcp VS Code / Cursor extension

Registers the bundled swc-mcp stdio MCP server and provides a tabbed Setup sidebar for secure-store configuration, per-integration MCP tool policy, and mcp.json helpers.

Requirements

VS Code 1.102+ or Cursor with extension support
Windows or macOS for OS secure-store configuration (same as the server CLI)
Node.js >= 20.11 on PATH (used to launch the bundled server)

Build

From the swc-mcp repository root:

npm install
npm run build:extension

This produces:

extension/out/extension.js — extension host bundle
extension/resources/server/index.js (+ any index*.js ncc chunks) copied from dist/

Package a VSIX:

npm run package:extension

Usage

Install the extension (VSIX or F5 from extension/).
Open the swc-mcp activity bar container → Setup webview.
Use the tabs:
- General — server metadata, setup checklist, status, mcp.json example, export portable server, reset all auth
- GitLab / Figma / Jira / Confluence / Slack — in-webview credentials (verify on save), reset, and MCP tool toggles for that integration
Credentials are stored in the OS secure store (swc-mcp/<account>), not in mcp.json. Leave a secret field blank on save to keep the existing token.
MCP tools are registered automatically:
- VS Code: vscode.lm.registerMcpServerDefinitionProvider
- Cursor: vscode.cursor.mcp.registerServer when available
Export portable server copies the full portable bundle (index.js and any index*.js chunks) to a folder of your choice and offers mcp.json copy/merge actions for Cursor, VS Code workspace config, or external clients.

Commands

Command	Description
`swc-mcp: Open Setup`	Focus the Setup webview
`swc-mcp: Show Status`	Open Setup on the General tab (status section)
`swc-mcp: Export Portable Server`	Copy bundled server + mcp.json helpers
`swc-mcp: Copy mcp.json Example`	Copy snippet for the bundled binary

Manual test matrix

Check	Steps
Tab navigation	Switch General ↔ integrations; tab badges update without full reload flicker
Server save	General → edit name/version/log level → Save server
Provider save	Integration tab → valid credentials → Save & verify; invalid token shows inline error
Token reuse	Save once, clear token field, save again — verification still succeeds
Tool toggle	Figma tab → filter tools → toggle one checkbox; only that row and badge update
Reset provider	Integration → Reset → confirm → form shows not configured
Reset all auth	General → Reset all auth → confirm → checklist shows missing providers
Export / mcp.json	General → Export portable; Copy mcp.json example
Show status command	`swc-mcp: Show Status` opens General with status block
Linux read-only	Unsupported notice; export and mcp.json actions still enabled; forms disabled

Host	OS	Check
VS Code	Windows	Extension activates; MCP server appears; Figma configure + tool toggle
Cursor	Windows	`cursor.mcp.registerServer` registers server; tabbed Setup flows
VS Code	macOS	Secure store read/write; status matches CLI
Either	Linux	Unsupported notice; read-only General actions still available

See the swc-mcp server README in the repository root for provider token scopes and security notes.

SWC-Secure-mcp

Dzmitry Bulauka