MCP Servers — Available Servers

Server catalog, configuration for Claude Code and Claude Desktop, registries

This page catalogs available MCP servers and their configuration. See also: MCP Overview, Building Servers.

Available MCP Servers

Official Reference Servers

Server	Package	What It Does
Filesystem	`@modelcontextprotocol/server-filesystem`	Secure file read/write/search
GitHub	`@modelcontextprotocol/server-github`	Repos, PRs, issues, search
Postgres	`@modelcontextprotocol/server-postgres`	Database queries, schema inspection
Git	`@modelcontextprotocol/server-git`	Repository operations
Fetch	`@modelcontextprotocol/server-fetch`	Web content retrieval
Memory	`@modelcontextprotocol/server-memory`	Knowledge graph persistence
Sequential Thinking	`@modelcontextprotocol/server-sequentialthinking`	Multi-step reasoning

Third-Party Servers

Server	What It Does
Brave Search	Web search with API
Playwright	Browser automation, screenshots, UI testing
Supabase	Database and auth operations
Docker	Container management
Figma	Design inspection, component data
Draw.io	Diagram creation
n8n	Workflow automation
Slack	Team messaging (remote MCP)
Notion	Documents and wikis (remote MCP)
Microsoft 365	Email, calendar, Office (remote MCP)
Google BigQuery	Data warehouse queries (remote MCP)

Configuration

Create .mcp.json in your project root:

{
  "mcpServers": {
    "filesystem": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "@modelcontextprotocol/server-filesystem", "/Users/me/projects"]
    },
    "github": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "@modelcontextprotocol/server-github"],
      "env": { "GITHUB_TOKEN": "ghp_your_token_here" }
    }
  }
}

Edit claude_desktop_config.json:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "filesystem": {
      "command": "npx",
      "args": ["-y", "@modelcontextprotocol/server-filesystem", "/Users/me/data"]
    },
    "postgres": {
      "command": "npx",
      "args": ["-y", "@modelcontextprotocol/server-postgres"],
      "env": { "DATABASE_URL": "postgres://user:pass@localhost/mydb" }
    }
  }
}

Some services offer hosted MCP endpoints:

{
  "mcpServers": {
    "slack": {
      "url": "https://mcp.slack.com/mcp"
    },
    "notion": {
      "url": "https://mcp.notion.com/mcp"
    },
    "microsoft365": {
      "url": "https://microsoft365.mcp.claude.com/mcp"
    }
  }
}

Managing MCPs in Claude Code

/mcp    # View, enable, disable, or authenticate MCP servers

Claude Code also supports OAuth authentication for remote MCP servers (Figma, Slack, Notion).

Configuration Rules

Rule	Why
Always use absolute paths	Working directory is undefined for spawned servers
Fully quit and restart Claude Desktop after config changes	System tray quit, not just window close
Pass env vars via `env` field	Only `USER`, `HOME`, `PATH` are inherited
Windows paths: use `/` or `\\` in JSON	Standard JSON escaping

Each active MCP adds tool definitions to your context window that consume tokens even when idle. Disable MCPs you are not using during routine coding sessions via /mcp.

MCP Registries

Registry	URL	Description
Official Registry	registry.modelcontextprotocol.io	Anthropic’s official server registry
Smithery	smithery.ai	Interactive playground for MCP servers
Glama	glama.ai/mcp/servers	Hosted MCP servers
GitHub Reference	github.com/modelcontextprotocol/servers	Official reference implementations

SDKs

Language	Package	Install
TypeScript	`@modelcontextprotocol/sdk`	`npm install @modelcontextprotocol/sdk zod@3`
Python	`mcp`	`uv add "mcp[cli]"` or `pip install "mcp[cli]"`
Java	Spring AI starters	Maven/Gradle
Kotlin	`io.modelcontextprotocol:kotlin-sdk`	Gradle
C#	`ModelContextProtocol`	`dotnet add package`
Go	Go module	`go get`
Swift	Swift Package Manager	SPM
Rust	`rmcp` crate	Cargo
Ruby	Ruby gem	`gem install`
PHP	Composer package	`composer require`

MCP Servers — Building Your Own