Claude Code

How do you add an MCP server to Claude Code?

Last verified: July 2026 · 2 min read

QUICK ANSWER

Add an MCP server to Claude Code by editing the local config file or using the slash command: '/mcp add <server-name> <command> [args...]'.

Using the Slash Command

Run the following interactive command inside the Claude Code prompt:

/mcp add postgres-mcp npx -y @modelcontextprotocol/server-postgres --conn postgresql://localhost/dev

Alternatively, write the configuration directly inside the claude-code.config.json under the mcpServers block.

Verified against: Claude Code CLI v0.2.5