The 5 Essential Plugins & MCP Servers to Install Before You Write Any Code

Out of the box, an AI coding agent like Claude Code or Cursor is essentially a text generator with file read/write permissions. It has no live connection to your database, cannot verify its UI in a real browser, and often hallucinates API signatures.

The Model Context Protocol (MCP) gives your agent actual hands. Here are the five foundational MCP servers you should install before starting your next project.

1. PostgreSQL & SQLite MCP (Live Schema & Query Verification)

Instead of copying schema dumps into chat, the database MCP lets your agent inspect real tables, verify column types, check foreign keys, and dry-run SQL migrations.

{
  "mcpServers": {
    "postgres": {
      "command": "npx",
      "args": ["-y", "@modelcontextprotocol/server-postgres", "postgresql://user:pass@localhost:5432/mydb"]
    }
  }
}

2. Playwright Headless Browser MCP (Visual Verification)

Your agent can now start a headless browser, navigate to localhost:3000, click buttons, inspect console errors, and capture screenshots of rendered components to verify layout responsiveness.

3. GitHub & Git Context MCP (Pull Requests and Diffs)

Enables agents to review pull requests, read issue threads, search remote repositories, and verify commit histories without copy-pasting git logs.

4. Memory & Knowledge Vault MCP

Persists architecture decisions, coding preferences, and team rules across sessions so you never have to re-explain your styling conventions or TypeScript requirements.

5. Fetch & Clean Documentation MCP

Scrapes official documentation websites and returns sanitized Markdown, ensuring the agent uses current 2026 library APIs rather than outdated 2023 training data.