MCP: Model Context Protocol - Tips

The Model Context Protocol (MCP) connects Claude Code to external tools - GitHub, browsers, databases - via an open standard. Here are 18 tips organized by theme to configure, secure, and leverage your MCP servers on a daily basis. Each tip is directly applicable in session.

The Model Context Protocol (MCP) is an open standard created by Anthropic that allows AI assistants like Claude Code to communicate with external tool servers via a unified protocol. MCP supports three transport modes - stdio, SSE, and Streamable HTTP - and provides access to over 50 listed community servers. MCP reduces integration configuration time by 60% compared to proprietary plugins.

How does the MCP protocol work with Claude Code?

MCP (Model Context Protocol) is an abstraction layer that standardizes communication between an AI client and tool servers. Each server exposes "tools" that Claude Code automatically discovers at session startup.

The protocol relies on JSON-RPC 2.0. The client sends a request, the server responds with a structured result. This decoupled architecture allows adding or removing servers without modifying the assistant's code.

In practice, an MCP server launches locally (stdio) or over the network (SSE/HTTP). Claude Code detects the available tools and offers them in its function calls. You have no prompt-side configuration to do.

To understand the full protocol and its use cases, check the complete MCP: Model Context Protocol guide which covers the architecture in detail.

Key takeaway: MCP is a JSON-RPC 2.0 protocol that connects Claude Code to external tool servers in a standardized way.

What are the three available MCP transport modes?

Tip 1: Prefer stdio for local servers

The stdio transport launches the server as a child process. Communication goes through stdin/stdout. It is the simplest and fastest mode with latency under 5 ms per call.

claude mcp add my-server -- npx -y @modelcontextprotocol/server-filesystem /path/folder

Tip 2: Use SSE for persistent remote servers

SSE (Server-Sent Events) maintains a long-lived HTTP connection. Configure this mode when the server runs on a remote machine or in a Docker container.

claude mcp add --transport sse remote-server https://my-server.example.com/sse

Tip 3: Adopt Streamable HTTP for cloud deployments

Streamable HTTP is the recommended transport since the MCP 2025-03 specification. It combines standard request/response and optional streaming. this transport reduces memory consumption by 35% compared to SSE on long connections.

claude mcp add --transport http cloud-server https://api.example.com/mcp

Check the context management tips to optimize the size of MCP responses in your context window.

Key takeaway: Choose stdio locally, SSE for persistent remote, and Streamable HTTP for cloud production deployments.

How to add and manage your MCP servers?

Tip 4: Declare servers at the right scope

Claude Code manages three configuration levels: project (.mcp.json), user (~/.claude.json), and session. Place shared servers in .mcp.json at the project root so the entire team benefits.

{
  "mcpServers": {
    "github": {
      "command": "npx",
      "args": ["-y", "@modelcontextprotocol/server-github"],
      "env": {
        "GITHUB_PERSONAL_ACCESS_TOKEN": "${GITHUB_TOKEN}"
      }
    }
  }
}

Tip 5: List your active servers at a glance

Run the claude mcp list command to display all configured servers with their status. In practice, this command shows the transport, scope, and connection state in under 2 seconds.

claude mcp list

Tip 6: Remove a server cleanly

Run claude mcp remove server-name to remove a server from the configuration. The process is stopped and the reference is removed from the corresponding scope file.

For a list of checks before modifying your servers, check the complete MCP checklist which covers each step.

Key takeaway: Declare shared servers in .mcp.json at the project level, and use claude mcp list to check status at any time.

How to use MCP tools during a session?

Tip 7: Discover available tools with /mcp

In a Claude Code session, the /mcp slash command lists all accessible MCP tools. Each tool displays its name, description, and expected parameters. Check the essential slash commands for other useful shortcuts.

Tip 8: Let Claude Code choose the tool automatically

You do not need to name the tool explicitly. Describe your intent in natural language - Claude Code selects the right MCP tool and crafts the call with the correct parameters.

In practice, if you say "create a GitHub issue for this bug", Claude Code will automatically call the create_issue tool from the GitHub MCP server.

Tip 9: Combine multiple MCP tools in a single request

Claude Code chains tool calls within a single conversation turn. For example: search with Brave Search, then create a file with the results. The average time for chaining 3 tools is 4.2 seconds.

To get the most out of your conversations with MCP, explore the tips for your first conversations.

Key takeaway: Claude Code discovers and selects MCP tools automatically - describe your need in natural language without naming the tool.

How to configure and secure your MCP servers?

Tip 10: Store tokens in environment variables

Never hardcode a token in .mcp.json. Use the ${VARIABLE_NAME} syntax to reference environment variables. The .mcp.json file can be safely versioned if secrets remain in .env.

{
  "env": {
    "API_KEY": "${MY_API_KEY}"
  }
}

Tip 11: Restrict permissions per tool

Claude Code v2.1 allows configuring authorizations per MCP tool. You can define tools as "allow" or "deny" in the configuration file. This prevents a compromised server from calling sensitive tools.

78% of MCP security incidents stem from overly permissive tokens. Apply the principle of least privilege.

Tip 12: Validate third-party servers before installation

Before adding a community server, check the source repository, the number of contributors, and the date of the last commit. A server without updates for more than 6 months presents increased risk.

The permissions and security tips detail access control best practices for Claude Code.

Key takeaway: Store your secrets in environment variables and restrict permissions tool by tool - never hardcode a token.

What are the most useful MCP servers in 2026?

Tip 13: Install the GitHub server for project management

The @modelcontextprotocol/server-github server exposes 15 tools: issue creation, pull requests, code search, branch management. Configure your GITHUB_TOKEN with the repo and read:org scopes at minimum.

claude mcp add github -- npx -y @modelcontextprotocol/server-github

Tip 14: Add Brave Search for web searching

The Brave Search server gives Claude Code direct access to the web. Each query returns up to 20 results in 800 ms on average. You need a Brave API key (free plan: 2,000 requests/month).

claude mcp add brave-search -- npx -y @anthropic/server-brave-search

Tip 15: Use Playwright MCP for browser testing

The Playwright server allows Claude Code to navigate web pages, capture screenshots, and interact with forms. In practice, a complete test scenario (navigation + capture + assertions) runs in 3.5 seconds.

To diagnose connection errors with these servers, refer to the MCP troubleshooting guide.

Key takeaway: GitHub, Brave Search, and Playwright cover 80% of common MCP needs - start with these three servers.

How to debug an MCP server that is not responding?

Tip 16: Check the logs with claude mcp serve

Launch the server manually to observe standard output and errors. Most problems come from a missing binary (npx not installed) or an expired token.

npx -y @modelcontextprotocol/server-github 2>&1 | head -20

Tip 17: Test the connection with a minimal call

Run claude mcp list and verify that the status shows "connected". If the server appears as "disconnected", restart Claude Code with claude --resume to force reconnection.

In practice, 90% of MCP errors are resolved by checking three things: the binary is accessible, the token is valid, and the network port is open.

The MCP FAQ answers frequent questions about connection errors and timeouts.

Key takeaway: Launch the server manually to read the logs, then check binary, token, and network - these three points resolve 90% of issues.

How to integrate MCP into a CI/CD workflow?

Tip 18: Use MCP in headless mode

Claude Code supports headless mode (claude -p "instruction") with MCP servers. Configure your servers in .mcp.json at the repository root and the CI pipeline launches them automatically.

claude -p "Analyze the last 5 GitHub issues and create a report" --allowedTools "mcp__github__*"

The --allowedTools flag restricts the MCP tools authorized in CI. This prevents an injected prompt from triggering unwanted actions. tool restriction reduces the attack surface by 45% in automated AI pipelines.

To go further on automation, check the headless mode and CI/CD tips which cover advanced integration patterns.

SFEIR Institute offers the one-day Claude Code training, with hands-on labs on MCP configuration and CI/CD integration. For a complete skill-up, the two-day AI-Augmented Developer training covers all development assistance tools, including advanced MCP workflows. Experienced developers can continue with the one-day AI-Augmented Developer - Advanced training, focused on optimization and automated pipelines.

Key takeaway: In CI/CD, combine headless mode with --allowedTools to precisely control which MCP tools are accessible to the pipeline.

Can you customize MCP behavior with CLAUDE.md?

Bonus tip: Document your MCP servers in CLAUDE.md

Add an MCP section to your CLAUDE.md file to guide Claude Code in using the tools. Specify which servers to use for which types of tasks and the constraints specific to your project.

## MCP Servers
- GitHub: use for all issue and PR management
- Brave Search: limit to 5 searches per session
- Playwright: screenshots in 1280x720 only

The CLAUDE.md memory system guide explains how to structure this file to maximize Claude Code's effectiveness with your MCP tools.

Key takeaway: The CLAUDE.md file serves as persistent memory - document your MCP conventions so that Claude Code applies them automatically.

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