5 MCP Servers for Claude Code That Plug Five Different Gaps

Claude Code out of the box: a smart chat inside your editor. It writes code, explains errors, holds the context of your project. But on its own it doesn't open a browser, doesn't search for anything current online, and doesn't check whether the documentation for a library it just suggested is even up to date.

That's not fixed with a prompt. It's fixed with MCP servers. MCP stands for Model Context Protocol, an open protocol through which Claude Code connects to external tools: a browser, search, documentation, any website. I put together 5 servers that plug different weak spots in the agent, and I tested every one myself.

What an MCP server actually is

An MCP server is an add-on that gives Claude Code a specific capability: looking at a real page on a real site, searching the web, reading current documentation. Without it, the agent only works with what it remembers from training, and that could be outdated by the time a new version of a tool or library ships.

You install a server in Claude Code's settings, not in your project's code. No programming required: connect it once, and from then on the agent decides for itself when to call the right server during a conversation.

Playwright: opens the browser itself

Playwright MCP gives Claude Code the ability to actually open a page and see what's displayed there, instead of guessing from the code. This is how I check sites before handing off a project: I ask the agent to open the page, confirm it loads without errors, and verify that what's on screen is what should be there.

The difference in practice is significant. Without Playwright, the agent can say "done" even though the page doesn't actually load or shows the wrong thing. With it, the agent sees the result itself before reporting back.

Perplexity: fresh search with sources

Perplexity MCP connects real-time search and returns an answer along with links to its sources. Useful when a question touches something that happened after the model's training cutoff: a new tool version, breaking news, a current price.

You need your own Perplexity API key to connect it: the server doesn't work for free out of the box.

Context7: documentation without the guesswork

Context7 pulls current library documentation directly into the conversation, so Claude Code doesn't write code from memory. This is a frequent reason generated code fails to run on the first try: the model remembers an old version of an API, but the library has already changed.

With Context7, the agent checks the documentation for the version actually installed in your project, and guesses fewer method and parameter names.

Firecrawl: a website turned into clean data

Firecrawl turns any web page into clean text and structured data, stripped of markup and noise. Handy when you need to pull the content of a competitor's site, an article, or a catalog and keep working with that text.

Like Perplexity, it requires your own key and has its own limits on the free tier.

Sequential Thinking: a task broken into steps, not guesswork

Sequential Thinking is the official reference server from the Model Context Protocol repository. It doesn't reach into any external sources; instead it changes how the agent breaks down a large task: not one jump to the answer, but step by step, checking each one before moving to the next.

Useful on tasks where it's easy to miss a detail: refactoring several files at once, debugging a non-trivial bug, planning a feature made of multiple parts.

What works right away, and what needs a key

| Server | What it does | Needs your own key |

|---|---|---|

| Playwright | Opens the browser, views the page | No |

| Perplexity | Fresh search with sources | Yes |

| Context7 | Current library documentation | No |

| Firecrawl | Website → clean text and data | Yes |

| Sequential Thinking | Task broken into steps | No |

Three of the five work right after you connect them. Perplexity and Firecrawl require signing up separately and adding a key in the settings.

Who needs this

People who run their own projects through Claude Code without a staff developer nearby, and who keep hitting the same wall: the agent can't see the real result of its own work, suggests outdated code, or misses part of the task. Three of the servers are free and require no programming: just a connection in the settings.

There's one thing this combination doesn't solve: deciding what task to give the agent in the first place, and what counts as a finished result, is still on you. MCP servers expand what the agent is capable of, not what it should do.

Bottom line

Five servers plug five different gaps: the browser, search, documentation, reading websites, and structured thinking. None of them requires writing code: just connecting them through Claude Code's settings.

I wrote about the other ready-made skills I install in Claude Code in the article "5 Claude Code Skills for Animation". More tool breakdowns and combinations for vibe coding in the "Growing with AI" channel. If you need help building a system for your own project, you can book a free consultation.