Updated 2026-10-18
What is an MCP server?
An MCP server is a small service that gives an AI app a set of tools and data through the Model Context Protocol, an open standard for connecting AI applications to external systems. Any MCP-compatible client, such as Claude, ChatGPT, Cursor or VS Code, can discover those tools and call them, the way a USB-C port works with many devices.
What is an MCP server, in simple terms?
It's a plug that lets an AI assistant use another app's tools and data through one standard protocol. The MCP docs compare MCP to a USB-C port for AI applications. (MCP docs)
How does an MCP server work?
Clients, servers and tools
The client (Claude, ChatGPT, Cursor, VS Code, Codex) connects to a server, lists its tools, and calls them when a task needs them.
Local (stdio) vs remote (HTTP) servers
A local server runs as a process on your machine; a remote server runs at a URL. See remote MCP servers.
Sign-in with OAuth
Remote servers usually sign in with OAuth. Claude Code uses /mcp, Codex uses codex mcp login, and Cursor prompts when you add the server.
How is an MCP server different from an API?
An API is built for programmers who write code against it. An MCP server wraps actions as named, described tools that an AI client can discover and call itself, often on top of an existing API.
How does MCP compare with skills, A2A, CLIs and RAG?
| What it is | Use it for | |
|---|---|---|
| MCP server | live tools and data over a standard protocol | reaching external systems |
| Agent Skill | a folder with a SKILL.md of instructions and scripts | know-how loaded on demand |
| A2A | agent-to-agent protocol | delegating to other agents |
| CLI | a command-line program | when the agent has a shell |
| RAG | retrieving documents into context | static knowledge |
More: Agent Skills explained, MCP vs A2A.
What is an MCP client, connector or gateway?
The client is the AI app that connects to servers. "Connector" is the name some apps, such as Claude and ChatGPT, use for a remote MCP server added in settings. A gateway sits in front of several servers to centralize auth and policy.
Where can you find MCP servers?
The official MCP Registry
The official registry publishes metadata for publicly accessible servers and is meant to be consumed by downstream aggregators. (Registry)
Ranked directories
DartzDabz adds daily live checks and rankings on top: best MCP servers and the directory.
Which MCP servers should you try first?
| Score | Tool | Type | Host |
|---|---|---|---|
| Official | GitHub MCP Server (official) GitHub's official MCP server. Remote endpoint used in Claude Code's docs with a GitHub personal access token. | MCP · http | api.githubcopilot.com |
| Official | Notion MCP (official) Official Notion MCP server for connecting MCP clients to your Notion workspace. | MCP · http | mcp.notion.com |
| Official | Atlassian Rovo MCP Server (official) Official remote MCP server for Atlassian: connect Jira, Confluence, Jira Service Management, Bitbucket and Com | MCP · http | mcp.atlassian.com |
| Official | Linear MCP (official) Linear's official remote MCP server for issues, projects and comments. | MCP · http | mcp.linear.app |
| Official | Playwright MCP (official, Microsoft) MCP server that provides browser automation using Playwright, letting LLMs interact with web pages through str | MCP · stdio | github.com |
| Official | Stripe MCP (official) Stripe's official remote MCP server for working with the Stripe API and docs. | MCP · http | mcp.stripe.com |
| Official | Sentry MCP (official) Sentry's official MCP server for accessing Sentry issues and errors from AI tools. | MCP · http | mcp.sentry.dev |
| Official | Figma MCP server (official) Figma's official remote MCP server for bringing Figma design context into AI coding tools. | MCP · http | mcp.figma.com |
| Official | Firecrawl MCP Server (official) Official Firecrawl MCP server that adds web scraping and search to Cursor, Claude and other LLM clients. | MCP · http | mcp.firecrawl.dev |
Is it safe to connect an MCP server?
Only connect servers you trust and give them the narrowest access. Claude Code's docs warn that servers fetching external content can expose you to prompt injection. Cursor asks for approval before running MCP tools by default, and Codex lets you allow-list tools and set approval modes.
What else do people ask?
What is an MCP server in simple terms?
It's a plug that lets an AI assistant use another app's tools and data through one standard protocol. Once connected, the assistant can, for example, read issues, query a database or search docs directly instead of working from what you paste.
What is the difference between an MCP server and an API?
An API is built for programmers, who write code to call it. An MCP server wraps tools with names and descriptions that an AI client can discover and call by itself, often on top of an existing API.
What is an MCP client?
The MCP client is the AI app that connects to servers and calls their tools, such as Claude Code, Cursor, Codex or ChatGPT. One client can connect to many servers at once.
What is an MCP connector?
Connector is the name some apps, such as Claude and ChatGPT, give to a remote MCP server you connect through their settings. Underneath it is still an MCP server, usually with OAuth sign-in.
Local vs remote MCP server: what's the difference?
A local (stdio) server runs as a process on your computer; a remote server runs at a URL and usually signs in with OAuth. Remote servers need nothing installed and work across clients.
Where can I find MCP servers?
The official MCP Registry publishes metadata for public servers, and directories like DartzDabz add rankings, live checks and categories on top. Start with the best-MCP list for your client.
Are MCP servers safe?
They can be, if you only connect servers you trust and limit the access you grant. Client docs warn that servers fetching outside content can expose you to prompt injection, so review permissions and use scoped keys.
What should you read next on DartzDabz?
- best MCP servers ranked daily
- best MCP servers for Claude Code
- browse MCP servers in the directory
- browse the full agent tool directory
- remote MCP servers trend
- what is x402 (paid tools for agents)
- what AI agents can do
- copy a real agent setup
- Submit your agent build
- Get tomorrow's movers in DartzDabz Daily
Sources
- modelcontextprotocol.io/docs/getting-started/intro
- modelcontextprotocol.io/registry/about
- code.claude.com/docs/en/mcp
- cursor.com/docs/context/mcp
- developers.openai.com/codex/mcp
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