What is an MCP client, exactly?

The application a person types into, such as Claude Desktop or Cursor, that can call tools exposed by an MCP server. The client is the chat window; the server is the thing being controlled, such as a CRM. This page is about the client side.

Do I need a paid plan to use MCP?

Not usually. Claude Desktop and Cursor both support MCP on their standard subscriptions. ChatGPT's MCP support, including the ability to write data rather than just read it, is currently limited to Business, Enterprise and Edu workspaces under a developer mode setting, so a personal ChatGPT plan is not enough for that.

Can I connect more than one MCP client to the same CRM?

Yes, if the CRM issues separate tokens per client or per user. Each client gets its own scoped access, and the CRM's audit log should show which client made which call, so mixing Claude and Cursor against the same account is normal, not a conflict.

Does the client see everything the CRM can do?

Only what the token it holds is scoped to see. A well-built MCP server restricts each token to specific tools and records, the same access model as a human user, so the client is limited by the server's permissions regardless of how capable the client itself is.

Best MCP clients

The application matters less than whether it can call tools with a scoped token. Four that do, compared on how they connect and who can use them today.

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Pipeline with weighted forecast and stage breakdown

Claude Desktop or Claude Code wins for anyone building or operating an agent against a CRM's MCP server, because MCP is Anthropic's own protocol and the reference implementation lives there first. Cursor wins if the job is writing code with an MCP-connected tool open beside it.

The short answer

Claude Desktop and Claude Code connect to an MCP server through a local JSON config file and work on a standard subscription or API key, no separate MCP fee.
Cursor has native MCP support built into its editor, reachable through the UI, a config file, or an install link from the server's own docs.
ChatGPT's MCP support, including write actions rather than read-only lookups, is currently a beta feature restricted to Business, Enterprise and Edu workspaces under a developer mode toggle, not a general consumer feature.
Windsurf supports MCP through its Cascade AI system; Cline, Continue.dev, VS Code and Zed are also commonly cited as MCP-capable, though the depth of that support varies by client and changes quickly in this category.

How we compared these

MCP clients are evaluated on one question: can a person or team point this application at an MCP server and have it call tools reliably, including tools that write data, not only read it. We checked each vendor's own documentation for how the connection is configured, whether write actions are supported, and who is eligible to use that support, September 2026.

We did not test latency or model quality here, because that is a separate question from whether the client speaks MCP at all. A client that connects reliably to a slower model is still a better MCP client than one that does not connect.

MCP client comparison

Client	Vendor	MCP support	Who can use it	Cost
Claude Desktop / Claude Code	Anthropic	Native, local JSON config file; the reference implementation of MCP	Anyone with a Claude subscription or API access	Included with a Claude subscription or metered API use
Cursor	Anysphere	Native, configurable via UI, config file, or a deep link from a server's docs	Anyone with a Cursor account	Included with a Cursor plan
Windsurf	Windsurf	MCP support through its Cascade AI system	Anyone with a Windsurf account	Included with a Windsurf plan
ChatGPT	OpenAI	Beta; includes write actions, gated behind developer mode	Business, Enterprise and Edu workspace admins only, as of this check	Included with an eligible workspace plan
Cline / Continue.dev	Open source	Commonly cited as MCP-compatible; depth of support not independently verified for this table	Anyone running the extension	Free, open source

Figures and support claims checked on each vendor's own site and documentation, September 2026. Cline and Continue.dev support is reported widely but was not independently re-verified for this row; treat it as directionally correct rather than a confirmed spec.

The field, ranked

1. Claude Desktop / Claude Code

The reference client for the protocol Anthropic authored. Connects via a local config file, supports read and write tool calls, and is what most MCP server docs test against first. Best for: anyone building or operating an MCP-connected agent. Not for: a team that has standardized on a different assistant and does not want to add one.

2. Cursor

An IDE with MCP built in, reachable through the UI or a server install from a link. Strong when the person calling the CRM's tools is also writing code that day. Best for: developers who want CRM data or actions available inside the editor. Not for: a non-technical rep who does not want an IDE open.

3. Windsurf

MCP support through its Cascade system, aimed at the same developer audience as Cursor. Best for: teams already standardized on Windsurf as their editor. Not for: anyone outside a coding workflow.

4. ChatGPT

MCP support exists but is currently limited: write actions are beta and gated to Business, Enterprise and Edu workspace admins with developer mode on, not available on a personal plan. Best for: an enterprise team already on an eligible workspace plan. Not for: anyone expecting MCP on a standard ChatGPT Plus account.

5. Cline or Continue.dev

Open-source editor agents commonly described as MCP-capable. Free and extensible, but the exact scope of tool-call support varies by version and was not independently confirmed for every claim here. Best for: teams that want to self-host or modify the client. Not for: anyone who needs a vendor-supported, documented integration path.

How to choose

Choose Claude Desktop or Claude Code if you're building or running an MCP-connected agent. Choose Cursor or Windsurf if the person calling the CRM's tools also writes code that day. Choose ChatGPT if your team is already on an eligible Business or Enterprise workspace. Choose Cline or Continue.dev if you want to self-host or change the client. MCP earns its place when you want to describe an outcome in plain words and have an agent carry out the steps, with the CRM's own approval queue still deciding what runs.

Questions

What is an MCP client, exactly?: The application a person types into, such as Claude Desktop or Cursor, that can call tools exposed by an MCP server. The client is the chat window; the server is the thing being controlled, such as a CRM. This page is about the client side.
Do I need a paid plan to use MCP?: Not usually. Claude Desktop and Cursor both support MCP on their standard subscriptions. ChatGPT's MCP support, including the ability to write data rather than just read it, is currently limited to Business, Enterprise and Edu workspaces under a developer mode setting, so a personal ChatGPT plan is not enough for that.
Can I connect more than one MCP client to the same CRM?: Yes, if the CRM issues separate tokens per client or per user. Each client gets its own scoped access, and the CRM's audit log should show which client made which call, so mixing Claude and Cursor against the same account is normal, not a conflict.
Does the client see everything the CRM can do?: Only what the token it holds is scoped to see. A well-built MCP server restricts each token to specific tools and records, the same access model as a human user, so the client is limited by the server's permissions regardless of how capable the client itself is.