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.
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 a one-click 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 one-click 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 one-click server install. 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.
When none of these is the answer
If nobody on the team is comfortable typing into a chat interface to run a business process, an MCP client is the wrong layer entirely. The CRM's own UI, or a scheduled automation that never involves a chat window, does the job with less to explain and nothing new to learn. MCP earns its place when a person wants to describe an outcome in plain language and have an agent carry out the steps, with the CRM's own approval queue still deciding what actually executes.
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.