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Extension Support Matrix changedextensions/client-matrix

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Upstream edited this page at 28 Sep 2026 21:56 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 20 Oct 2026 20:07 UTC.

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33> Which MCP clients implement which official extensions
44 
5export const CHECK = () => <span className="flex justify-center">
6 <Icon icon="check" iconType="solid" size={18} className="text-green-500" />
7 </span>;
8 
95This matrix shows which MCP clients support each [official extension](/extensions/overview). Extensions are always opt-in: a client only uses an extension if both client and server declare support in the `extensions` field of their [capabilities](/extensions/overview#negotiation).
106 
11<Note>
12 This list is maintained by the community. If you notice any inaccuracies or would like to add or update information, please [submit a pull request](https://github.com/modelcontextprotocol/modelcontextprotocol/pulls).
13</Note>
7> [!NOTE]
8>
9> This list is maintained by the community. If you notice any inaccuracies or would like to add or update information, please [submit a pull request](https://github.com/modelcontextprotocol/modelcontextprotocol/pulls).
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1511## Extension overview
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2622| Client | [MCP Apps](/extensions/apps/overview) | [OAuth Client Credentials](/extensions/auth/oauth-client-credentials) | [Enterprise Auth](/extensions/auth/enterprise-managed-authorization) | [Skills](/extensions/skills/overview) |
2723| - | :-: | :-: | :-: | :-: |
28| [Claude (web)](https://claude.ai) | <CHECK /> | | | |
29| [Claude Desktop](https://claude.ai/download) | <CHECK /> | | | |
30| [VS Code GitHub Copilot](https://code.visualstudio.com/) | <CHECK /> | | | |
31| [Microsoft 365 Copilot](https://www.microsoft.com/microsoft-365-copilot) | <CHECK /> | | | |
32| [Goose](https://block.github.io/goose/) | <CHECK /> | | | |
33| [Postman](https://postman.com) | <CHECK /> | | | |
34| [MCPJam](https://www.mcpjam.com/) | <CHECK /> | | | |
35| [ChatGPT](https://chatgpt.com/) | <CHECK /> | | | [Partial](https://developers.openai.com/plugins/build/mcp-server#import-skills-from-the-mcp-server) |
36| [Cursor](https://cursor.com/) | <CHECK /> | | | |
37| [Archestra.AI](https://www.archestra.ai/) | <CHECK /> | | <CHECK /> | |
38| [PostHog Code](https://posthog.com/code/) | <CHECK /> | | | |
24| [Claude (web)](https://claude.ai) | | | | |
25| [Claude Desktop](https://claude.ai/download) | | | | |
26| [VS Code GitHub Copilot](https://code.visualstudio.com/) | | | | |
27| [Microsoft 365 Copilot](https://www.microsoft.com/microsoft-365-copilot) | | | | |
28| [Goose](https://block.github.io/goose/) | | | | |
29| [Postman](https://postman.com) | | | | |
30| [MCPJam](https://www.mcpjam.com/) | | | | |
31| [ChatGPT](https://chatgpt.com/) | | | | [Partial](https://developers.openai.com/plugins/build/mcp-server#import-skills-from-the-mcp-server) |
32| [Cursor](https://cursor.com/) | | | | |
33| [Archestra.AI](https://www.archestra.ai/) | | | | |
34| [PostHog Code](https://posthog.com/code/) | | | | |
3935| [fast-agent](https://github.com/evalstate/fast-agent) | | | | [Partial](https://github.com/evalstate/fast-agent/blob/main/docs/docs/mcp/skills-over-mcp.md) |
4036| [MCP Inspector](https://github.com/modelcontextprotocol/inspector) | | | | [Partial](https://github.com/modelcontextprotocol/inspector/blob/main/clients/cli/README.md#skill-verification---verify) |
41| [mcpc MCP CLI](https://github.com/apify/mcpc) | | <CHECK /> | <CHECK /> | <CHECK /> |
37| [mcpc MCP CLI](https://github.com/apify/mcpc) | | | | |
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43<Note>
44 Auth extension support (OAuth Client Credentials and Enterprise-Managed Authorization) is tracked separately from the core MCP authorization features (DCR, CIMD). Check each extension's specification and the [ext-auth repository](https://github.com/modelcontextprotocol/ext-auth) for the latest implementation status.
45</Note>
39> [!NOTE]
40>
41> Auth extension support (OAuth Client Credentials and Enterprise-Managed Authorization) is tracked separately from the core MCP authorization features (DCR, CIMD). Check each extension's specification and the [ext-auth repository](https://github.com/modelcontextprotocol/ext-auth) for the latest implementation status.
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4743## Adding extension support to your client
4844 
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