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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 22 Oct 2026 20:37 UTC.

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33> Which MCP clients implement which official extensions
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5This 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).
5This matrix shows which MCP clients support each [official extension](/extensions/overview.md). 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.md#negotiation).
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77> [!NOTE]
88>
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1313| Extension | Identifier | Description |
1414| - | - | - |
15| [MCP Apps](/extensions/apps/overview) | `io.modelcontextprotocol/ui` | Interactive HTML interfaces rendered inline in the conversation |
16| [OAuth Client Credentials](/extensions/auth/oauth-client-credentials) | `io.modelcontextprotocol/oauth-client-credentials` | Machine-to-machine auth without interactive user login |
17| [Enterprise-Managed Authorization](/extensions/auth/enterprise-managed-authorization) | `io.modelcontextprotocol/enterprise-managed-authorization` | Centralized access control via enterprise IdP |
18| [Skills over MCP](/extensions/skills/overview) | `io.modelcontextprotocol/skills` | Discover skills and read their instructions and supporting files |
15| [MCP Apps](/extensions/apps/overview.md) | `io.modelcontextprotocol/ui` | Interactive HTML interfaces rendered inline in the conversation |
16| [OAuth Client Credentials](/extensions/auth/oauth-client-credentials.md) | `io.modelcontextprotocol/oauth-client-credentials` | Machine-to-machine auth without interactive user login |
17| [Enterprise-Managed Authorization](/extensions/auth/enterprise-managed-authorization.md) | `io.modelcontextprotocol/enterprise-managed-authorization` | Centralized access control via enterprise IdP |
18| [Skills over MCP](/extensions/skills/overview.md) | `io.modelcontextprotocol/skills` | Discover skills and read their instructions and supporting files |
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2020## Support matrix
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22| 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) |
22| Client | [MCP Apps](/extensions/apps/overview.md) | [OAuth Client Credentials](/extensions/auth/oauth-client-credentials.md) | [Enterprise Auth](/extensions/auth/enterprise-managed-authorization.md) | [Skills](/extensions/skills/overview.md) |
2323| - | :-: | :-: | :-: | :-: |
2424| [Claude (web)](https://claude.ai) | | | | |
2525| [Claude Desktop](https://claude.ai/download) | | | | |
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49493. Implement the extension's protocol requirements
50504. Submit a pull request to update this matrix
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52See [Extensions Overview](/extensions/overview#negotiation) for details on the capability negotiation mechanism.
52See [Extensions Overview](/extensions/overview.md#negotiation) for details on the capability negotiation mechanism.
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