Authorization Extensions changedextensions/auth/overview
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55The [ext-auth repository](https://github.com/modelcontextprotocol/ext-auth) contains official MCP extensions that add authorization capabilities beyond the core MCP specification. These extensions address specific real-world scenarios where the standard OAuth 2.0 authorization code flow isn't the right fit.
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7<Card title="modelcontextprotocol/ext-auth" icon="github" href="https://github.com/modelcontextprotocol/ext-auth">
8 Source code, specifications, and reference implementations for MCP
9 authorization extensions.
10</Card>
7> **[modelcontextprotocol/ext-auth](https://github.com/modelcontextprotocol/ext-auth)**
8>
9> Source code, specifications, and reference implementations for MCP
10> authorization extensions.
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1212## Why authorization extensions?
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2323## Available extensions
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25<CardGroup cols={2}>
26 <Card title="OAuth Client Credentials" icon="robot" href="/extensions/auth/oauth-client-credentials">
27 Machine-to-machine authentication using the OAuth 2.0 client credentials
28 flow. No user interaction required.
29 </Card>
25> **[OAuth Client Credentials](/extensions/auth/oauth-client-credentials)**
26>
27> Machine-to-machine authentication using the OAuth 2.0 client credentials
28> flow. No user interaction required.
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31 <Card title="Enterprise-Managed Authorization" icon="building" href="/extensions/auth/enterprise-managed-authorization">
32 Centralized access control via enterprise identity providers. Employees
33 access MCP servers through their organization's IdP.
34 </Card>
35</CardGroup>
30> **[Enterprise-Managed Authorization](/extensions/auth/enterprise-managed-authorization)**
31>
32> Centralized access control via enterprise identity providers. Employees
33> access MCP servers through their organization's IdP.
3634
3735## Choosing the right extension
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