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Guide Walks Through OAuth 2.1 Authorization for Remote MCP Servers

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A DEV Community tutorial explains how AI clients use OAuth 2.1 to access protected remote MCP servers. It uses a hypothetical company database exposing customer tools as its running example. The article separates the roles of the MCP client, the MCP server acting as resource server, and the separate authorization server that signs users in and issues tokens. It then steps through the full flow, from an initial unauthenticated request and metadata discovery to PKCE-protected sign-in and token-bound retries. The guide notes that OAuth is optional for local or public MCP deployments and is aimed at developers building secure remote integrations.

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