--- title: "Securing MCP Servers with OAuth2: Ory Hydra + Claude Code + ChatGPT" url: https://daily.dev/posts/securing-mcp-servers-with-oauth2-ory-hydra-claude-code-chatgpt-q8dgkqusv source_url: https://dev.to/this-is-learning/securing-mcp-servers-with-oauth2-ory-hydra-claude-code-chatgpt-58hm type: article source: "This is Learning" published: 2026-01-30T15:18:35.867Z updated: 2026-01-30T15:19:00.130Z tags: ["nodejs", "authentication", "mcp", "fastify"] reading_time: 24 upvotes: 0 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Securing MCP Servers with OAuth2: Ory Hydra + Claude Code + ChatGPT **[This is Learning](https://daily.dev/sources/til)** · 24 min read · 0 upvotes · 0 comments ## Summary OAuth2 implementation for Model Context Protocol (MCP) servers using Ory Hydra and Kratos. Covers Dynamic Client Registration, token introspection, social login via GitHub, and compatibility testing across Claude (Desktop, CLI, Web) and ChatGPT clients. Documents five critical bugs encountered during implementation, including Claude's DCR validation failures and missing scope parameters, with working solutions including a DCR proxy pattern. Includes production security checklist and comparison of OAuth2 support across AI assistant platforms. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [MCP Authorization With Spring AI and OAuth2](https://daily.dev/posts/mcp-authorization-with-spring-ai-and-oauth2-j2n5fnuuu) · Baeldung · 12 upvotes · 0 comments - [Building the MotherDuck Remote MCP Server: A Journey Through Context Engineering and OAuth Proxies](https://daily.dev/posts/building-the-motherduck-remote-mcp-server-a-journey-through-context-engineering-and-oauth-proxies-l3ynlywfm) · MotherDuck · 3 upvotes · 0 comments --- Tags: [#nodejs](https://daily.dev/tags/nodejs), [#authentication](https://daily.dev/tags/authentication), [#mcp](https://daily.dev/tags/mcp), [#fastify](https://daily.dev/tags/fastify) [View this post on daily.dev](https://daily.dev/posts/securing-mcp-servers-with-oauth2-ory-hydra-claude-code-chatgpt-q8dgkqusv)