Self-Hosted OAuth Authentication Library for MCP Servers

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Hey HN, The latest MCP spec ( https://modelcontextprotocol.io/specification/2025-06-18/bas... ) requires MCP Servers implement OAuth for authenticating users and authorizing access to tools and resources. I spent way too long wiring up OAuth to build a ChatGPT connector and decided to wrap the pain into a library: @mcpauth/auth. What it is: - Self-hosted OAuth server, built for Model-Context-Protocol - Single authenticateUser() hook, so you plug in whatever session logic you already have (NextAuth, Auth.js, plain cookies, JWT, you name it) - Adapters: Next.js and Express; stores: Drizzle or Prisma - ISC licensed, no calls home Quick start is ~5 min: npm i @mcpauth/auth, add two route handlers, set three env vars. Live demo: https://mcpauth-nextjs.vercel.app/ If you’re building an MCP server or any internal AI tool that needs proper OAuth, I’d love feedback — especially on edge cases or new functionality. Repo: https://github.com/mcpauth/mcpauth

Visit product View on Hacker NewsJun 26, 2025

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Product HuntOn track for Day 1 leaderboard · Strong signals: model, mcp, user · Missing: mac, agents, macos

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Indie HackersFits the IH revenue-focused audience · Missing: supports, reddit linkedin, podcasting

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AppSumoStrong fit for a featured deal · Strong signals: host, users, calls · Missing: plus, platform, intuitive

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Hacker NewsMay not resonate with HN audience · Strong signals: ide, io · Missing: https docs, excited, just released

41%41% predicted probability of success on Hacker News, based on ML models trained on real launch data.

nativeThis product was originally launched on this platform.

TrustMRRLess likely to generate early MRR · Strong signals: users, way · Missing: mobile apps, ios, personal

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Acquire.comPre-revenue stage for this audience · Missing: arr, mrr, revenue

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