DEV Community: Harish Gaggar The latest articles on DEV Community by Harish Gaggar (@harish_gaggar_bbe760b3d91). https://dev.to/harish_gaggar_bbe760b3d91 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4160593%2Fccef2376-1505-4671-9fc5-510570247dfc.png DEV Community: Harish Gaggar https://dev.to/harish_gaggar_bbe760b3d91 en Building an OAuth-Secured MCP Gateway for Enterprise Agents Harish Gaggar Sat, 03 Oct 2026 22:32:29 +0000 https://dev.to/harish_gaggar_bbe760b3d91/building-an-oauth-secured-mcp-gateway-for-enterprise-agents-nmp https://dev.to/harish_gaggar_bbe760b3d91/building-an-oauth-secured-mcp-gateway-for-enterprise-agents-nmp <p>Reference stack for teams standing up an MCP gateway and MCP servers from scratch, especially useful behind air-gapped/restricted networks where typical SaaS patterns don't apply.</p> <p>It includes a working gateway, example MCP servers (Artifactory, GitHub, Google Drive), and a governed LangGraph agent, all runnable locally via Docker. The design leans on a few principles: per-call OAuth, continuous audit logging, PII/secret scrubbing before anything reaches the LLM, eval/tracking per query, persistent memory across restarts, and context trimming to control token spend.</p> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Farticles%2Fw1kfxqrectej9apnstkt.png" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Farticles%2Fw1kfxqrectej9apnstkt.png" alt=" " width="800" height="321"></a></p> <p>It's meant to be forked and adapted rather than used as a hosted product. Would love feedback from anyone building similar internal agent infrastructure, especially on the OAuth flow and the safety-kit approach to PII stripping.</p> <p>Repo: <a href="https://github.com/harish-gaggar/mcp-server-gateway" rel="noopener noreferrer">https://github.com/harish-gaggar/mcp-server-gateway</a></p> <p>If you find it useful, a star on the repo helps others discover it too. Much appreciated!</p> mcp opensource langgraph docker