Architecture

System design, infrastructure patterns, and technical architecture.

4 articles

December 2025

Diagram showing ChatGPT calling the CaptainDNS MCP server and rendering an email authentication audit widget

December 7, 2025

Integrate a ChatGPT widget for email authentication auditing with CaptainDNS

Detailed postmortem on wiring a ChatGPT Apps SDK UI component to visualize the CaptainDNS SPF/DKIM/DMARC/BIMI audit.

Architecture diagram showing Auth0, the CaptainDNS MCP server, the backend API and MCP clients

December 4, 2025

Auth0 + MCP CaptainDNS: our full postmortem

How we connected Auth0 to our CaptainDNS MCP server: dedicated audiences, PRM, Resource Parameter Compatibility Profile, JWT validation, identity propagation into profiles and api_requests, with optional auth today and protected tools ready for later.

November 2025

Diagram of the CaptainDNS MCP architecture between ChatGPT, the MCP server, and the backend API

November 27, 2025

Behind the scenes of the CaptainDNS MCP

How we wired CaptainDNS to AIs through MCP: architecture, HTTP+SSE transport, JSON-RPC, 424 errors, timeouts, and what we learned along the way.

Diagram showing an AI host talking to CaptainDNS through a standardized MCP connector

November 21, 2025

An MCP for CaptainDNS?

Before plugging CaptainDNS into AIs, you need to understand what the Model Context Protocol (MCP) is and what it really enables. A short MCP ABC, then first steps for CaptainDNS.