If you run a website in 2026, you have probably watched three different articles about MCP, A2A, and UCP scroll past in the last two weeks and wondered whether any of it changes what you should be doing this quarter. The short answer is yes, but probably less than the headlines suggest, and not in the direction the headlines point. The agentic protocol stack is real infrastructure that is now mainstream conversation, and most of the work the average website owner needs to do about it can be done in an afternoon. Three sources published the same underlying observation within roughly two weeks of each other. Backlinko released a six-protocol primer on MCP, A2A, NLWeb, WebMCP, ACP, and UCP, framing them as “what robots.txt and XML sitemaps were to 2005 Google.” Addy Osmani, Google Cloud’s Director of Engineering, published an Agentic Engine Optimization framework along with an open-source audit tool .…