WebMCP: The Protocol That's Changing the Game

An open protocol by Google and Microsoft that lets AI agents interact with any website. Here's how it works.

Salvador Morales ·

In February 2026, Google and Microsoft jointly published the 1.0 specification of WebMCP (Web Model Context Protocol). An open protocol that allows AI agents to interact with any website in a structured, programmatic way.

To put it simply: if a website implements WebMCP, any agent — ChatGPT, Claude, Gemini — can "talk" to it. Not by scraping HTML. Not by guessing. Using defined, documented tools.

How It Works

The protocol is based on a simple concept: each website publishes a manifest at /.well-known/mcp.json describing the available tools. A restaurant could expose:

  • getMenu() — returns the full menu with prices and allergens
  • checkAvailability(date, party_size) — checks availability
  • makeReservation() — completes a reservation

When a user tells ChatGPT "find a Japanese restaurant in Madrid for 4 people on Saturday," the agent can discover WebMCP-enabled restaurants, browse their menus, check availability, and make a reservation. All without the user opening a browser.

Why It's Different from Traditional APIs

APIs have been around for decades. The fundamental difference with WebMCP is that it's designed to be automatically discovered by AI agents. You don't need Swagger documentation, API keys, or point-to-point integrations.

The manifest is self-describing. An agent that has never interacted with your website can understand what tools you offer and how to use them, just like a human understands a form when they see it.

The Ecosystem in 2026

Just one month after its publication, WebMCP adoption is in its early stages. OpenAI has announced native support in ChatGPT by late Q1. Anthropic already supports it in Claude. Google is integrating it into Gemini.

For businesses, this means one thing: those who implement now will have months of advantage over their competition. And in an ecosystem where agents learn and prioritize based on past experiences, those months translate into years of compounded advantage.

Open Source by Design

WebMCP is an open protocol. It doesn't belong to any company. Anyone can implement it. At Agentikas, we publish our implementations as open source, because we believe the agentic web should be built on open standards, not on walled gardens.

WebMCP: The Protocol That's Changing the Game — Agentikas Labs