---
title: "MCP, WebMCP and A2A in plain words | Am I Ready for Agents?"
description: "MCP, WebMCP and A2A in one paragraph each, for business leaders: what each is for, who already offers one and when it matters."
canonical: https://amireadyforagents.com/briefings/mcp-webmcp-and-a2a-explained
site: "Am I Ready for Agents?"
last_updated: 2026-11-04
section: "Guides"
---

# MCP, WebMCP and A2A in plain words | Am I Ready for Agents?

> MCP, WebMCP and A2A in one paragraph each, for business leaders: what each is for, who already offers one and when it matters.

Source: https://amireadyforagents.com/briefings/mcp-webmcp-and-a2a-explained
Site: Am I Ready for Agents?
Last reviewed: 2026-11-04

# MCP, WebMCP and A2A explained for business leaders

## In short

Three protocol names your web team may use. MCP offers an agent a set of named actions it can call. WebMCP is a proposal that lets a web page list its actions for an agent in the browser. A2A lets one organisation's agent hand a task to another's. Most businesses need none of them first.

## MCP, the Model Context Protocol

An open standard for offering an AI agent a set of named actions it can call, such as search providers, check stock or book an appointment. A business runs an MCP server that describes what agents may do.

-   28 Oct 2026
    
    Zocdoc gives registered agents an MCP server or REST API to search providers, check insurance and book.
    
    [Zocdoc for Agents (markdown)](https://www.zocdoc.com/business/welcome-agents.md), read 4 Nov 2026
    
-   19 Oct 2026
    
    The AgentReady spec makes an MCP server or a CLI a MUST when agents should complete a task, not only read (AR-ACT-10, October 2026).
    
    [AgentReady.org guide](https://agentready.org/?utm_source=amireadyforagents.com&utm_medium=referral&utm_campaign=briefing), read 4 Nov 2026
    

## WebMCP

A proposal that lets a web page tell an agent in the browser which actions it offers, as named tools, instead of the agent guessing at buttons. It matters most where the main task already runs through a form.

-   Read 4 Nov 2026
    
    Cloudflare shows a page registering an add-todo tool with document.modelContext.registerTool (6 Aug 2026).
    
    [Cloudflare: the agentic internet, WebMCP example (6 Aug 2026)](https://blog.cloudflare.com/the-agentic-internet/), read 4 Nov 2026
    

## A2A, agent to agent

A protocol for one organisation's agent to find another agent and hand it a task. Where MCP connects an agent to tools, A2A connects agents to each other. It becomes relevant if you work with other companies' agents, for example as a supplier. This site holds no dated source on its adoption, so it says no more.

## Which one matters to you

-   If your main task runs through a web form, watch WebMCP.
-   If other software already uses your services, such as bookings through partners or an order interface, MCP is the likeliest fit.
-   If neither applies, readable pages and standard forms matter more than any protocol.

The decision is not which protocol but which task you want agents to finish. See [whether to publish an API or an MCP server](https://amireadyforagents.com/decisions/publish-api-or-mcp). In the crawl, very few sites publish any act surface at all, so you would be early (see the [scorecards](https://amireadyforagents.com/scorecards)).

## Related

-   [Whether to publish an API or an MCP server](https://amireadyforagents.com/decisions/publish-api-or-mcp)Name the task before the technology.
-   [Ask your web team](https://amireadyforagents.com/ask-your-web-team)The sentences to send, grouped by area.

## Sources

1.  [Zocdoc for Agents (markdown)](https://www.zocdoc.com/business/welcome-agents.md) (zocdoc.com/business/welcome-agents.md), read 4 Nov 2026.
2.  [AgentReady.org guide](https://agentready.org/?utm_source=amireadyforagents.com&utm_medium=referral&utm_campaign=briefing) (agentready.org), read 4 Nov 2026.
3.  [Cloudflare: the agentic internet, WebMCP example (6 Aug 2026)](https://blog.cloudflare.com/the-agentic-internet/) (blog.cloudflare.com/the-agentic-internet), read 4 Nov 2026.

Last reviewed 4 November 2026

Reviewed 4 November 2026. [3 sources](#sources), each with the day it was read.