# MCP 101

Canonical: https://thelazyweb.com/101/mcp/
Updated: 2026-09-20
Curator: Ali Abouelatta (https://thelazyweb.com/authors/ali-abouelatta/)

The protocol's original motivation, current architecture, secure transport and the maintainer decisions that turned a connector format into shared infrastructure.

**TL;DR:** MCP standardizes how AI hosts connect to tools, resources and prompts. Read the architecture and transport specs first; then study authorization, client behavior and governance before copying a demo server into production.

## Understand the protocol

These sources establish MCP's original problem and its current host-client-server model before implementation details obscure the point.

### [Introducing the Model Context Protocol](https://www.anthropic.com/news/model-context-protocol)

Authority: [Alex Albert](https://thelazyweb.com/authors/alex-albert/)

**TL;DR:** MCP was introduced as an open standard that replaces one-off data integrations with a common connection between AI applications and external systems.

**What you'll read:** The launch thesis, early architecture, initial SDKs and the ecosystem problem Anthropic intended the protocol to solve.

### [MCP architecture](https://modelcontextprotocol.io/specification/2026-07-28/architecture)

Authority: [David Soria Parra](https://thelazyweb.com/authors/david-soria-parra/)

**TL;DR:** A host owns user experience and security boundaries, clients maintain one server connection each, and servers expose focused context and capabilities.

**What you'll read:** The authoritative host-client-server roles, isolation boundaries,

[MCP 101](<https://www.thelazyweb.com/101/mcp/>)

Source observed: 2026-09-20T21:38:42.153Z. Last checked: 2026-10-08T02:04:48.973+00:00.

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