---
id: "2024-11-25-model-context-protocol"
url: "https://postcutoff.com/e/2024-11-25-model-context-protocol/"
as_of: "2026-11-13T13:49:00+01:00"
date: "2024-11-25"
date_precision: day
category: agents
importance: 5
confidence: high
status: [Confirmed]
sources: 3
editor: human editor
human_review: null
version: "2026-10-04"
---

As of: 2026-11-13 13:49 CET.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/e/2024-11-25-model-context-protocol/

# Anthropic open-sources the Model Context Protocol (MCP)

Anthropic introduced MCP, an open standard for connecting AI assistants to data sources and tools; within a year it was adopted by OpenAI, Google, Microsoft and most AI developer tools, becoming the de facto agent–tool protocol.

## Key facts
- Announced 25 November 2024 with SDKs and reference servers
- Client–server protocol exposing tools, resources and prompts
- OpenAI announced MCP support in March 2025; Google, Microsoft and others followed
- Donated to the Linux Foundation's Agentic AI Foundation on 9 December 2025

## What happened

Anthropic open-sourced a specification and SDKs so any application could expose context and actions to any LLM client.

## Why it matters

Solved the N×M integration problem for agents and became core infrastructure of the agentic AI ecosystem.

## Your AI and this story

- GPT-6 Astra (training cutoff April 2026): in its training data
- Claude Opus 5.5 (training cutoff June 2026): in its training data
- Gemini 4 Hydrogen (training cutoff March 2026): in its training data
- Grok 4.7 (training cutoff May 2026): in its training data

## Sources

1. [Introducing the Model Context Protocol (Anthropic)](https://www.anthropic.com/news/model-context-protocol) (anthropic.com, official)
2. [Model Context Protocol documentation](https://modelcontextprotocol.io/) (modelcontextprotocol.io, docs)
3. [modelcontextprotocol (GitHub)](https://github.com/modelcontextprotocol) (github.com, code)

## Changes

- 2026-09-29 (filed): Created

## Related

- 2025-12-09: [MCP donated to the Linux Foundation's new Agentic AI Foundation](https://postcutoff.com/e/2025-12-09-mcp-agentic-ai-foundation/index.md)
- 2024-10-22: [Anthropic releases computer use for Claude 3.5 Sonnet](https://postcutoff.com/e/2024-10-22-claude-computer-use/index.md)