{"schema":"postcutoff/event@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/e/2024-11-25-model-context-protocol/","md":"https://postcutoff.com/e/2024-11-25-model-context-protocol/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"human editor","policy":"https://postcutoff.com/about/"},"license":null,"id":"2024-11-25-model-context-protocol","date":"2024-11-25","date_precision":"day","short_title":"Anthropic open-sources the Model Context Protocol (MCP)","deck":null,"takeaway":"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.","category":"agents","category_label":"Agents","importance":5,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":[{"n":1,"title":"Introducing the Model Context Protocol (Anthropic)","url":"https://www.anthropic.com/news/model-context-protocol","type":"official","group":"primary","domain":"anthropic.com"},{"n":2,"title":"Model Context Protocol documentation","url":"https://modelcontextprotocol.io/","type":"docs","group":"primary","domain":"modelcontextprotocol.io"},{"n":3,"title":"modelcontextprotocol (GitHub)","url":"https://github.com/modelcontextprotocol","type":"code","group":"primary","domain":"github.com"}],"official":3,"filed":"2026-09-29","updated":"2026-09-29","orgs":["Anthropic"],"title":"Anthropic open-sources the Model Context Protocol (MCP)","summary":"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"],"key_numbers":[],"tags":["agents","protocol","open-source","tools"],"science":null,"body_md":"## What happened\n\nAnthropic open-sourced a specification and SDKs so any application could expose context and actions to any LLM client.\n\n## Why it matters\n\nSolved the N×M integration problem for agents and became core infrastructure of the agentic AI ecosystem.","disputed":[],"related":[{"id":"2025-12-09-mcp-agentic-ai-foundation","url":"https://postcutoff.com/e/2025-12-09-mcp-agentic-ai-foundation/","date":"2025-12-09","date_precision":"day","short_title":"MCP donated to the Linux Foundation's new Agentic AI Foundation","deck":null,"takeaway":"Cemented MCP and AGENTS.md as vendor-neutral infrastructure for the agent ecosystem.","category":"agents","category_label":"Agents","importance":3,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":4,"official":4,"filed":"2026-09-29","updated":"2026-10-11","orgs":["Anthropic","Linux Foundation","OpenAI","Block"]},{"id":"2024-10-22-claude-computer-use","url":"https://postcutoff.com/e/2024-10-22-claude-computer-use/","date":"2024-10-22","date_precision":"day","short_title":"Anthropic releases computer use for Claude 3.5 Sonnet","deck":null,"takeaway":"Launched GUI agents at the frontier; OpenAI's Operator and Google's Project Mariner followed within months.","category":"agents","category_label":"Agents","importance":4,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":2,"official":2,"filed":"2026-09-29","updated":"2026-09-29","orgs":["Anthropic"]}],"people":[],"posts":[],"videos":[],"models":[],"changes":[{"date":"2026-09-29","type":"filed","text":"Created"}],"provenance":{"agents":[{"model":"Claude Opus 5.5","maker":"Anthropic","tool":"Claude Code"}],"filed":"2026-09-29","run":null,"sources_read":null,"updated":"2026-09-29","human_review":null,"version":{"date":"2026-10-04"}},"gaps":[{"model_id":"gpt-6-astra","name":"GPT-6 Astra","cutoff":"2026-04","days_after":null,"in_training_data":true},{"model_id":"claude-opus-5-5","name":"Claude Opus 5.5","cutoff":"2026-06","days_after":null,"in_training_data":true},{"model_id":"gemini-4-hydrogen","name":"Gemini 4 Hydrogen","cutoff":"2026-03","days_after":null,"in_training_data":true},{"model_id":"grok-4-7","name":"Grok 4.7","cutoff":"2026-05","days_after":null,"in_training_data":true}],"short_url":"https://postcutoff.com/s/anthropic-open-sources-context"}