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jlowin merged 1 commit into from
Dec 24, 2025
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Add v3 breaking changes notice to README #2712

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5 changes: 4 additions & 1 deletion README.md
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Expand Up @@ -33,6 +33,9 @@
>
> **For production MCP applications, install FastMCP:** `pip install fastmcp`

> [!Important]
> FastMCP 3.0 is in development and may include some breaking changes. To avoid unexpected issues, pin your dependency to v2: `fastmcp<3`

---

**FastMCP is the standard framework for building MCP applications**, providing the fastest path from idea to production.
Expand Down Expand Up @@ -79,7 +82,7 @@ There are two ways to access the LLM-friendly documentation:
## Table of Contents

- [FastMCP v2 🚀](#fastmcp-v2-)
- [📚 Documentation](#-documentation)
- [📚 Documentation](#-documentation)
- [What is MCP?](#what-is-mcp)
- [Why FastMCP?](#why-fastmcp)
- [Installation](#installation)
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