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Pydantic AI v2.29.0 adds FastMCP 4 and MCP SDK v2 support
agent-framework mcp orchestration tool-use
Pydantic AI v2.29.0 is a quiet but meaningful release for anyone building production agent pipelines. MCP SDK v2 and FastMCP 4 support land in MCPToolset, while backward compatibility with FastMCP 3 stays intact, so teams can upgrade on their own schedule without breaking what's already running. The addition of Azure AI Voice Live via the new azure_voice_live setting is worth noting too: real-time voice agents on Azure infrastructure, available now, not on a roadmap.
Full analysis
Pydantic AI v2.29.0 (released 2026-08-12) adds support for FastMCP 4 and MCP SDK v2 in its MCPToolset, while maintaining backward compatibility with FastMCP 3. MCP (Model Context Protocol) is a standard for connecting AI agents to external tools and data sources. The release also introduces Azure AI Voice Live via a new azure_voice_live setting, enabling real-time voice agent capabilities on Azure infrastructure.
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