PydanticAI + production, finally compatible.
PydanticAI gets the authoring model right. It deliberately doesn't try to be a platform. FastAgentic is the platform layer — first-class adapter, zero-friction, and fully type-safe end to end.
Zero-friction adapter
PydanticAIAdapter knows how to drive a PydanticAI Agent, stream its events, capture tool calls, and track costs. You write the agent, FastAgentic exposes it — all three protocols, one decorator.
What you gain
- REST + MCP + A2A from a single PydanticAI agent definition.
- Durable runs — resume agent runs across process restarts.
- Per-tenant budgets — enforce hard cost caps with PydanticAI's usage data.
- Built-in auth — OAuth2/OIDC without writing middleware.
- Telemetry — OpenTelemetry spans cover both FastAgentic and PydanticAI's internals.
Type safety, all the way down
PydanticAI is type-safe. FastAgentic is type-safe. Your whole stack is Pydantic 2 from request to response, with schemas shared across REST, MCP, and A2A. No string contracts.
Need FastAPI, LangGraph, or agent platform expertise?
Neul Labs — the team behind FastAgentic — takes on a limited number of consulting engagements each quarter. We help teams ship agents to production, fix broken LangGraph pipelines, and design governance for multi-tenant LLM platforms.