genkit-plugin-fastapi 0.5.2

Genkit FastAPI Plugin

Genkit FastAPI Plugin

Serve Genkit flows as FastAPI endpoints.

Installation

pip install genkit-plugin-fastapi

Usage

from fastapi import FastAPI from genkit import Genkit from genkit.plugins.fastapi import genkit_fastapi_handler from genkit.plugins.google_genai import GoogleAI

ai = Genkit(plugins=[GoogleAI()]) app = FastAPI()

@ai.flow() async def chat_flow(prompt: str) -> str: response = await ai.generate(prompt=prompt) return response.text

@app.post('/chat') @genkit_fastapi_handler(ai) async def chat(): return chat_flow

Running

# With Genkit Dev UI
genkit start -- uvicorn main:app --reload

# Production (no Dev UI)
uvicorn main:app

Streaming

The handler automatically supports streaming when the client sends Accept: text/event-stream:

curl -X POST http://localhost:8000/chat \
  -H "Content-Type: application/json" \
  -H "Accept: text/event-stream" \
  -d '{"data": "Tell me a joke"}'