microsoft-agents-hosting-fastapi

What it is and what it does

Microsoft Agents Hosting FastAPI is a bridge between the Microsoft Agents framework and FastAPI, allowing you to deploy conversational agents as HTTP services. It wraps the core agent runtime with FastAPI-specific bindings, providing middleware for JWT authorization, predefined channel service endpoints, and support for streaming responses. The package is built on fastapi and starlette, so it inherits their async-first design.

You use it by instantiating a CloudAdapter with your connection manager, creating an AgentApplication, and wiring them into a FastAPI route handler via the start_agent_process function. The library handles the protocol translation between HTTP requests and the agent's internal activity model, letting you focus on agent logic rather than web framework plumbing.

Use it for:

• Host a conversational agent as a REST API endpoint that receives and responds to user messages over HTTP
• Integrate Microsoft Agents with existing FastAPI applications for multi-turn dialogue handling
• Deploy agents with JWT-based authorization and channel service compatibility
• Build streaming-capable agent responses for real-time conversation experiences

Worth the install?

AI-flagged interpretation of the facts on this page — verify before relying

Provides FastAPI integration for building and hosting conversational agents using the Microsoft Agents framework, including JWT authorization, channel service endpoints, and streaming response support.

Yes, if you are building conversational agents with the Microsoft Agents framework and want to deploy them on FastAPI. The package is actively maintained, has low install friction, carries a permissive MIT license, and integrates cleanly with FastAPI's async model. No known vulnerabilities.

Install

microsoft-agents-hosting-fastapi on PyPI

pip install microsoft-agents-hosting-fastapi

uv add microsoft-agents-hosting-fastapi

poetry add microsoft-agents-hosting-fastapi

Installing microsoft-agents-hosting-fastapi

Before you install

Low install friction with a pure-Python wheel. Actively maintained with releases every 2–3 weeks; last commit 2026-08-13. Requires Python >=3.10. Depends on microsoft-agents-hosting-core, fastapi, and starlette.

License in practice

MIT license permits commercial and private use with minimal restrictions; suitable for most projects.

Quickstart

pip install microsoft-agents-hosting-fastapi

from fastapi import FastAPI, Request
from microsoft_agents.hosting.fastapi import start_agent_process, CloudAdapter
from microsoft_agents.hosting.core.app import AgentApplication

app = FastAPI()
adapter = CloudAdapter(connection_manager=connection_manager)
agent_app = AgentApplication()

@app.post("/api/messages")
async def messages(request: Request):
    return await start_agent_process(request, agent_app, adapter)

Requires Python >=3.10

Verify before relying

• Whether the package supports streaming response patterns beyond what the description excerpt shows
• Specific JWT authorization middleware configuration requirements and defaults
• Whether CloudAdapter and AgentApplication are fully documented or require external Microsoft Agents docs

Package facts

Evidence: microsoft_agents_hosting_fastapi-1.3.0-py3-none-any.whl

Tags

More Application Frameworks packages