AsyncFast

AsyncFast is a modern, event framework for building APIs with Python based on standard Python type hints.

Installation

pip install asyncfast==0.49.0

Example

Create a file main.py with:

from asyncfast import AsyncFast
from pydantic import BaseModel

app = AsyncFast()


class Payload(BaseModel):
    id: str
    name: str


@app.channel("topic")
async def on_topic(payload: Payload) -> None:
    print(payload)

Running

To run the app install an AMGI server (at the moment there is only amgi-aiokafka) then run:

$ asyncfast run amgi-aiokafka main:app topic

AsyncAPI Generation

$ asyncfast asyncapi main:app
{
  "asyncapi": "3.0.0",
  "info": {
    "title": "AsyncFast",
    "version": "0.1.0"
  },
  "channels": {
    "OnTopic": {
      "address": "topic",
      "messages": {
        "OnTopicMessage": {
          "$ref": "#/components/messages/OnTopicMessage"
        }
      }
    }
  },
  "operations": {
    "receiveOnTopic": {
      "action": "receive",
      "channel": {
        "$ref": "#/channels/OnTopic"
      }
    }
  },
  "components": {
    "messages": {
      "OnTopicMessage": {
        "payload": {
          "$ref": "#/components/schemas/Payload"
        }
      }
    },
    "schemas": {
      "Payload": {
        "properties": {
          "id": {
            "title": "Id",
            "type": "string"
          },
          "name": {
            "title": "Name",
            "type": "string"
          }
        },
        "required": [
          "id",
          "name"
        ],
        "title": "Payload",
        "type": "object"
      }
    }
  }
}

Contact

For questions or suggestions, please contact jack.burridge@mail.com.

License

Metadata

Release files for asyncfast 0.49.0

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Built distribution (wheel)

Table of built distributions (wheels) for asyncfast 0.49.0
File	Interpreter	ABI	Platform	Reset
asyncfast-0.49.0-py3-none-any.whl 16.8 kB Oct 13, 2026	Python 3	none	any	Details

Release files / asyncfast-0.49.0-py3-none-any.whl

Download URL	asyncfast-0.49.0-py3-none-any.whl
Size	16.8 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`f9fe56fa77f3696e137052b98f89dda9e411a2e791a98c21bbbb2da4d09070fd`
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Upload date	Oct 13, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
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