async-firebase 6.0.2

Async Firebase Client - a Python asyncio client to interact with Firebase Cloud Messaging in an easy way.

Lightweight asynchronous Python client for Firebase Cloud Messaging (FCM)

• Free software: MIT license
• Requires: Python 3.10+

Features

• Extremely lightweight and does not rely on firebase-admin which is hefty
• Send push notifications to Android, iOS, and Web devices
• Multicast push notifications (up to 500 tokens per call)
• Send to topics and topic conditions
• TTL, priority, and collapse-key support
• Dry-run mode for testing
• Topic management (subscribe/unsubscribe devices)
• Async context manager for proper resource cleanup

Installation

pip install async-firebase

Quick Start

import asyncio

from async_firebase import AsyncFirebaseClient, Message, AndroidConfig


async def main():
    async with AsyncFirebaseClient() as client:
        client.creds_from_service_account_file("secret-store/mobile-app-79225efac4bb.json")

        # or using a dictionary
        # client.creds_from_service_account_info({...})

        android_config = AndroidConfig.build(
            priority="high",
            ttl=2419200,
            collapse_key="push",
            title="Store Changes",
            body="Recent store changes",
            data={"discount": "15%", "key_1": "value_1"},
        )
        message = Message(android=android_config, token="device-token-here")
        response = await client.send(message)

        print(response.success, response.message_id)


if __name__ == "__main__":
    asyncio.run(main())

send() returns an FCMResponse with success (bool), message_id (str), and exception (on failure) attributes.

Platform Configs

Build platform-specific configs using the .build() classmethod:

Android

from async_firebase import AndroidConfig

android_config = AndroidConfig.build(
    priority="high",
    ttl=2419200,
    collapse_key="push",
    data={"discount": "15%", "key_1": "value_1"},
    title="Store Changes",
    body="Recent store changes",
)

New in v6.0: image, ticker, sticky, event_timestamp, local_only, notification_priority, vibrate_timings_millis, default_vibrate_timings, default_sound, light_settings, default_light_settings, fcm_options, direct_boot_ok, bandwidth_constrained_ok, restricted_satellite_ok.

iOS (APNs)

from async_firebase import APNSConfig

apns_config = APNSConfig.build(
    priority="normal",
    ttl=2419200,
    apns_topic="store-updated",
    collapse_key="push",
    title="Store Changes",
    alert="Recent store changes",
    badge=1,
    category="test-category",
    custom_data={"discount": "15%", "key_1": "value_1"},
)

New in v6.0: subtitle, sound as CriticalSound, fcm_options, live_activity_token.

Web Push

from async_firebase import WebpushConfig

webpush_config = WebpushConfig.build(
    data={"discount": "15%"},
    title="Store Changes",
    body="Recent store changes",
    link="https://example.com/store",
)

Note: client.build_android_config(), client.build_apns_config(), and client.build_webpush_config() are deprecated. Use the .build() classmethods directly.

Multicast

Send notifications to up to 500 devices at once:

from async_firebase import AsyncFirebaseClient, MulticastMessage, AndroidConfig

async with AsyncFirebaseClient() as client:
    client.creds_from_service_account_info({...})

    android_config = AndroidConfig.build(priority="high", title="News", body="Breaking news!")

    multicast = MulticastMessage(
        android=android_config,
        tokens=["token_1", "token_2", "token_3"],
    )
    batch_response = await client.send_each_for_multicast(multicast)

    for resp in batch_response.responses:
        print(resp.success, resp.message_id)

send_each_for_multicast() returns an FCMBatchResponse containing individual FCMResponse objects for each token.

Topics

Sending to a topic

from async_firebase import AsyncFirebaseClient, Message, AndroidConfig

async with AsyncFirebaseClient() as client:
    client.creds_from_service_account_info({...})

    message = Message(
        android=AndroidConfig.build(priority="high", title="News", body="Update!"),
        topic="breaking-news",
    )
    response = await client.send(message)

A Message accepts exactly one of: token, topic, or condition.

Managing topic subscriptions

from async_firebase import AsyncFirebaseClient

async with AsyncFirebaseClient() as client:
    client.creds_from_service_account_info({...})

    # Subscribe
    response = await client.subscribe_devices_to_topic(
        device_tokens=["token_1", "token_2"],
        topic_name="breaking-news",
    )

    # Unsubscribe
    response = await client.unsubscribe_devices_from_topic(
        device_tokens=["token_1", "token_2"],
        topic_name="breaking-news",
    )

Advanced Usage

Dry-run mode

Validate messages without actually sending them:

response = await client.send(message, dry_run=True)

Dry-run is available on send(), send_each(), and send_each_for_multicast().

Direct dataclass construction

For full control, construct message dataclasses directly instead of using .build():

from datetime import datetime, timezone
from async_firebase.messages import APNSConfig, APNSPayload, ApsAlert, Aps, Message

apns_config = APNSConfig(
    headers={
        "apns-expiration": str(int(datetime.now(timezone.utc).timestamp()) + 7200),
        "apns-priority": "10",
        "apns-topic": "test-topic",
        "apns-collapse-id": "something",
    },
    payload=APNSPayload(
        aps=Aps(
            alert=ApsAlert(title="some-title", body="alert-message"),
            badge=0,
            sound="default",
            content_available=True,
            category="some-category",
            mutable_content=False,
            custom_data={
                "link": "https://link-to-somewhere.com",
                "ticket_id": "YXZ-655512",
            },
        )
    ),
)

message = Message(apns=apns_config, token="device-token-here")
response = await client.send(message)

Error handling

Send failures raise specific exceptions from async_firebase.errors:

from async_firebase.errors import (
    AsyncFirebaseError,
    UnregisteredError,
    QuotaExceededError,
    InvalidArgumentError,
)

try:
    response = await client.send(message)
except UnregisteredError:
    # Device token is no longer valid — remove it
    ...
except QuotaExceededError:
    # FCM rate limit hit — back off and retry
    ...
except AsyncFirebaseError as e:
    print(e.code, e.message)

Failed responses also populate FCMResponse.exception without raising, depending on the send method.

Changelog

See CHANGES.md for the full release history.

License

async-firebase is offered under the MIT license.