Microsoft Agents Hosting - Slack

Integration library for building Slack agents using the Microsoft 365 Agents SDK. Provides direct-to-Slack responses (the full Slack Web API surface, beyond what Azure Bot Service exposes), a typed SlackChannelData envelope with dot-notation property access, and a SlackStream helper for chat.startStream / chat.appendStream / chat.stopStream.

Release Notes

Version	Date	Release Notes
1.2.0	2026-07-17	1.2.0 Release Notes
1.1.0	2026-06-19	1.1.0 Release Notes

Installation

pip install microsoft-agents-hosting-slack

Usage

from microsoft_agents.hosting.core.app import AgentApplication
from microsoft_agents.hosting.slack import SlackAgentExtension
from microsoft_agents.hosting.slack.api import SlackChannelData

app = AgentApplication(options)
slack = SlackAgentExtension(app)

@slack.on_message()
async def on_slack_message(context, state):
    channel_data = SlackChannelData.from_activity(context.activity)
    await slack.call(
        context,
        "chat.postMessage",
        {
            "channel": channel_data.get("event.channel"),
            "text": f"You said: {context.activity.text}",
        },
        token=channel_data.api_token,
    )

Key Classes

SlackAgentExtension — registers Slack-channel-scoped message/event handlers; exposes call(...) and create_stream(...).
SlackChannelData — typed wrapper around Bot Service's Slack channel-data payload with get(path) / try_get(path) accessors.
SlackApi — async HTTP client for the Slack Web API.
SlackStream — wraps Slack's streaming methods for incremental message updates.
SlackHelpers — encode/decode and conversation-id parsing utilities.

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