slackclient
Slack API clients for Web API and RTM API (Legacy) - Please use https://pypi.org/project/slack-sdk/ instead.
Decision gist · record as of 2026-08-14
Yes, but with conditions: slackclient remains functional and suitable for maintaining existing applications, but the project's own documentation explicitly recommends the successor project for new development. Install only if you are maintaining legacy code or have a specific reason not to migrate. For new Slack integrations, use the successor project instead.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires a valid Slack API token set in the SLACK_API_TOKEN environment variable and appropriate bot permissions.
- Low install friction with a single runtime dependency (aiohttp).
- Active maintenance status with recent commits, though the package is in maintenance mode.
License · maintenance · safety
MIT (permissive) — MIT license permits commercial and private use with minimal restrictions, making it suitable for most projects.
last release 2022-04-22 (1575 days) · last repo commit 2026-08-13 · 4,012 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 7,699,515 downloads/mo, #1,707 on PyPI
Alternatives
Verify before relying
pip install slackclient
from slackclient import WebClient
import os
client = WebClient(token=os.environ['SLACK_API_TOKEN'])
response = client.chat_postMessage(channel='#random', text='Hello world!')- Whether async/await patterns are fully supported across all API methods or only specific ones.
- Current state of RTM API support given Slack's deprecation timeline for real-time messaging.
- Performance characteristics when handling high-volume message throughput or large workspaces.
- Specific migration path and effort required to move from slackclient to the successor project.
What it is and what it does
slackclient is a Python SDK for interacting with Slack's Web API and RTM API, enabling developers to build custom applications, bots, and integrations that send messages, upload files, and respond to real-time events in Slack. It wraps Slack's HTTP and WebSocket APIs with Python methods, handling authentication via tokens and providing event-driven callbacks for RTM connections.
The package requires Python 3.6 and above and depends on aiohttp for async HTTP operations. It is currently in maintenance mode; the project's own documentation recommends migrating to the successor project for new development, which offers additional features like Socket Mode, OAuth flows, and improved asyncio support. Existing slackclient code can continue to function, but users should plan for eventual migration.
Use it for
- Send messages and notifications to Slack channels programmatically from Python applications.
- Upload files to Slack channels as part of automated workflows or reporting systems.
- Build event-driven bots that listen for and respond to messages using the RTM API.
- Integrate third-party services into Slack by posting updates or alerts to specific channels.
- Create custom Slack apps that interact with the Web API for channel management and user interactions.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, but with conditions: slackclient remains functional and suitable for maintaining existing applications, but the project's own documentation explicitly recommends the successor project for new development.
Install only if you are maintaining legacy code or have a specific reason not to migrate. For new Slack integrations, use the successor project instead.
Install
slackclient on PyPI
Before you install
Low install friction with a single runtime dependency (aiohttp). Active maintenance status with recent commits, though the package is in maintenance mode.
Requires a valid Slack API token set in the SLACK_API_TOKEN environment variable and appropriate bot permissions.
License in practice
MIT license permits commercial and private use with minimal restrictions, making it suitable for most projects.
Quickstart
pip install slackclient
from slackclient import WebClient
import os
client = WebClient(token=os.environ['SLACK_API_TOKEN'])
response = client.chat_postMessage(channel='#random', text='Hello world!')Verify before relying
- Whether async/await patterns are fully supported across all API methods or only specific ones.
- Current state of RTM API support given Slack's deprecation timeline for real-time messaging.
- Performance characteristics when handling high-volume message throughput or large workspaces.
- Specific migration path and effort required to move from slackclient to the successor project.
Package facts
| License | MIT permissive |
| Python support | Supports the current Python release >=3.6.0 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 1 packageaiohttp |
| Maintenance | Actively maintained 1,575 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 7,699,515 / month, #1,707 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 5 - Production/StableIntended Audience :: DevelopersLicense :: OSI Approved :: MIT LicenseProgramming Language :: PythonProgramming Language :: Python :: 3Programming Language :: Python :: 3.10Programming Language :: Python :: 3.6Programming Language :: Python :: 3.7Programming Language :: Python :: 3.8Programming Language :: Python :: 3.9Topic :: Communications :: ChatTopic :: Office/BusinessTopic :: System :: Networking |
Evidence: slackclient-2.9.4-py2.py3-none-any.whl
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See also RtmAPI · slack-discovery-sdk · slack-sdk · slackblocks · slackweb · mattermostwrapper · slacker · slackeventsapi · blockkit · apache-airflow-providers-slack