slackApiDoc

An unofficial documentation of "undocumented" Slack API methods.

Purpose

Slack has a great web API which is documented here. In addition there are a couple of so called "undocumented" methods. These methods provide some additional and very useful functionality that is not available with the official set of API methods. The purpose of this document is to provide an up-to-date documentation to anyone who wants to use these methods.

Disclaimer

Please note that Slack explicitely states in its API Terms of Service that all undocumented methods "may change at any time, you should not rely on these behaviors.". So use them at your own risk.

Scope of this repo

This repo contains a documentation of so called "undocumented" API methods for Slack. These methods are not documented in the official API documentation and usually require a legacy token to be used.

API methods that are only available via the web UI and require a runtime token are out of scope of this repo.

How to use undocumented API methods

• Token type: In general all undocumented API methods require the post scopes and therefore needs to be called with a legacy token.
• Slack apps: Since the post scope is not available through the standard Oauth process they can not be directly used in a normal Slack app. In order to use them in a Slack app a legacy token for the respective workspace needs to always be manually create and added.
• Request types: In general these API methods support GET and standard POST requests only. Standard POST requests use bodies encoded as application/x-www-form-urlencoded. The more modern JSON encoded bodies are not supported.

Licence

This documentation is provided as public domain. Any help in keeping this document up-to-date and as complete and accurate as possible is very welcome.

Slack and the Slack API is owned by Slack Technologies, Inc. All rights reserved by Slack.