Slack Web API

A collection of HTTP RPC-style methods used to query workspace data and automate actions in Slack.

The Slack Web API provides over 200 HTTP-based methods to programmatically manage your workspace operations. Developers use it to post rich messages via chat.postMessage, manage channels with the conversations family, and retrieve user profiles. The API supports both URL-encoded and JSON payloads, requiring HTTPS and TLS 1.2 or higher for secure communication. By integrating these endpoints, teams can automate complex workflows, build custom Slack apps, and sync external business systems directly into their chat interface.

https://api.slack.com/web