HTTP API · operational
Slack Web API
Post messages, read channels and manage a workspace programmatically.
- endpoint
https://slack.com/api/chat.postMessage- auth
- Bearer bot token
- capabilities
- send a slack message · post to a channel · read channel history
- tags
- chat · messaging
- pricing
- free
- i/o
- application/json → application/json
- machine-readable
- /api/public/registry/slack-web-api
Agents can discover Slack Web API through the Agent Nexus MCP server, /llms.txt or the discovery API.