Slack

Slack Slash Commands API

Slack Slash Commands allow users to invoke app functionality directly from the message composer box by typing a forward slash followed by a command name and optional parameters. When a user triggers a slash command, Slack sends an HTTP POST request to the app's configured Request URL with details about the command, user, channel, and any text entered. The app can respond with a message (visible to everyone or only to the invoking user), open a modal, or trigger other interactive flows.

GitHub

Documentation

📖
Documentation
https://docs.slack.dev/interactivity/slash-commands

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API 
curl "https://apis.io/api/v1/apis/slack-slash-commands-api"
All apis 
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

API entry from apis.yml

apis.yml Raw ↑ 
aid: slack:slack-slash-commands-api
name: Slack Slash Commands API
tags:
- Commands
- Interactivity
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
baseURL: https://slack.com/api
humanURL: https://docs.slack.dev/interactivity/slash-commands
properties:
- url: https://docs.slack.dev/interactivity/slash-commands
  type: Documentation
description: Slack Slash Commands allow users to invoke app functionality directly from the message composer
  box by typing a forward slash followed by a command name and optional parameters. When a user triggers
  a slash command, Slack sends an HTTP POST request to the app's configured Request URL with details about
  the command, user, channel, and any text entered. The app can respond with a message (visible to everyone
  or only to the invoking user), open a modal, or trigger other interactive flows.