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Chat Platforms
Messaging platform APIs for building bots.
JSON: /api/v1/directory.json (filter on category=chat-platforms)
Slack API
Build bots and apps that read and post in Slack workspaces using the Web API and events.
Free tierOAuthTelegram Bot API
Free HTTP interface for creating Telegram bots, with tokens issued by BotFather.
FreeAPI keyDiscord Developer Platform
Bot and application APIs for building agents that live in Discord servers.
FreeOAuthMicrosoft Graph
One API for Outlook mail, Teams, calendar and files across Microsoft 365.
FreeOAuthWhatsApp Business Platform
Meta's Cloud API for sending and receiving WhatsApp messages from businesses.
PaidAPI keySlack
Boost productivity and save time with Slack — the AI work platform for managing projects, automating workflows, and connecting teams securely. Start working smarter today.
See siteSee docsDiscord
Discord is great for playing games and chilling with friends, or even building a worldwide community. Customize your own space to talk, play, and hang out.
See siteSee docsWhatsApp Business API
Grow customer engagement, marketing, sales and customer service success with business messaging on the platform with more than 2 billion users around the world.
See siteSee docsSignal
Say "hello" to a different messaging experience. An unexpected focus on privacy, combined with all of the features you expect.
See siteSee docsViber Business API
Learn more about Viber for Business products and offerings: advertising, stickers, chatbots and Business Messages.
See siteSee docsMatrix.org (Synapse)
Matrix, the open protocol for secure decentralised communications
See siteSee docsSignal Private Messenger API (Signal Service)
Specifications and software libraries for developers.
See siteSee docsMicrosoft Teams Bot Framework
Learn about bots and the application of bots across industry, and build familiarity with bots in Teams environment and bot development SDKs and libraries.
See siteSee docsGoogle Chat API
Build on the Chat platform to streamline interactions and workflows across teams.
See siteSee docsViber Public Accounts API
Viber lets everyone in the world connect. Freely. Millions of Viber users call, text, and send photos to each other, worldwide - for free.
See siteSee docsSignal Private Messenger (open source)
A private messenger for Windows, macOS, and Linux.
FreeNo authDiscord Webhooks
Reference for Discord webhook objects and management endpoints.
See siteSee docsSlack Webhooks
Incoming webhooks are a way to post messages from apps into Slack. Creating an incoming webhook gives you a unique URL to which you send a JSON payload with the message text and some.
See siteSee docsMicrosoft Teams Platform
Build bots and apps for Microsoft Teams.
FreeOAuthSignal CLI REST API
Self-hosted REST wrapper around signal-cli.
FreeNo auth