The Zulip REST API

The Zulip REST API powers the Zulip web and mobile apps, so anything you can do in Zulip, you can do with Zulip's REST API. To use this API:

• You'll need to get an API key. You will likely want to create a bot, unless you're using the API to interact with your own account (e.g. exporting your personal message history).
• Choose what language you'd like to use. You can download the Python or JavaScript bindings, or just make HTTP requests with your favorite programming language. If you're making your own HTTP requests, you'll want to send the appropriate HTTP Basic Authentication headers; see each endpoint's curl option for details on the request format.
• The Zulip API has a standard system for reporting errors.

Most other details are covered in the documentation for the individual endpoints:

Messages

• Get messages
• Get a raw message
• Send a message
• Update a message
• Render a message
• Upload a file
• Delete a message
• Construct a narrow
• Get a message's edit history
• Update a message's flags
• Mark messages as read in bulk

Streams

• Get all streams
• Get subscribed streams
• Add subscriptions
• Update subscription settings
• Remove subscriptions
• Get topics in a stream
• Topic muting
• Create a stream
• Get stream ID
• Delete a stream
• Update a stream

Users

• Get all users
• Get profile
• Create a user
• Set "typing" status
• Get user presence
• Get all user groups
• Update notification settings
• Create a user group
• Update a user group
• Delete a user group

Server & organizations

• Get server settings
• List linkifiers
• Create linkifiers
• Remove linkifiers
• Get all custom emoji
• Upload custom emoji

Real-time events

• Real time events API
• Register an event queue
• Get events from an event queue
• Delete an event queue

Specialty endpoints

• Fetch a development API key

Since Zulip is open source, you can also consult the Zulip server source code as a workaround for how to do anything not documented here.