Trello
Boards, lists and cards to help you organize and prioritize your projects.
About Trello
Trello's developer site documents how to extend Trello through Power-Ups, which add functionality such as buttons on cards and boards, previews of attachments, and card badges displaying extra data. It provides guides for building, styling, and submitting Power-Ups, along with a REST API, webhooks, authentication and authorization documentation, rate limits, and a client.js library for browser-based integration.
The documentation covers topics including custom fields, embedding cards and boards, board tile and card components, action types, and status codes. It also includes compliance information on personal data storage and GDPR, developer terms, and a public marketplace review process for submitting completed Power-Ups.
This resource is intended for developers building integrations or add-ons for Trello, including those creating Power-Ups for internal team use or for public distribution through Trello's marketplace.
Key features
- Build Power-Ups that add custom buttons to Trello boards and cards
- Display data previews and status updates in card badges
- Add dynamic buttons on the back of cards for user interaction
- Embed third-party attachment previews (e.g. images, status updates) on cards
- REST API with webhooks, custom fields, and rate limits
- client.js library for building Power-Ups
Frequently asked questions
What is the primary way to build integrations on Trello?
The primary way to build on top of Trello is to create a Power-Up, which adds extra functionality like buttons, card badges, and attachment previews inside Trello.
Does Trello provide a REST API?
Yes, Trello has a REST API with documentation covering authorization, webhooks, nested resources, custom fields, and rate limits.
Is there a client library for building Power-Ups?
Yes, Trello provides a client.js library with its own reference and getting-started documentation.
Who maintains Trello's developer platform?
Trello is developed by Atlassian, as indicated by the site's copyright notice.
Where can developers get support or submit a Power-Up?
Developers can visit the developer community forums or the dev-support page for help, and can submit a Power-Up through a review process to list it in the marketplace.
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