Integrate the Trello API.Caddi writes and runs the integration for you.
Trello has a REST API. Self-serve for any Trello user: create a Power-Up in the Power-Up admin portal to generate an API key.
- 99%of agent runs complete successfully
- ~45 minon average to build your first agent
- 1M+back-office tasks completed
The connection is a project before it does anything.
Before the first record moves: an app registration, credentials, token refresh, and somewhere to host and monitor the code. 300 requests per 10 seconds per API key and 100 requests per 10 seconds per token, with /1/members/ limited to 100 requests per 900 seconds.
Register an app, store Trello credentials, refresh tokens and code around the rate limits.
Connect your Trello account once. Caddi holds the connection.
The job doesn't stop at Trello.
An intake, a filing or a client update also runs through email, documents and the other systems your team works in. The Trello API only reaches Trello.
Each extra system is another API, another set of credentials, another integration to own.
One automation runs across every tool the job touches, each through its API.
Someone has to own the code.
API versions change, fields get added and your process moves.
A developer patches and redeploys the integration each time.
The person who does the work updates it by showing or describing the change. Every automation is reviewed before it runs in production, and every run is logged.
What the Trello API gives you
- Type
- REST (JSON)
- Authentication
- API key + user token (delegated authorization flow) or OAuth 1.0a
- Who can get access
- Self-serve for any Trello user: create a Power-Up in the Power-Up admin portal to generate an API key.
- What it covers
- Boards, lists, cards, checklists, labels, members, organizations (workspaces), actions, and webhooks.
- Limits
- 300 requests per 10 seconds per API key and 100 requests per 10 seconds per token, with /1/members/ limited to 100 requests per 900 seconds.
Official docs: developer.atlassian.com. Checked September 2026. Vendors change access terms, so confirm with Trello before you build.
When to build the Trello integration in-house
When you have engineers and the integration is your product, or you need one narrow sync between two systems and someone to own it. When the goal is getting Trello work off someone's desk, the build is the slow part, and Caddi does it for you.
What teams usually want the Trello API for
Docketed Mail Uploads
Caddi cross-checks docketed mail items, uploads the required documents to the board mail folder, and archives processed files.
Matter Transfer Reassignment
Caddi identifies unprocessed case transfers and reassigns matters across task and tracking systems, reducing manual cross-system handoff updates.
SOL Tracker Updates
Caddi pulls matter tracking details and updates the statute of limitations tracker sheet alongside Trello boards.
Inbound-to-card
Caddi reads inbound work-request emails and opens the matching Trello card with the right list, labels, and attachments.
Everything Caddi does with Trello.
Trello API questions
Does Trello have an API?
Yes. Trello has a REST API, authenticated with API key + user token (delegated authorization flow) or OAuth 1.0a. The official documentation is at https://developer.atlassian.com/cloud/trello/rest/.
How do I get access to the Trello API?
Self-serve for any Trello user: create a Power-Up in the Power-Up admin portal to generate an API key.
Does the Trello API have rate limits?
300 requests per 10 seconds per API key and 100 requests per 10 seconds per token, with /1/members/ limited to 100 requests per 900 seconds.
Can I connect Trello to my other tools without writing code against its API?
Yes. With Caddi you show the Trello task once, the way you'd train a new hire, and Caddi builds it as verified code that runs across Trello and the other tools the job touches. Steps that need a person's judgment are handed to Copilot or Claude, and Caddi monitors those too.
Do I need a developer to automate Trello with Caddi?
No. There is no integration code for you to write or maintain. Every automation Caddi builds for Trello is reviewed before it runs in production, and every run is logged.