The Trello MCP server lets an agent read and modify boards. Trello’s simplicity means boards accumulate cards faster than anyone reviews them, and the most useful thing an agent can do here is read the whole board and tell you what is actually on it.
What it actually does
The server authenticates with a Trello API key and token, then exposes boards, lists, cards, labels and checklists as tools. The agent can enumerate a board, read card details, create cards, move them between lists, and update their contents. Because it reads everything at once, it can answer questions about the board’s shape rather than about individual cards.
Practical patterns:
- ‘Summarise what is in the Doing column and flag anything that has not moved in a fortnight.’
- ‘Create cards for each of the action points from these meeting notes.’
- ‘Which cards have checklists that are only half complete?‘
Why use it
A Trello board is a good capture tool and a poor reporting tool. Once there are two hundred cards, nobody reads the board, they just look at the column they own. An agent that can read all of it surfaces the things that have quietly stalled, which is exactly the information the board was supposed to make visible and stopped making visible somewhere around card eighty.
Gotchas
The authentication is the fiddly part: Trello wants both an API key and a separately generated token, and mixing them up produces unhelpful errors. Power-Up data generally does not come through the standard API, so if your workflow depends on a Power-Up field, the agent cannot see it. Card creation is easy enough that an agent can produce a great many cards from one set of notes, so be specific about how many you want.
