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Connect Slack to Trello
Automate Slack and Trello with AI
Trello boards help teams visualize work but updates stall when everything happens in Slack. Operator.io points your OpenClaw agent at both apps so a starred or flagged message can become a card on the right list with checklist items from the thread, and card moves post back to Slack when status changes. Ask for what is on a board and it reads Trello and summarizes in the channel.
It reaches both apps directly or through connectors like Composio MCP and Pipedream MCP, which handle the sign in and token refresh, so there is no Zap to build and no API keys to paste.
What your agent can do with Slack and Trello
What your agent does in Slack
Add call participants
Registers new participants added to a Slack call.
Add emoji
Adds a custom emoji to a Slack workspace given a unique name and an image URL; subject to workspace emoji limits.
Add an emoji alias
Adds an alias for an existing custom emoji in a Slack Enterprise Grid organization.
Add Enterprise user to workspace
Adds an Enterprise user to a workspace. Use when you need to assign an existing Enterprise Grid user to a specific workspace with optional guest restrictions.
Add reaction to message
Adds a specified emoji reaction to an existing message in a Slack channel, identified by its timestamp; does not remove or retrieve reactions.
Add a remote file
Adds a reference to an external file (e.g., Google Drive, Dropbox) to Slack for discovery and sharing, requiring a unique `external_id` and an `external_url` accessible by Slack.
What your agent does in Trello
Add board
Creates a new Trello board; the 'name' parameter is required for creation, and various preferences can be customized or cloned from a source board.
Add card
Creates a new card in a Trello list. Only `idList` is required; `idBoard` is optional as the API determines the board from the list.
Add comment to card
Adds a new text comment, which can include @mentions, to a Trello card specified by its ID; file attachments are not supported via this action.
Add attachment to card
Adds an attachment to a Trello card by `idCard`; specify either a `file` to upload or a `url` to link, but not both.
Add checklist to card via id
Adds a checklist to a Trello card: use `value` to add a specific existing checklist, `idChecklistSource` to create a new checklist by copying an existing one (optionally using `name` for the new checklist's name), or `name` to create a n...
Add label to card
Adds an existing label to a Trello card; `idCard` identifies the card and `value` is the ID of the label to add. Both card and label must already exist.
How it works
Tell the agent what you want to happen between Slack and Trello, for example to watch one and act in the other, or to keep the two in step. It reads what it needs from Slack, works out what to do, and runs the matching action in Trello without you mapping a single field.
You can have it run once, on a schedule, or whenever something changes. Ask it for a status any time and it reads the latest from both apps back to you in the same chat.
Common questions about Slack and Trello
- How do I connect Slack and Trello to Operator?
- You authorize Slack and Trello once each from your Operator dashboard. Operator holds both connections and refreshes the access tokens for you, so your agent keeps working across them without you signing in again.
- What can my agent do across Slack and Trello?
- You describe the outcome in plain language and your agent works between the two, reading from one and acting in the other. It picks the right Slack and Trello actions on its own, so you do not map fields or pick triggers.
- Can my agent keep Slack and Trello in sync?
- Yes. It can watch Slack and act in Trello, or keep both in step, reading from one and running the matching update in the other. This runs on demand when you ask or on a schedule you set.
- Do I need to build a workflow or write code?
- No. There is no workflow to build, no fields to map, and no API keys to paste. Operator manages both connections, and you give the agent instructions in plain language.
Slack and Trello integrations
Put your agent on Slack and Trello
Sign in, connect both apps, and hand your agent the work. The same setup reaches every app in the catalog. Your first week is free.
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