Add Attachment to Card
trello.add_attachment
ActionBusiness appsconnection required
Calls the Trello API with the connection's credentials.
Attach a URL to a card, optionally using it as the card's cover image.
Connection
- Required
- Yes — the node will not save without one
- Auth type
- API key
- Providers
- Trello
- Secret shape
- {"api_key", "token"}
- Resolved by
- config.connection_id, else node.connection_id
Configuration
5 fields, 2 required. A dotted path is a nested object and name[] an array of objects — the editor renders the same tree.
| Field | Type | Required | Default | Constraints | Example |
|---|---|---|---|---|---|
card_id The id or short link of the card to attach to. | string | Yes | — | — | — |
url The URL to attach; it must start with http:// or https://. | string | Yes | — | url format | — |
name A display name for the attachment, up to 256 characters. | string | No | — | ≤ 256 characters | — |
mime_type The attachment's MIME type, up to 256 characters, when Trello should not guess. | string | No | — | ≤ 256 characters | — |
set_cover Whether the new attachment becomes the card's cover image. | boolean | No | false | — | — |
Example configuration
Every value below is the contract’s own example or default — nothing invented.
{
"set_cover": false
}Output
One shape.
result
| Field | Type | Example |
|---|---|---|
id The attachment's id. | string | — |
name The attachment's display name. | string | — |
url The attached URL. | string | — |
bytes The attachment's size in bytes, or null for a link. | number | — |
date When the attachment was added, ISO-8601. | string | — |
mimeType The attachment's MIME type. | string | — |
isUpload True when the file lives in Trello rather than at a URL. | boolean | — |
{
"bytes": 0,
"date": "",
"id": "",
"isUpload": false,
"mimeType": "",
"name": "",
"url": ""
}Notes
- Only URL attachments are supported; Trello's file upload needs multipart/form-data.
See Add Attachment to Card run in a workflow.
In a technical demo we add the Trello connection, drop the node on the canvas and let Workflow Health pre-flight it before the first real run.