See jira asignee in trello board when using smart list to migrate jira issues to trello

[Claudia Ardura]

Is there a way that I can see the asignee in trello in the task I migrated from jira to trello through smart list? I have team members that have taks in jira but also in trello and during the stand ups we just want to use one board. At the moment I cannot filter the tasks in the jira smart list in the trello board

[Germán Morales _ Hiera]

Hi @Claudia Ardura, @Liam Do's suggestion is a solid path if you can budget a Power-Up, but since you specifically want a free route inside Atlassian tools, there is a way using Jira Cloud Automation (available on Free) plus a single call to the Trello REST API. No third party app needed.

The flow:

• Trigger: Field value changed, with Fields to monitor set to Assignee.
• Condition (optional): Issue fields condition on Assignee is not empty, so it only fires when the issue actually gets someone assigned (not when it is unassigned).
• Action: Send web request.

In the Send web request step:

• Webhook URL: https://api.trello.com/1/cards?key=YOUR_TRELLO_KEY&token=YOUR_TRELLO_TOKEN
• HTTP method: POST
• Web request body: Custom data
• Body type: application/json
• Custom data:

{
  "idList": "YOUR_TRELLO_LIST_ID",
  "name": "{{issue.key}} - {{issue.summary}}",
  "desc": "Assigned to {{issue.assignee.displayName}} in Jira"
}

To get the Trello credentials and the list ID:

• Generate an API key and token from your Trello account at https://trello.com/power-ups/admin. The auth pattern (key + token as query params) is documented in Authorizing With Trello's REST API.
• For the idList, open the Trello board in a browser and append .json to the URL. You will see the IDs of every list on that board.

A couple of caveats worth knowing before you build this:

• On Jira Cloud Free, global automation rules have a monthly execution limit. If assignments happen rarely this is not an issue, but it is something to be aware of.
• The Trello token grants access to your Trello account, so treat it like a password. In the Send web request headers you can mark values as hidden, but the URL itself is plain text in the rule.
• This rule only creates the card. It does not keep Jira and Trello in sync. If the assignee changes later or the issue is closed, the Trello card will not update unless you add more rules.

References:

• Jira automation actions (Send web request)
• How to extend Automation for Jira with REST API calls
• Trello REST API - Cards

Hope this helps. If you hit a wall configuring the rule, share the response body from the Automation logs and we can look at it.

[Liam Do - DevSamurai]

Hi @Claudia Ardura ,

Unfortunately, Smart Lists in Trello have limited field support right now. This is because Jira and Trello have separate user systems — a Jira assignee doesn't automatically translate to a Trello board member.

I took a look and found a third-party Power-Up that might suit your case: Jira + Trello 2-Way Sync. 

Hope it helps 🙌
Liam

[Claudia Ardura]

Thanks @Liam Do - DevSamurai ! I was looking for something for free integrated in Altassian tools. Do you know if it is possible to create a trello card when a jira issue is assigned to someone? 

[Liam Do - DevSamurai]

Hi @Claudia Ardura, if you are looking for a no-cost method for this, using Automation as @Germán Morales _ Hiera suggests is the best way to go 😁