# ClickUp

## Connection

When you're setting up your first workflow with ClickUp, you will need to create a [connection](https://docs.getmesa.com/going-further/credential) in order to connect MESA with ClickUp.

<figure><img src="/files/fMHvScFKZUD6GTT4DF6h" alt=""><figcaption></figcaption></figure>

Click Sign in with ClickUp to login to your account and connect your Workspace with MESA.

Once that's done, your connection is complete.

## Technical Notes

### ClickUp Free Plan: Custom Field Limits

#### What's the limitation?

ClickUp's Free Forever plan limits how many times custom fields can be set across tasks in a space.

#### Why does this affect workflows?

Automated workflows can hit this limit faster than manual use.

#### Common problems

* Workflow fails
* Error mentions "Custom field usages exceeded"

#### How to fix it

* Remove unused custom fields in ClickUp
* Reduce how often workflows set custom fields
* Upgrade your ClickUp plan

#### Example

A workflow that updates 3 custom fields on every new task will hit the limit faster than expected.

### Task Update Trigger

Adding an attachment to a task won't run the Task Update trigger, but uploading an attachment to a task comment will.


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