> ## Documentation Index
> Fetch the complete documentation index at: https://help.cloudtalk.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Contact actions

> Max 10 actions are available in one request. Only sent parameters/values will be updated. If you want to clear the value, just set empty string for that attribute. After sending empty string for properties of `ContactNumber`, `ContactEmail`, `ContactsTag` or `ContactAttribute` all data from these properties will be cleared. When you send values for properties of `ContactNumber`, `ContactEmail`, `ContactsTag` or `ContactAttribute` only these data will be updated, all other will be cleared.



## API Specification

The full API specification for this endpoint is available in the [documentation index](https://help.cloudtalk.io/llms.txt).


## Related topics

- [Managing Contacts](/en/articles/7056354-managing-contacts.md)
- [CloudTalk REST API: Call Center Automation Platform](/guides/introduction.md)
- [Pipedrive Deal Stage: Zapier Automation](/en/articles/5724062-pipedrive-deal-stage-zapier-automation.md)


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.