> ## 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

> **LEGACY.** This endpoint keeps working unchanged. For new integrations, use [Bulk upsert contacts](/api-reference/contacts/bulk-upsert-contacts) on `https://api.cloudtalk.io/v1`, which creates and updates up to 100 contacts in one request. Bulk delete has no v1 equivalent yet: the v1 API deletes one contact at a time, with [Delete a contact](/api-reference/contacts/delete-a-contact).

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](https://help.cloudtalk.io/en/articles/7056354-managing-contacts.md)
- [Pipedrive Deal Stage: Zapier Automation](https://help.cloudtalk.io/en/articles/5724062-pipedrive-deal-stage-zapier-automation.md)
- [API reference](https://help.cloudtalk.io/api-reference/overview.md)


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