# Manage contact identifiers

## Identifiers

Identifiers in the Bird Contacts API are unique pieces of information that represent specific ways to recognize or reach a contact across systems and platforms. They can include data such as email addresses or external system IDs, enabling seamless integration and reliable mapping of contacts across various workflows.

### API Reference Guide <a href="#api-reference-guide" id="api-reference-guide"></a>

1. [Create contact identifier](https://docs.bird.com/api/contacts-api/api-reference/manage-contact-identifiers/create-contact-identifier)
2. [List contact identifiers](https://docs.bird.com/api/contacts-api/api-reference/manage-contact-identifiers/list-contact-identifiers)
3. [Delete contact identifier](https://docs.bird.com/api/contacts-api/api-reference/manage-contact-identifiers/delete-contact-identifier)