# Bluecore Documentation

> Documentation for Bluecore

## Guides
- [Rate limiting](https://developers.bluecore.com/docs/rate-limiting.md)
- [Status codes](https://developers.bluecore.com/docs/error-codes.md)
- [Query parameters](https://developers.bluecore.com/docs/query-parameters.md)
- [Email address](https://developers.bluecore.com/docs/email-address.md)

## API Reference
- [Authentication](https://developers.bluecore.com/reference/authn.md)
- [Get Access Token](https://developers.bluecore.com/reference/authn_getaccesstoken.md)
- [Customer Profile](https://developers.bluecore.com/reference/profile.md)
- [Retrieve Customer Profile](https://developers.bluecore.com/reference/profile_get.md)
- [Create/update Customer Profile](https://developers.bluecore.com/reference/profile_createorupdate.md)
- [External direct send campaign](https://developers.bluecore.com/reference/direct_send_campaign.md)
- [Create direct send campaign](https://developers.bluecore.com/reference/post_direct_send_campaign.md)
- [Send direct message](https://developers.bluecore.com/reference/direct_send_send.md)
- [Transactional](https://developers.bluecore.com/reference/transactional.md)
- [Retrieve transactional message status](https://developers.bluecore.com/reference/transactional_get.md)
- [Send transactional message](https://developers.bluecore.com/reference/transactional_send.md)
- [Transactional message statuses](https://developers.bluecore.com/reference/transactional-message-statuses.md)
- [Eligibility](https://developers.bluecore.com/reference/eligibility-1.md)
- [Retrieve Eligibility Status](https://developers.bluecore.com/reference/eligibility_get-1.md): Retrieve one customer's <Glossary>Eligibility</Glossary> status by submitting a unique identifier.
- [Update Eligibility Status](https://developers.bluecore.com/reference/eligibility_update-1.md): Use this API to update one customer's <Glossary>eligibility</Glossary> status

## Changelog
- [July 2025](https://developers.bluecore.com/changelog/july-2025.md)