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> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.bigcommerce.com/llms.txt.
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## API Update and Announcements for September 23, 2021

![](/_fern-files/_img/af0d0d4b067a16aa280b6d4eda40e05a3b327a9be54fa8b43d4a8cd3fcbe867b.webp)

**API**

* Determine the checkout that best suits your needs by reviewing the checkout options described in the new checkout customizability article.

**Email Templates**

* Added Email Templates Code Examples to demonstrate how to update text, add a button, change logo size, and change font size in the recently updated transactional emails.

**Developer Blog**

* [GraphQL Authentication on BigCommerce](https://medium.com/bigcommerce-developer-blog/graphql-authentication-on-bigcommerce-26bb870db931?source=collection_home---4------6-----------------------)

* [Employee Stoplight: Issac Buckland](https://medium.com/bigcommerce-developer-blog/employee-spotlight-isaac-buckland-a01817cb4f98?source=collection_home---4------5-----------------------)

* [Automate your BigCommerce Theme Configuration for Different Environments](https://medium.com/bigcommerce-developer-blog/automate-your-bigcommerce-theme-configuration-for-different-environments-1972fbf4b29a?source=collection_home---4------3-----------------------)

* [BigCommerce Employee Stoplight: Patrick Puente](https://medium.com/bigcommerce-developer-blog/bigcommerce-employee-spotlight-patrick-puente-e77b408719dd?source=collection_home---4------0-----------------------)