Question: Is there a platform that allows me to create reusable templates for marketing materials and customize them with an API?

If you need a platform to build reusable templates for marketing materials and then customize them with an API, Bannerbear is a good option. The tool can automate the creation of visual content, like social media graphics, e-commerce banners and videos, and comes with a template editor and API so you can create content programmatically. Bannerbear also can be integrated with Zapier, Airtable and other services, so it's a good pick for marketers.

Another good option is Promtify, a ChatGPT template builder that offers a broad suite of tools to generate content. Promtify offers a range of default and community contributed templates, but you can also build your own and share them with others. With a REST API interface, you can also embed it into your business processes to automate content generation. The company plans to add Promts API and Promts Workflows in the coming months, too, so it's a good option for content marketers.

If you're specifically interested in landing pages and conversion optimization, Unbounce is a great option. It's got a drag-and-drop builder for customization without programming skills, AI copywriting and a lot of templates. Unbounce also has A/B testing tools and integration with common marketing tools, so you can optimize and improve your marketing campaigns. A 14-day free trial lets you try it out.