![\"image\"](\"https:\/\/devblogs.microsoft.com\/microsoft365dev\/wp-content\/uploads\/sites\/73\/2024\/04\/image-1.jpeg\")
<\/p>\nIn this April 2024 update of Teams Toolkit for Visual Studio Code, we\u2019ve added improvements to build API message extensions with an auth-protected API, new getting started experiences for building intelligent chat bots, and features to build add-ins for Word, Excel, and PowerPoint, and more.<\/p>\n
Teams Toolkit supports two types of API authentication protection in your API based Message extension apps:<\/p>\n
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Teams App Test Tool helps developers to debug and test apps in a web-based environment Microsoft Teams-like features without requiring network tunnels or a Microsoft 365 account. In this version we\u2019ve added support for search-based, action-based, and link unfurling Message extensions.<\/p>\n
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Running your Teams apps with these capabilities with the Test Tool shows a familiar interface that makes iterating on your app simple and fast.<\/p>\n
![\"image\"](\"https:\/\/devblogs.microsoft.com\/microsoft365dev\/wp-content\/uploads\/sites\/73\/2024\/04\/image-3.jpeg\")
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The new Custom copilot template helps you get started with building an AI-powered chatbot that can understand natural language and retrieve custom data to answer domain-specific questions using Retrieval Augmentation Generation (RAG).<\/p>\n
When creating the Custom copilot app, you can select “Chat with your data” and then select the desired data source.<\/p>\n
![\"image\"](\"https:\/\/devblogs.microsoft.com\/microsoft365dev\/wp-content\/uploads\/sites\/73\/2024\/04\/image-4.jpeg\")
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There are four kinds of data source for you to choose:<\/p>\n
![\"image\"](\"https:\/\/devblogs.microsoft.com\/microsoft365dev\/wp-content\/uploads\/sites\/73\/2024\/04\/image-5.jpeg\")
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![\"image\"](\"https:\/\/devblogs.microsoft.com\/microsoft365dev\/wp-content\/uploads\/sites\/73\/2024\/04\/image-6.jpeg\")
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Teams Toolkit now supports Microsoft Word, Excel, or PowerPoint JavaScript add-in development and includes features for checking dependencies, running and debugging add-ins, managing lifecycle, providing feedback, and more.<\/p>\n
We\u2019ve smoothed the experience of creating Entra ID client secrets with features that let you customize the `clientSecretExpireDays` and `clientSecretDescription` parameters in teamsapp.yml.<\/p>\n
![\"image\"](\"https:\/\/devblogs.microsoft.com\/microsoft365dev\/wp-content\/uploads\/sites\/73\/2024\/04\/image-7.jpeg\")
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We’d really appreciate your early feedback! Download the latest prerelease of Teams Toolkit<\/a> and explore these new features and improvements today!<\/p>\n Remember, your feedback is valuable in shaping the future of Teams Toolkit. Share your thoughts and suggestions with us on GitHub<\/a>, and let\u2019s build together!<\/p>\n Follow us on X (Twitter) \/ @Microsoft365Dev<\/a>, LinkedIn<\/a>, and subscribe to our YouTube channel<\/a> to stay up to date on the latest developer news and announcements.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":" Learn about the latest updates including added improvements to build API Message extensions with an auth-protected API.<\/p>\n","protected":false},"author":69083,"featured_media":20703,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[128],"tags":[23,44],"class_list":["post-20693","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-microsoft-teams","tag-teams-toolkit","tag-visual-studio-code"],"acf":[],"blog_post_summary":" Learn about the latest updates including added improvements to build API Message extensions with an auth-protected API.<\/p>\n","_links":{"self":[{"href":"https:\/\/devblogs.microsoft.com\/microsoft365dev\/wp-json\/wp\/v2\/posts\/20693","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/devblogs.microsoft.com\/microsoft365dev\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/devblogs.microsoft.com\/microsoft365dev\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/microsoft365dev\/wp-json\/wp\/v2\/users\/69083"}],"replies":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/microsoft365dev\/wp-json\/wp\/v2\/comments?post=20693"}],"version-history":[{"count":0,"href":"https:\/\/devblogs.microsoft.com\/microsoft365dev\/wp-json\/wp\/v2\/posts\/20693\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/microsoft365dev\/wp-json\/wp\/v2\/media\/20703"}],"wp:attachment":[{"href":"https:\/\/devblogs.microsoft.com\/microsoft365dev\/wp-json\/wp\/v2\/media?parent=20693"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/microsoft365dev\/wp-json\/wp\/v2\/categories?post=20693"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/microsoft365dev\/wp-json\/wp\/v2\/tags?post=20693"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}