Salesforce Apex Invocable Methods - Part 3: Screen Flow + Callout Demo | Real API Example
🚀 *Salesforce Apex Invocable Methods - Part 3* is here!
In this intermediate Apex session, we build a *real-world Screen Flow* that calls an *external REST API* using an *Invocable Method* and a previously created **Callout Utility**. The challenge? Let users enter multiple country names and return full details like region, capital, Google Maps URL, etc. — all inside the flow using an Apex callout!
We walk through:
✅ Reviewing the API in Postman and the Callout Utility in Apex
✅ Building an Invocable Method that calls the API
✅ Designing a Screen Flow to collect country names and show results
✅ Answering community questions on Invocable Method categories, sub-categories, and Flow UI design
💡 Great practical example combining Apex, Callouts, and Flows!
🧠 **Level**: Intermediate
👀 Coming Up:
👉 Watch out for a *short upcoming video* showing how *Winter ’26* lets you eliminate the *Transform element* by using *Apex-defined variables directly in Data Tables* inside Screen Flows — a big simplification!
👉 Next full session: We’ll explore how to use *Invocable Methods* from **Prompt Templates**. Don’t miss it!
📂 GitHub Source Code:
🔗 https://github.com/CodeWithSally/Code...
📺 Watch Part 1: • Salesforce Apex: Invocable Methods Part 1 ...
📺 Watch Part 2: • Salesforce Apex Invocable Methods - Part 2...
📺 Full Intermediate Series Playlist: • Learn Salesforce Apex with Sally | Interme...
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⏱️ *Timestamps*
00:00 Welcome & Channel Overview
02:17 Recap of Part 1 & 2
03:58 Challenge Overview & Screen Flow Plan
09:51 Postman Demo of the API + Callout Utility Review
15:31 Building the Invocable Method (with Q&A)
34:30 Building the Screen Flow + Fixing Apex Issues
56:22 Testing Screen Flow on Homepage
57:14 Winter ’26 Heads Up: Apex-Defined Variables in Data Tables
59:12 Q&A: Invocable Method Categories & Sub-Categories
1:01:31 Q&A: Designing the UI for Flow
1:09:00 Session Wrap-Up & What’s Next
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🌐 Also check out:
Yalla Salesforce: / @yallasalesforce
Agentforce Now: https://developer.salesforce.com/agen...
#Salesforce #Apex #InvocableMethod #SalesforceFlow #ScreenFlow #Callout #RESTAPI #SalesforceDeveloper #CodeWithSally #salesforcetutorial
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