AppLink Fundamentals II: Advanced AppLink Integrations – Automation & AI

Summary

Heroku AppLink lets connected Heroku applications extend Salesforce through Data Cloud, Flow, Apex, and Agentforce, bringing external logic, real-time data processing, and automation into Salesforce orgs. It uses an OpenAPI YAML or JSON specification, including x-sfdc metadata for authentication and permissions, to generate strongly typed Apex classes, Flow External Service definitions, Agent Actions, and related Connected App and Permission Set configurations. Developers can invoke services synchronously or asynchronously from Apex, use operations as no-code Flow actions, and configure Agentforce to call endpoints for specialized processing; callbacks support longer-running work. AppLink uses User Mode authentication by default, while administrator-controlled Permission Sets can temporarily elevate access during execution without changing a user’s permanent permissions.

Takeaways

1. 1

   The OpenAPI specification drives automatic service discovery and generates strongly typed Apex classes, Flow actions, Agent Actions, Connected Apps, and Permission Set configurations.

2. 2

   Apex supports synchronous calls and asynchronous callback workflows; callbacks are intended for processing that exceeds Apex governor limits or could otherwise block the Salesforce interface.

3. 3

   User Mode authentication preserves the triggering user’s permissions by default, while Permission Sets can grant temporary, administrator-controlled elevated access during Heroku execution.