Integrate External Processes with n8n Workflow Using Webhook Callbacks

This workflow pattern is designed to handle pseudo-callbacks or triggers from external processes initiated by a primary workflow. It combines the input from these external processes with the ongoing workflow execution. The external system must pass context information, such as a resumeUrl, to rejoin the primary workflow. This setup is ideal for scenarios where an external process, like a Telegram conversation or web service, needs to provide input back to the workflow. Note that this pattern is not suitable for workflows handling multiple items, as only the first callback will resume the workflow.