Run multiple tasks in parallel with asynchronous processing and webhooks

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Important notice

This workflow is provided as-is. Please review and test before using in production.

1. Workflow Overview

n8n Asynchronous Workflow with Wait Node POC This template contains a two part workflow designed to demonstrate a proof of concept for asynchronous and parallel execution of tasks in n8n. Purpose T...

Best for

Engineering automation workflows
intermediate n8n builders looking for reusable templates

Tools used

n8n-nodes-base.manualtrigger, n8n-nodes-base.executeworkflowtrigger, n8n-nodes-base.wait, n8n-nodes-base.executeworkflow, n8n-nodes-base.httprequest, n8n-nodes-base.merge, n8n-nodes-base.summarize, n8n-nodes-base.stickynote

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Viktor Klepikovskyi.

Original n8n.io source

1.1 Workflow description

Title: Run multiple tasks in parallel with asynchronous processing and webhooks
Workflow name: Run multiple tasks in parallel with asynchronous processing and webhooks

n8n Asynchronous Workflow with Wait Node POC

This template contains a two-part workflow designed to demonstrate a proof-of-concept for asynchronous and parallel execution of tasks in n8n.

Purpose

The purpose of this template is to showcase how you can run multiple long-running tasks simultaneously without blocking your main workflow. It utilizes the "Wait For Sub-workflow Completion" option and the "Wait" node to effectively manage concurrent execution and collect results from sub-workflows via webhooks. This pattern is ideal for use cases involving batch processing or any scenario where a workflow needs to trigger multiple independent tasks and wait for all of them to report back.

Setup Instructions

Import: Import both the "Main Orchestrator" and "Asynchronous Worker" workflows into your n8n instance.
Link Workflows: In the "Main Orchestrator" workflow, ensure the "Execute Workflow" node is correctly configured to call the "Asynchronous Worker" workflow. You can select it by its name from the dropdown menu.
Configure: The template is pre-configured to run two parallel tasks with different wait durations to simulate a real-world scenario. You can adjust the parameters on the "Execute Workflow" node to test different wait times.
Execution: Execute the "Main Orchestrator" workflow. You will see the workflow pause at the "Wait" nodes while the "Asynchronous Worker" workflows run in the background. Once they complete, they will call back via the webhook, allowing the main workflow to resume and summarize the results.

For a detailed walkthrough of how this template works and an explanation of the underlying concepts, please read the full blog post here

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - Start

Type / Role: n8n-nodes-base.manualTrigger - manualTrigger
Config choices: Version 1

Block 2 - Call Entry Point

Type / Role: n8n-nodes-base.executeWorkflowTrigger - executeWorkflowTrigger
Config choices: Version 1.1

Block 3 - Wait Seconds

Type / Role: n8n-nodes-base.wait - wait
Config choices: Version 1.1

Block 4 - Call 1

Type / Role: n8n-nodes-base.executeWorkflow - executeWorkflow
Config choices: Version 1.2

Block 5 - Request Webhook

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 6 - Wait for Webhook 1

Type / Role: n8n-nodes-base.wait - wait
Config choices: Version 1.1

Block 7 - Wait for Webhook 2

Type / Role: n8n-nodes-base.wait - wait
Config choices: Version 1.1

Block 8 - Wait 1 Second

Type / Role: n8n-nodes-base.wait - wait
Config choices: Version 1.1

Block 9 - Call 2

Type / Role: n8n-nodes-base.executeWorkflow - executeWorkflow
Config choices: Version 1.2

Block 10 - Merge

Type / Role: n8n-nodes-base.merge - merge
Config choices: Version 3.2

Block 11 - Sum

Type / Role: n8n-nodes-base.summarize - summarize
Config choices: Version 1.1

Block 12 - Sticky Note

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

3. Summary Table

Workflow	Run multiple tasks in parallel with asynchronous processing and webhooks
Complexity	intermediate
Nodes	12
Categories	Engineering
Author	Viktor Klepikovskyi
Published	14 Sept 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/8578/8578.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Engineering workflows

Frequently asked questions

What does Run multiple tasks in parallel with asynchronous processing and webhooks do?

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Engineering use case.

Viktor Klepikovskyi

15 workflows

Nodes

n8n-nodes-base.manualtrigger n8n-nodes-base.executeworkflowtrigger n8n-nodes-base.wait n8n-nodes-base.executeworkflow n8n-nodes-base.httprequest n8n-nodes-base.merge n8n-nodes-base.summarize n8n-nodes-base.stickynote

Complexity

intermediate

Published 14 Sept 2025

Likes 0

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Install path: /data/workflows/8578/8578.json

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Run multiple tasks in parallel with asynchronous processing and webhooks

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

n8n Asynchronous Workflow with Wait Node POC

Purpose

Setup Instructions

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Start

Block 2 - Call Entry Point

Block 3 - Wait Seconds

Block 4 - Call 1

Block 5 - Request Webhook

Block 6 - Wait for Webhook 1

Block 7 - Wait for Webhook 2

Block 8 - Wait 1 Second

Block 9 - Call 2

Block 10 - Merge

Block 11 - Sum

Block 12 - Sticky Note

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions