Fetch the public IP addresses of your n8n instance

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Important notice

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

1. Workflow Overview

Why If you need to use n8n to connect to service providers of yours, some of which happen to rely on firewall white listing as part of their access control, you'll need to determine or verify the p...

Best for

DevOps automation workflows
intermediate n8n builders looking for reusable templates

Tools used

n8n-nodes-base.httprequest, n8n-nodes-base.webhook, n8n-nodes-base.respondtowebhook, n8n-nodes-base.stickynote, n8n-nodes-base.aggregate, n8n-nodes-base.set

Source and attribution

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

Original n8n.io source

1.1 Workflow description

Title: Fetch the public IP addresses of your n8n instance
Workflow name: Fetch the public IP addresses of your n8n instance

Why

If you need to use n8n to connect to service providers of yours, some of which happen to rely on firewall white-listing as part of their access control, you'll need to determine or verify the public IP addresses of your n8n instance(s).

How does it work

The webhook, upon invocation, will use Http Request node to request public IP address information from ++api.ipify.org++ in json format, for 10 times, then aggregate results to an array.
- The reason to repeat, is to get all the potential public IP addresses of your n8n instance.
- Often than not, enterprises or network providers deploy at least a pair of gateway devices at the border for redundancy.
built-in array functions in a javascript expression are used to pluck all the values under 'ip' key, and to dedup to an array as response body.

How to set it up

import the workflow
set up your own header-auth credential
update the workflow to use the new credential
test or activate workflow as usual.

example invocation

$ curl -H "api-key: super-long-api-token" http://localhost:5678/webhook-test/4879bc79-d6f8-48df-bfe4-613366c7f399
["88.88.88.66", "88.88.88.88"]

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 - HTTP Request

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

Block 2 - Webhook

Type / Role: n8n-nodes-base.webhook - webhook
Config choices: Version 2

Block 3 - Respond to Webhook

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

Block 4 - Sticky Note

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

Block 5 - Aggregate

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

Block 6 - Repeat

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

3. Summary Table

Workflow	Fetch the public IP addresses of your n8n instance
Complexity	intermediate
Nodes	6
Categories	DevOps
Author	Ger Longstacks
Published	06 Jun 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/4750/4750.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 DevOps workflows

Frequently asked questions

What does Fetch the public IP addresses of your n8n instance 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 DevOps use case.

Ger Longstacks

2 workflows

Nodes

n8n-nodes-base.httprequest n8n-nodes-base.webhook n8n-nodes-base.respondtowebhook n8n-nodes-base.stickynote n8n-nodes-base.aggregate n8n-nodes-base.set

Complexity

intermediate

Published 06 Jun 2025

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/4750/4750.json

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Fetch the public IP addresses of your n8n instance

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

Why

How does it work

How to set it up

example invocation

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - HTTP Request

Block 2 - Webhook

Block 3 - Respond to Webhook

Block 4 - Sticky Note

Block 5 - Aggregate

Block 6 - Repeat

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