Securely call Google Cloud Run APIs with service account auth (main-workflow)

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Important notice

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

1. Workflow Overview

Who it’s for? Anyone who wants a simple, secure way to call a Google Cloud Run endpoint from n8n—without exposing it publicly. People who want a cheap/free tier way to run custom API logic without ...

Best for

DevOps automation workflows
Multimodal AI automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.stickynote, n8n-nodes-base.executeworkflow, n8n-nodes-base.manualtrigger, n8n-nodes-base.merge, n8n-nodes-base.set, n8n-nodes-base.splitout, n8n-nodes-base.httprequest, n8n-nodes-base.splitinbatches

Source and attribution

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

Original n8n.io source

1.1 Workflow description

Title: Securely call Google Cloud Run APIs with service account auth (main-workflow)
Workflow name: Securely call Google Cloud Run APIs with service account auth (main-workflow)

Who it’s for?

Anyone who wants a simple, secure way to call a Google Cloud Run endpoint from n8n—without exposing it publicly.

People who want a cheap/free-tier way to run custom API logic without hosting n8n or spinning up servers. Example: you’ve got scraping code that needs specific system/python libs—build it into a Dockerfile on Cloud Run, then call it as a secure endpoint from n8n.

How it works

This is a conjunctive workflow: the main workflow calls Service Auth (sub-workflow) to get a Google ID token, merges that auth with your context, then calls your Cloud Run URL with Authorization: Bearer <id_token>. Works great for single calls or looping over items.

How to set up

General instructions below—see my detailed guide for more info:

Build a Secure Google Cloud Run API, Then Call It from n8n (Free Tier)

Setup:

Create a Cloud Run service and enable Require authentication (Cloud IAM).
Create a Google Service Account and grant Cloud Run Invoker on that service.
In n8n, import the workflows and update the Vars node (service_url, optional service_path).
Create a JWT (PEM) credential from your service account key, then run.
Make sure to read the sticky notes in the workflows—they contain helpful pointers and optional configurations.

Requirements

Cloud Run service URL (auth required)
Google Service Account with Cloud Run Invoker
Private key JSON fields downloaded from Service Account | needed to generate JWT credentials

How to customize

Change the HTTP method/path/body in Cloud Run Request, or drop the Service Auth (sub-workflow) into other workflows to reuse the same auth pattern.

More details

Full write-up (minimal + modular flows), screenshots, and more:

Build a Secure Google Cloud Run API, Then Call It from n8n (Free Tier) — by Marco Cassar

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 - Sticky Note2

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

Block 2 - Sticky Note8

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

Block 3 - Check Auth

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

Block 4 - Execute

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

Block 5 - Collect Context Example

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

Block 6 - Sticky Note5

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

Block 7 - Set Example Context Fields

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

Block 8 - Split Out

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

Block 9 - Sticky Note9

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

Block 10 - Sticky Note6

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

Block 11 - Sticky Note

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

Block 12 - Get Auth

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

Block 13 - Sticky Note1

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

Block 14 - Cloud Run Request

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

Block 15 - Loop Over Items

Type / Role: n8n-nodes-base.splitInBatches - splitInBatches
Config choices: Version 3

Block 16 - Sticky Note4

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

Block 17 - Vars

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

Block 18 - Done

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

3. Summary Table

Workflow	Securely call Google Cloud Run APIs with service account auth (main-workflow)
Complexity	advanced
Nodes	18
Categories	DevOps, Multimodal AI
Author	Marco Cassar
Published	19 Aug 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/7568/7568.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 Multimodal AI workflows

Frequently asked questions

What does Securely call Google Cloud Run APIs with service account auth (main-workflow) 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, Multimodal AI use case.

Marco Cassar

3 workflows

Nodes

n8n-nodes-base.stickynote n8n-nodes-base.executeworkflow n8n-nodes-base.manualtrigger n8n-nodes-base.merge n8n-nodes-base.set n8n-nodes-base.splitout n8n-nodes-base.httprequest n8n-nodes-base.splitinbatches

Complexity

advanced

Published 19 Aug 2025

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/7568/7568.json

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Securely call Google Cloud Run APIs with service account auth (main-workflow)

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

Who it’s for?

How it works

How to set up

Requirements

How to customize

More details

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Sticky Note2

Block 2 - Sticky Note8

Block 3 - Check Auth

Block 4 - Execute

Block 5 - Collect Context Example

Block 6 - Sticky Note5

Block 7 - Set Example Context Fields

Block 8 - Split Out

Block 9 - Sticky Note9

Block 10 - Sticky Note6

Block 11 - Sticky Note

Block 12 - Get Auth

Block 13 - Sticky Note1

Block 14 - Cloud Run Request

Block 15 - Loop Over Items

Block 16 - Sticky Note4

Block 17 - Vars

Block 18 - Done

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