Supabase storage tutorial: Upload, fetch, sign & list files

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Important notice

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

1. Workflow Overview

Learn Supabase Storage Fundamentals with n8n This template demonstrates how to integrate Supabase Storage with n8n for uploading, fetching, generating temporary signed URLs, and listing files. It’s...

Best for

File Management automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.httprequest, n8n-nodes-base.formtrigger, n8n-nodes-base.manualtrigger, 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 Alok Kumar.

Original n8n.io source

1.1 Workflow description

Title: Supabase storage tutorial: Upload, fetch, sign & list files
Workflow name: Supabase storage tutorial: Upload, fetch, sign & list files

Learn Supabase Storage Fundamentals with n8n

This template demonstrates how to integrate Supabase Storage with n8n for uploading, fetching, generating temporary signed URLs, and listing files. It’s a beginner-friendly workflow that helps you understand how to connect Supabase’s storage API with n8n automation.

Who it’s for

Developers and teams new to Supabase who want a hands-on learning workflow.
Anyone looking to automate file uploads and retrieval from Supabase Storage.
Educators or technical teams teaching Supabase fundamentals with practical demos.

How it works

Upload File – A user uploads a file through an n8n form, which gets stored in a Supabase storage bucket.
Fetch File – Retrieve files by providing their filename.
Temporary Access – Generate signed URLs with custom expiry for secure file sharing.
List Objects – View all stored files in the chosen Supabase bucket.

How to set up

Create a Supabase account and set up a project.
Create a bucket in Supabase (e.g., test-n8n).
Get your Project URL and Anon Key from Supabase.
In n8n, create a Supabase API Credential using your keys.
Import this workflow and connect it with your credentials.
Run the forms to test file upload, retrieval, and listing.

Requirements

A Supabase project with storage enabled.
A configured Supabase API Credential in n8n.

Customization

Change the bucket name (test-n8n) to your own.
Adjust signed URL expiry times for temporary file access.
Replace Supabase with another S3-compatible storage if needed.
Extend the workflow with notifications (Slack, Email) after file upload.

📝 Lessons Included

Lesson 1 – Upload file to Supabase storage.
Lesson 2 – Fetch file from storage.
Lesson 3 – Create a temporary signed document with expiry.
Lesson 4 – List all items in Supabase storage.

🔑 Prerequisites

Supabase account + project.
Project URL and API Key (Anon).
Bucket created in Supabase.
Policy created to allow read/write access.
n8n with Supabase API credentials configured.

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 - fetch_file_to_review1

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

Block 2 - upload_to_supabase_storage

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

Block 3 - On form submission

Type / Role: n8n-nodes-base.formTrigger - formTrigger
Config choices: Version 2.2

Block 4 - On form submission1

Type / Role: n8n-nodes-base.formTrigger - formTrigger
Config choices: Version 2.2

Block 5 - On form submission2

Type / Role: n8n-nodes-base.formTrigger - formTrigger
Config choices: Version 2.2

Block 6 - get_sign_file_for_temp_access

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

Block 7 - list_all_the_object

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

Block 8 - When clicking ‘Execute workflow’

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

Block 9 - Sticky Note

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

Block 10 - Sticky Note2

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

Block 11 - Sticky Note3

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

Block 12 - Sticky Note4

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

Block 13 - Sticky Note5

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

Block 14 - Sticky Note1

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

Block 15 - Sticky Note6

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

Block 16 - Sticky Note7

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

Block 17 - Sticky Note8

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

Block 18 - Sticky Note9

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

3. Summary Table

Workflow	Supabase storage tutorial: Upload, fetch, sign & list files
Complexity	advanced
Nodes	18
Categories	File Management
Author	Alok Kumar
Published	03 Sept 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/8228/8228.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 File Management workflows

Frequently asked questions

What does Supabase storage tutorial: Upload, fetch, sign & list files 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 File Management use case.

Alok Kumar

6 workflows

Nodes

n8n-nodes-base.httprequest n8n-nodes-base.formtrigger n8n-nodes-base.manualtrigger n8n-nodes-base.stickynote

Complexity

advanced

Published 03 Sept 2025

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/8228/8228.json

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Supabase storage tutorial: Upload, fetch, sign & list files

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

Learn Supabase Storage Fundamentals with n8n

Who it’s for

How it works

How to set up

Requirements

Customization

📝 Lessons Included

🔑 Prerequisites

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - fetch_file_to_review1

Block 2 - upload_to_supabase_storage

Block 3 - On form submission

Block 4 - On form submission1

Block 5 - On form submission2

Block 6 - get_sign_file_for_temp_access

Block 7 - list_all_the_object

Block 8 - When clicking ‘Execute workflow’

Block 9 - Sticky Note

Block 10 - Sticky Note2

Block 11 - Sticky Note3

Block 12 - Sticky Note4

Block 13 - Sticky Note5

Block 14 - Sticky Note1

Block 15 - Sticky Note6

Block 16 - Sticky Note7

Block 17 - Sticky Note8

Block 18 - Sticky Note9

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