Build an omnichannel OTP verification flow

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1. Workflow Overview

How it works • Receives user identity data from multiple channels (WhatsApp, Telegram, email). • Generates and stores secure one time passwords (OTP). • Validates OTP codes against Postgres records...

Best for

Support Chatbot automation workflows
AI Chatbot automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.webhook, n8n-nodes-base.if, n8n-nodes-base.stickynote, n8n-nodes-base.postgres, n8n-nodes-base.emailsend, n8n-nodes-base.code, 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 Yenire.

Original n8n.io source

1.1 Workflow description

Title: Build an omnichannel OTP verification flow
Workflow name: Build an omnichannel OTP verification flow

How it works

• Receives user identity data from multiple channels (WhatsApp, Telegram, email). • Generates and stores secure one-time passwords (OTP). • Validates OTP codes against Postgres records. • Centralizes user identity across channels. • Maintains session continuity for onboarding and verification.

Set up steps

• Import the workflow into n8n. • Configure Postgres or Supabase credentials. • Download and create the required database tables in Supabase. • Connect messaging channel credentials. • Define OTP expiration and validation rules. • Test using sample user verification scenarios.

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 - Webhook

Type / Role: n8n-nodes-base.webhook - webhook
Config choices: Version 2.1

Block 2 - If

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2.3

Block 3 - Sticky Note

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

Block 4 - Sticky Note1

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

Block 5 - Execute a SQL query

Type / Role: n8n-nodes-base.postgres - postgres
Config choices: Version 2.6

Block 6 - If1

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2.3

Block 7 - waiting_for_otp

Type / Role: n8n-nodes-base.postgres - postgres
Config choices: Version 2.6

Block 8 - If2- extracted_email

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2.3

Block 9 - Send email

Type / Role: n8n-nodes-base.emailSend - emailSend
Config choices: Version 2.1

Block 10 - If2

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2.3

Block 11 - Execute a SQL query1

Type / Role: n8n-nodes-base.postgres - postgres
Config choices: Version 2.6

Block 12 - Execute a SQL query2

Type / Role: n8n-nodes-base.postgres - postgres
Config choices: Version 2.6

Block 13 - IF_resend_otp

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2.3

Block 14 - Execute a SQL query3

Type / Role: n8n-nodes-base.postgres - postgres
Config choices: Version 2.6

Block 15 - Execute a SQL query5

Type / Role: n8n-nodes-base.postgres - postgres
Config choices: Version 2.6

Block 16 - If4

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2.3

Block 17 - IF_step- waiting_otp

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2.3

Block 18 - If email en session

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2.3

Block 19 - Upsert user_channel

Type / Role: n8n-nodes-base.postgres - postgres
Config choices: Version 2.6

Block 20 - Universal normalization

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

Block 21 - Check if the channel already exists

Type / Role: n8n-nodes-base.postgres - postgres
Config choices: Version 2.6

Block 22 - Channel already verified

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

Block 23 - Search onboarding_session

Type / Role: n8n-nodes-base.postgres - postgres
Config choices: Version 2.6

Block 24 - Extract email

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

Showing the first 24 of 45 workflow blocks. Download the JSON for the full node graph.

3. Summary Table

Workflow	Build an omnichannel OTP verification flow
Complexity	advanced
Nodes	45
Categories	Support Chatbot, AI Chatbot
Author	Yenire
Published	20 Mar 2026

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/14209/14209.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 Support Chatbot workflows AI Chatbot workflows

Frequently asked questions

What does Build an omnichannel OTP verification flow 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 Support Chatbot, AI Chatbot use case.

Yenire

2 workflows

Nodes

n8n-nodes-base.webhook n8n-nodes-base.if n8n-nodes-base.stickynote n8n-nodes-base.postgres n8n-nodes-base.emailsend n8n-nodes-base.code n8n-nodes-base.set

Complexity

advanced

Published 20 Mar 2026

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/14209/14209.json

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Build an omnichannel OTP verification flow

Workflow preview

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Webhook

Block 2 - If

Block 3 - Sticky Note

Block 4 - Sticky Note1

Block 5 - Execute a SQL query

Block 6 - If1

Block 7 - waiting_for_otp

Block 8 - If2- extracted_email

Block 9 - Send email

Block 10 - If2

Block 11 - Execute a SQL query1

Block 12 - Execute a SQL query2

Block 13 - IF_resend_otp

Block 14 - Execute a SQL query3

Block 15 - Execute a SQL query5

Block 16 - If4

Block 17 - IF_step- waiting_otp

Block 18 - If email en session

Block 19 - Upsert user_channel

Block 20 - Universal normalization

Block 21 - Check if the channel already exists

Block 22 - Channel already verified

Block 23 - Search onboarding_session

Block 24 - Extract email

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