BillionVerifyPeak

Handle Spanish-speaking vet clinic bookings with GPT-4o, Sheets, Calendar and Gmail

Pull contacts, verify each address with BillionVerify, and continue to Peak — only deliverable addresses get through.

Download n8n workflow (JSON)Install the n8n node

Why verify before the send

Sending to invalid, risky, catch-all, or disposable addresses spikes your bounce rate and erodes sender reputation. A verification gate before the Peak step removes that risk automatically — only deliverable addresses continue, the rest are flagged.

The workflow

BillionVerify — verification sits right before the send.

+13

n8n steps

Verify Email (BillionVerify)

n8n steps

Node by node

1
When chat message receivedTrigger· n8n
Starts the workflow — on a schedule, a webhook, or manually while you test.
2
Update eventSource· n8n
Provides or transforms the contact data flowing through the workflow.
3
Delete eventSource· n8n
Provides or transforms the contact data flowing through the workflow.
4
Create eventSource· n8n
Provides or transforms the contact data flowing through the workflow.
5
Simple MemorySource· n8n
Provides or transforms the contact data flowing through the workflow.
6
OpenRouter Chat ModelSource· n8n
Provides or transforms the contact data flowing through the workflow.
7
Get eventsSource· n8n
Provides or transforms the contact data flowing through the workflow.
8
New client?Source· n8n
Provides or transforms the contact data flowing through the workflow.
9
Add clientSource· n8n
Provides or transforms the contact data flowing through the workflow.
10
OpenAI Chat ModelSource· n8n
Provides or transforms the contact data flowing through the workflow.
11
Send a message in GmailSource· n8n
Provides or transforms the contact data flowing through the workflow.
12
Workflow Error HandlerTrigger· n8n
Starts the workflow — on a schedule, a webhook, or manually while you test.
13
NormalizeSource· n8n
Provides or transforms the contact data flowing through the workflow.
14
Verify Email (BillionVerify)Verify· billionverify
The BillionVerify node verifies the address — status (valid / invalid / risky / catch-all / role / disposable), is_deliverable, and a confidence score — before anything is sent.
15
MaríaSource· n8n
Provides or transforms the contact data flowing through the workflow.
16
IF deliverableLogic· n8n
Branches on the verification result: only deliverable addresses continue to the send; the rest are skipped and flagged.
17
Notify: Workflow ErrorSend· n8n
Sends only to verified, deliverable addresses. Swap in your own provider node if you send elsewhere.

Workflow JSON

Copy or download this workflow, then import it in n8n (Workflows → Import from File / Paste). Install the BillionVerify community node first, then add your API key credential.

verify-emails-in-peak.json28 KB · n8n workflow

Download

When to use this

Cleaning a list before a Peak send or sync.
Protecting Peak deliverability and sender reputation.
Keeping bounce rates low so your sending is never throttled.

Three ways to connect

n8n node

Install the BillionVerify community node and drop it into this workflow.

Integrately

1-Click connect BillionVerify with 1500+ apps, no code.

REST API

Call the verification API directly from any stack.

FAQ

Why verify before sending in Peak?

Verifying first keeps your bounce rate low, which protects your sender reputation and your results.

How do I import this workflow?

Download the JSON, then in n8n go to Workflows → Import from File (or paste it). Install the BillionVerify community node and add your API key credential.

What happens to risky or catch-all addresses?

They are routed to the false branch and excluded from the send. You decide whether to retry, review, or drop them.

Add verification to your workflow

Create a free account, grab your API key, and stop bounces before they happen.

Get started free