Crono email verification with BillionVerify
Crono is a sales engagement platform that helps revenue teams automate outreach sequences and manage pipeline activity. Connecting Crono with BillionVerify through n8n or the REST API lets you validate prospect email addresses before they enter any sequence, protecting deliverability and keeping your sender domain healthy.
Why verify before the send
Outreach sequences live or die by inbox placement. A single campaign to a list riddled with invalid or role addresses can spike bounce rates and trigger spam filters. BillionVerify scrubs invalid, disposable, and catch-all addresses from your Crono prospect lists before the first touchpoint, so your sequences reach real people every time.
Ready-to-use n8n workflow
Import this workflow into n8n — it verifies every address with BillionVerify before Crono sends, so only deliverable contacts are emailed. Install the BillionVerify community node first, then add your API key.
{
"name": "Verify emails before sending in Crono + BillionVerify",
"nodes": [
{
"parameters": {},
"type": "n8n-nodes-base.manualTrigger",
"typeVersion": 1,
"position": [
240,
300
],
"name": "When clicking ‘Test workflow’"
},
{
"parameters": {
"assignments": {
"assignments": [
{
"id": "email-field",
"name": "email",
"value": "jane@example.com",
"type": "string"
}
]
},
"options": {}
},
"type": "n8n-nodes-base.set",
"typeVersion": 3.4,
"position": [
460,
300
],
"name": "Get contacts"
},
{
"parameters": {
"sendTo": "={{ $json.email }}",
"subject": "Message for Crono contacts",
"message": "Replace this Gmail send with your Crono node — only deliverable, verified contacts reach it.",
"options": {}
},
"type": "n8n-nodes-base.gmail",
"typeVersion": 2.1,
"position": [
900,
300
],
"name": "Send email",
"webhookId": "",
"credentials": {
"gmailOAuth2": {
"id": "",
"name": "Gmail account"
}
}
},
{
"parameters": {
"operation": "verify",
"email": "={{ $json.email }}",
"additionalOptions": {}
},
"type": "n8n-nodes-billionverify.billionVerify",
"typeVersion": 1,
"position": [
540,
300
],
"name": "Verify Email (BillionVerify)",
"credentials": {
"billionVerifyApi": {
"id": "",
"name": "BillionVerify account"
}
}
},
{
"parameters": {
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "loose"
},
"combinator": "and",
"conditions": [
{
"id": "is-deliverable",
"leftValue": "={{ $json.is_deliverable }}",
"rightValue": "",
"operator": {
"type": "boolean",
"operation": "true",
"singleValue": true
}
}
]
}
},
"type": "n8n-nodes-base.if",
"typeVersion": 2,
"position": [
720,
300
],
"name": "IF deliverable"
}
],
"connections": {
"When clicking ‘Test workflow’": {
"main": [
[
{
"node": "Get contacts",
"type": "main",
"index": 0
}
]
]
},
"Get contacts": {
"main": [
[
{
"node": "Verify Email (BillionVerify)",
"type": "main",
"index": 0
}
]
]
},
"Verify Email (BillionVerify)": {
"main": [
[
{
"node": "IF deliverable",
"type": "main",
"index": 0
}
]
]
},
"IF deliverable": {
"main": [
[
{
"node": "Send email",
"type": "main",
"index": 0
}
],
[]
]
}
},
"settings": {
"executionOrder": "v1"
}
}Workflow templates with Crono
Ready-to-use workflows that verify emails before Crono sends.
How it works
- 1
Add the BillionVerify n8n community node to your workspace, or connect via the REST API.
- 2
Set up an n8n trigger that fires when new prospects are added to Crono or imported from an external source.
- 3
Pass each prospect's email address to BillionVerify for real-time verification.
- 4
Filter out invalid, disposable, role, and catch-all addresses based on BillionVerify's response.
- 5
Enroll only verified prospects into Crono sequences to maximize deliverability and reply rates.
When to use this
Pre-sequence prospect validation
Before enrolling a new prospect batch into a Crono sequence, route the email addresses through BillionVerify. Only confirmed valid addresses proceed to outreach, cutting bounce rates and preserving your domain reputation.
Imported lead hygiene
When leads are imported from CSV files, scraped databases, or third-party enrichment tools, their email quality is unknown. Verify them with BillionVerify on import so your Crono sequences start with clean, deliverable contacts.
FAQ
How does email verification improve reply rates in sales sequences?
Invalid addresses never reply and inflate your bounce rate, which damages inbox placement for all subsequent sends. Removing them means more messages land in real inboxes, directly improving the chances of a response.
Should I verify addresses that come from enrichment tools?
Yes. Enrichment tools aggregate data from many sources and cannot guarantee every address is currently active. Running those addresses through BillionVerify before sequencing adds a final accuracy check.
What happens to catch-all addresses?
Catch-all domains accept email for any local part, so delivery cannot be confirmed. BillionVerify flags these so you can decide whether to include them in outreach or treat them with lower priority.
Can I use BillionVerify without a developer on my team?
Yes. The Integrately 1-click integration connects BillionVerify to your workflows without writing code, and the n8n community node requires only node configuration rather than custom API calls.
Verify emails in Crono
Create a free account, grab your API key, and stop bounces before they happen.
Get started free