BillionVerify1shot Api

Verify emails before sending in 1shot API

Pull contacts, verify each address with BillionVerify, and continue to 1shot API — 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 1shot API step removes that risk automatically — only deliverable addresses continue, the rest are flagged.

The workflow

BillionVerify — verification sits right before the send.

n8n steps

Verify Email (BillionVerify)

n8n steps

Node by node

1
When clicking ‘Test workflow’Trigger· n8n
Starts the workflow — on a schedule, a webhook, or manually while you test.
2
Get contactsSource· n8n
Provides or transforms the contact data flowing through the workflow.
3
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.
4
IF deliverableLogic· n8n
Branches on the verification result: only deliverable addresses continue to the send; the rest are skipped and flagged.
5
Send emailSend· 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-1shot-api.json

Download

{
  "name": "Verify emails before sending in 1shot API + 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 1shot API contacts",
        "message": "Replace this Gmail send with your 1shot API 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"
  }
}

When to use this

Cleaning a list before a 1shot API send or sync.
Protecting 1shot API 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 1shot API?

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