Automatically verify lead email addresses with Hunter.io

Checks every lead email in your spreadsheet for validity and writes the results back automatically.

How the work actually flows

A straight line. Runs once per each lead email.

Pattern: Sequence (1) ยท Multiple Instances with a priori Design-Time Knowledge (13)

flowchart TD trig(["daily schedule runs"]):::trigtime s0[("read new leads")]:::store s1["filter valid email addresses"]:::task s2[["verify each email address"]]:::mi s3[("write verification results back")]:::store trig --> s0 s0 --> s1 s1 -->|"one per each lead email"| s2 s2 --> s3 out[/"sheet updated with verification status"/]:::out pay{{"cleaner list before outreach"}}:::pay s3 --> out out --> pay classDef task fill:#e7f6fe,stroke:#34b8f0,color:#2c2a29 classDef svc fill:#f6f8fa,stroke:#7c8795,color:#2c2a29 classDef mi fill:#e7f6fe,stroke:#0079a8,color:#2c2a29,stroke-width:2px classDef human fill:#fff,stroke:#0079a8,color:#0079a8 classDef store fill:#f6f8fa,stroke:#0079a8,color:#2c2a29 classDef trig fill:#00a4eb,stroke:#0079a8,color:#fff,font-weight:bold classDef trigtime fill:#00a4eb,stroke:#0079a8,color:#fff,font-weight:bold classDef trigdata fill:#8ad4f5,stroke:#0079a8,color:#06314c,font-weight:bold classDef gate fill:#fff,stroke:#e8a23d,color:#6b4708,font-weight:bold classDef out fill:#1f9d6b,stroke:#167a53,color:#fff,font-weight:bold classDef pay fill:#06314c,stroke:#021f33,color:#fff
Starts itA stepRuns once per itemA record or sheetResultPayoff
Build size
Standard

A mid-size build with several tools working together.

Business functions
Email AutomationSpreadsheet & Database Ops
Connects
Google SheetsHunter.io

The problem it solves

You know a chunk of your lead list bounces or goes nowhere, but checking each address by hand takes forever. Sending campaigns to bad addresses wastes money and hurts your sender reputation. You need to know which leads are worth pursuing before you reach out.

Who it fits

A sales or marketing team that keeps leads in a spreadsheet and wants clean lists before outreach.

How it works

  1. Runs automatically once a day on a schedule
  2. Reads new leads from your Google Sheet
  3. Skips blank or clearly broken email addresses
  4. Checks each remaining address with Hunter.io for validity and risk
  5. Writes the verified status and confidence score back into a results sheet
What you get

A list you can trust before you hit send

Every lead email on your list gets checked for validity so your team knows which contacts are worth reaching out to.

What you get

An updated Google Sheet showing which lead emails are valid, invalid, or risky.

What you need

A Google account and a Hunter.io account with an API key.

We can build this. But should you?

The hard question is not how to build it. It is whether this is the right thing to build first.

That is what a Fractional Chief AI Officer figures out with you, before anyone writes a line of code.

Let's Talk Strategy

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