Verify Email

Give it an email address, find out whether it is valid and deliverable.

What it does

• Checks whether an email address is valid and deliverable.
• Runs waterfall verification across multiple providers, in sequence.
• Stops at the first provider that returns a verdict. You are charged once per address, not once per provider tried.
• Takes the address only — no name, no company, no LinkedIn URL.

It checks an address you already have. It does not find one — use find_work_email or find_personal_email for that.

Parameters

How to use it

Verify jane@stripe.com

Verify every email in this CSV. Return the same rows with a deliverability
column, and put anything that fails in a separate list.

Find work emails for these LinkedIn URLs, verify each one, and drop anything
that isn't deliverable.

Example prompts

Best prompting practices

• Verify right before you send, not right after you build. Addresses go stale as people change jobs.
• Ask for a split, not a report. “Clean list and risky list” is directly usable; a paragraph of commentary is not.
• Chain it, do not fold it in. Finding and verifying are two tools with two costs. Ask for both explicitly.
• Batch it. At 0.3 credits an address this is the cheapest hygiene step you can run before a campaign.
• Do not verify guesses. Verifying a pattern you invented tells you the pattern exists, not that the person is behind it.

Output

{
  "email": "jane@stripe.com",
  "valid": true,
  "deliverable": true
}

Credits and limits

0.3 credits per address. Run check_credits (free) before verifying a large list.

Related tools

Next steps

• All MCP tools — the full catalogue with credit costs
• AI for Sales Reps — workflows that chain this tool into a list build

Keep learning

Two courses take these tools past the reference page — clustered by GTM job, then chained into workflows.