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Klaviyo integration

Keep every Klaviyo list bounce-free.

Verify profiles in any list or segment before your next flow fires. Connect once, verify any list in minutes, and let Verifyre write the results back where your team already works.

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Connect Klaviyo Setup guide

What it does

Verifyre and Klaviyo, together.

Reads your lists

Verifyre lists every list in your Klaviyo account and streams its contacts page by page, so even a list of hundreds of thousands never has to be exported.

Verifies with a real handshake

Each address goes through syntax, DNS, disposable and role checks and an SMTP conversation with its own mail server, with per-domain politeness so no provider is hammered.

Writes the verdict back

Undeliverable contacts are tagged, unsubscribed or suppressed, your choice, inside Klaviyo, after you have reviewed the results.

Setup guide

Set up Klaviyo in 4 steps.

You will need: a Verifyre account (free) and your Klaviyo private api key.

  1. Create an API key in Klaviyo

    In Klaviyo go to Settings, then Account, then API keys (create a private key) and create a key named Verifyre. Copy it; you will paste it once and never see it again on our side (it is encrypted with AES-256-GCM at rest).

  2. Connect it in Verifyre

    Sign in, open Integrations, choose Klaviyo and paste the key. Verifyre tests it immediately and shows the account it belongs to. A wrong key says exactly what Klaviyo answered.

  3. Verify a list

    Pick a list from the list, confirm the credit estimate (one credit per unique address, duplicates are free) and start. Watch the counts fill in live; you get an email when the job is done.

  4. Push results back

    From the finished list, choose the write-back action. Verifyre applies it only to undeliverable contacts by default; risky contacts (catch-all domains, role accounts) are left for you to decide on with the exported CSV.

Where exactly the private api key lives

In Klaviyo open Settings, then Account, then API keys, and click Create Private API Key. Give it Read access to Lists and Profiles and Full access to Subscriptions, then copy the key (it starts with pk_).

Write-back

What gets written back to Klaviyo.

Verification only reads. Writing results back is a separate step you trigger after reviewing the counts, and nothing is ever deleted without your say-so.

  • Undeliverable profiles unsubscribed from the list through Klaviyo's bulk subscription job, so flows stop firing at dead mailboxes.
  • Or profiles suppressed account-wide, which keeps the record and its history but guarantees no send ever goes out to it.

Klaviyo FAQ

Klaviyo questions

Visit the help centre
Does Verifyre store my Klaviyo contacts?
Contacts are held only for the duration of the job and the result rows you can download; the credentials are encrypted and can be disconnected at any time, which deletes them.
How many credits does a sync use?
One credit per unique, well-formed address in the list. Duplicates, syntax failures and addresses verified in the last 24 hours are free.
Will it unsubscribe contacts without asking?
No. Verification only reads. Writing back is a separate step you trigger from the finished list, and you choose which action to apply.
Which scopes does the private key need?
Read access to Lists and Profiles, and Full access to Subscriptions. Verifyre never needs Campaigns, Flows or Metrics.

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Connect Klaviyo in two minutes.

100 free verifications on signup, no card. Keep them for your first sync.

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