Klaviyo List Hygiene Agent with Claude Code
Suppression is the heaviest action available here, and that ceiling only means something if the agent keeps the difference between a mailbox that is full and an address that no longer exists. Claude Code does its thinking before the first action, which is the pause this template wants: read the profile history, classify from the receiving server's own wording, then decide whether anything happens at all.
Watch it work before it's live
Run a staged conversation — no account needed. The agent handles it for real while a simulated world answers its tool calls; nothing touches real accounts, and nothing is actually sent.
Bounce: August Restock Announcement
Hard bounce. 550 5.1.10 RESOLVER.ADR.RecipientNotFound, recipient not found by SMTP address lookup. First failure ever recorded for this address, which opened 23 of the last 30 sends and clicked a product link eight days ago. Account bounce rate today is 0.2 percent.
Set up in minutes
Using this template drops you into a guided setup. It asks exactly this, nothing else:
Connect Klaviyo
One sign-in. The agent acts through your account, scoped to what this template uses.
Connect Slack
One sign-in. The agent acts through your account, scoped to what this template uses.
Hygiene rules
Which bounces earn a suppression and which only get counted, how many soft failures in what window make a streak, the profile property that stores the reason, the bounce rate you treat as a spike, and the domains worth waking someone for.
Runs on Claude Code
Preselected for this page — connect your Claude Code account during setup, or switch to NoClick's built-in models with one click.
Watch it handle a test run
A staged conversation against a simulated world — then it’s live.
Why Claude Code for this agent
Soft failures get counted
A 452 over quota adds to a streak and nothing more. Acting on the first temporary failure is how a paying customer quietly leaves your list, and that instruction has to hold on every run.
Handing back when it is us
Many domains failing inside an hour, or a response naming your sending domain, means suppress nothing and post what you saw. Recognising that boundary is a decision rather than a rule lookup.
Before you fork
How bad can a wrong suppression get?
You lift it in Klaviyo in a couple of clicks, with the profile's orders, opens and properties untouched. Deleting profiles, unsubscribing anyone and editing consent are not operations the workflow holds, so the ceiling on a mistake is genuinely low. The reason to care about instruction quality is not damage, it is the quiet loss of a good address nobody notices.
Run it with a different agent
Put Klaviyo List Hygiene Agent to work on Claude Code
Free to start. Guided setup, a test run against staged conversations, and it's live.