Klaviyo List Hygiene Agent with Codex
One run per bounce means the bill is written by your list quality rather than by a schedule. A clean list barely registers, and a campaign that goes wrong is expensive on exactly the day you most want to hear about it. Codex moves fast through a tightly bounded job, which keeps the per-bounce figure small enough that a bad send reads as legible rather than alarming.
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 Codex
Preselected for this page — connect your Codex 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 Codex for this agent
Each bounce stays small
A profile read, a classification, sometimes a suppression, then a rate check. Keeping each one short is what makes a thousand of them survivable.
Bad sends cost in proportion
Five hundred bounces on a hundred thousand address campaign is five hundred short runs. That number was already costing you domain reputation before it was visible anywhere.
Before you fork
Will a thousand bounces at once hit Klaviyo's rate limits?
Each run makes a small number of profile and metric calls, and Klaviyo meters those per account, so a genuine flood can be throttled. That is worth planning for rather than fearing: the thing you need out of a flood is the spike message, which comes from one rate read, and individual suppressions can catch up behind it. If you send to very large lists, set the spike threshold low enough that the alert arrives early.
Run it with a different agent
Put Klaviyo List Hygiene Agent to work on Codex
Free to start. Guided setup, a test run against staged conversations, and it's live.