Steps
- In Shopify admin, open Apps → Bloom.
- Go to Settings → Notify me → Klaviyo integration.
- Click Connect Klaviyo.
- Authorise Bloom in the Klaviyo window that opens.
- Choose the list new sign-ups are added to. Most stores use a dedicated list like Back in stock sign-ups.
- Click Save.
Connections made before v0.47.5 need reconnecting. A banner on Home and in Settings → Notify me prompts you - click Connect Klaviyo and sign-ups resume.
Next: set up the flow
Connecting Klaviyo means sign-ups will land in your list - but Klaviyo won’t send anything until you configure the back-in-stock flow. See Set up the back-in-stock flow.Legacy connection
Before one-click connect, stores pasted two values from Klaviyo by hand. The fields are still available under Settings → Notify me → Klaviyo integration if you need them.- Company ID - your Klaviyo site’s Public API Key (a short identifier, e.g.
AbCd12). Bloom uses it from the storefront to submit sign-ups. No private API key is required. - List ID - the Klaviyo list new sign-ups are added to.
Find your Company ID
- Open your Klaviyo account.
- Go to Settings → Account → API Keys.
- Copy the Public API Key - typically 6 characters.
QAcpv2in the example below.

Find your List ID
- In Klaviyo, go to Audience → Lists & Segments.
- Open (or create) the list you want Notify Me sign-ups added to.
- Click Settings on the list - the List ID is shown there (a 6-character code).

Paste both into Bloom
- In Shopify admin, open Apps → Bloom.
- Go to Settings → Notify me → Klaviyo integration.
- Paste your key into Company ID (Public API Key).
- Paste your list ID into List ID.
- Click Save.
