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API Reference
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Update Campaign Message

patch
https://a.klaviyo.com/api/campaign-messages/

Update a campaign message

Rate limits:
Burst: 10/s
Steady: 150/m

Scopes:
campaigns:write

Path Params
string
required

The message ID to be retrieved

Query Params
fields[campaign-message]
array of strings

For more information please visit https://developers.klaviyo.com/en/v2026-04-15/reference/api-overview#sparse-fieldsets

fields[campaign-message]
Body Params

Update a message and return it

data
object
required
Headers
string
required
Defaults to 2026-04-15

API endpoint revision (format: YYYY-MM-DD[.suffix])

Responses

Updated over 1 year ago

Language
Credentials
Header
LoadingLoading…
Response
Choose an example:
application/vnd.api+json

Updated over 1 year ago

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