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Documentation Index

Fetch the complete documentation index at: https://loops.so/docs/llms.txt

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Content API endpoints are currently in an open alpha and are subject to change.
The email-messages command lets you view and edit the email message attached to a campaign. Email messages are created automatically when you create a campaign.

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get

Get an email message by ID, including its current content and contentRevisionId. 
loops email-messages get clx1234abc

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update

Update fields on a draft email message. The owning campaign must be in Draft status. 
loops email-messages update clx1234abc \
  --expected-revision-id rev_01h... \
  --subject "Welcome to Acme" \
  --preview-text "Here's how to get started" \
  --lmx-file ./email.lmx

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Concurrency control

Every update must include either --expected-revision-id or --force:
  • --expected-revision-id — pass the contentRevisionId from a prior email-messages get. The request is rejected with a conflict if the server’s revision has advanced, so you don’t overwrite a concurrent edit.
  • --force — fetch the current revision automatically and use it. This overwrites any concurrent edits.

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Setting content

Pass LMX inline with --lmx or from a file with --lmx-file: 
loops email-messages update clx1234abc \
  --force \
  --lmx-file ./email.lmx

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Flags

FlagShortDescription
--expected-revision-id-rLast-seen contentRevisionId from email-messages get. Mutually exclusive with --force.
--force-fFetch the current revision and use it (overwrites concurrent edits). Mutually exclusive with --expected-revision-id.
--subjectEmail subject
--preview-textEmail preview text
--from-nameSender display name
--from-emailSender username (the part before @ — the team’s sending domain is appended automatically)
--reply-toReply-to email address
--lmxLMX markup (inline). Mutually exclusive with --lmx-file.
--lmx-filePath to a file containing LMX markup. Mutually exclusive with --lmx.
At least one content flag (--subject, --preview-text, --from-name, --from-email, --reply-to, --lmx, or --lmx-file) must be provided.
Last modified on May 27, 2026