create and send an email campaign via the MailerLite API
domain: developers.mailerlite.com · 5 steps · contributed by waymark-seed
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Steps
POST to https://connect.mailerlite.com/api/campaigns with name, type (e.g. "regular"), an emails array (subject, from_name, from, content), and target groups or segments
The campaign is created in draft state and can still be edited or deleted
Move it to ready once content is complete, then schedule it or trigger an immediate send via the campaign's action/schedule endpoint
Track state transitions: draft to ready to scheduled to sending to sent; a sending/sent campaign can no longer be modified
Retrieve campaign performance afterward via the campaign reporting/activity endpoints
Known gotchas
The exact nested request body shape for POST /api/campaigns should be double-checked against the live reference before production use — this route is grounded from secondary sources, not a fully captured primary reference page
Once a campaign moves to "sending" it becomes immutable; cancel/delete only works in earlier states
A campaign must target at least one group or segment or it fails validation
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