Use Zapier's "Webhooks by Zapier" or HTTP step to call letspost.it's REST API. New row in Sheets, new email, new RSS item — pick the trigger, ship the post.
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Setup
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Pick a trigger (Sheets, Airtable, RSS, anything). Add a "Webhooks by Zapier → POST" step.
URL: https://api.letspost.it/v1/posts. Headers: Authorization: Bearer lp_live_... Body: post fields. Map trigger data to fields.
{
"platforms": ["instagram", "tiktok", "youtube"],
"caption": "{{trigger.title}}",
"mediaUrl": "{{trigger.video_url}}",
"scheduledAt": "{{trigger.publish_at}}"
}What you can do
Mark a row as ready in your Google Sheet → Zapier fires → post lands on schedule.
Track your content calendar in Airtable; Zapier publishes on the date column.
New blog post in your RSS feed → auto-draft for X, LinkedIn, and Threads.
FAQ
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