externalPost: true) and schedules it via the same pipeline as normal posts.externalPostUrl, content, scheduledTime, providerId (LinkedIn or LinkedIn Page). Pick providerId from POST /api/integrations/filter-integrations (integration id for a linkedin or linkedinPage connection).scheduledTime.curl --location 'https://app.highperformr.ai/api/v1/posts/external-linkedin-reply' \
--header 'x-api-key: <api-key>' \
--header 'Content-Type: application/json' \
--data '{
"externalPostUrl": "https://www.linkedin.com/feed/update/urn:li:activity:7444599297079345152/",
"content": "Good insights",
"scheduledTime": "2026-04-01T09:36:28.000Z",
"providerId": "CI4a2sLJJpFwXjNgNzpY"
}'{
"property1": "string",
"property2": "string"
}