Publish to LinkedIn
post_to_linkedinPublish a text post (with optional image) to your connected LinkedIn profile. Get explicit user approval before posting, and use an idempotency key to avoid duplicates on retries.
Instructions
Publish a post to the user’s connected LinkedIn profile — text, and optionally an image (pass its served URL as imageUrl). The image does NOT have to be something Hermoso generated: LinkedIn is served the bytes from us, so the URL must be Hermoso-hosted, and upload_file turns ANY file the user already has into exactly that. This PUBLISHES immediately and PUBLICLY — ALWAYS show the user the exact text and get an explicit yes BEFORE calling. Needs a connected LinkedIn account (Settings ▸ Connectors ▸ LinkedIn).
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| hook | No | WHAT ANGLE THIS POST IS BUILT ON — the single most valuable field here, and the only moment it can ever be recorded. post_performance groups on it to answer "which hooks work", and it needs 5 posts sharing ONE hook before it will call anything a winner, so REUSE THE SAME WORDING across a campaign instead of rephrasing it every time. Best of all, pass a hook id from list_hooks (e.g. "direct_callout", "mid_problem", "before_after") — those fold onto a stable key however they are spelled, so a whole brand accumulates evidence on one row. Your own wording is fine too; it just only groups when you repeat it exactly. Omitting it means this post can never vote on which hook works. | |
| text | Yes | the post text | |
| subject | No | WHAT THIS POST IS ABOUT — the product, feature, offer or theme (e.g. "winter coat", "free trial", "founder story"). The second grouping axis in post_performance. Same rule as hook: reuse the exact wording so posts about one subject land in one group. | |
| imageUrl | No | a Hermoso-hosted image URL to attach (≤12MB) — a Hermoso render, or ANY file of the user’s own put through upload_file first. An arbitrary external host is refused (we fetch the bytes ourselves). | |
| imageUrls | No | A CAROUSEL IS NOT AVAILABLE ON A PERSONAL PROFILE — LinkedIn's organic multi-image post publishes from a COMPANY PAGE. Passing several here is refused by name rather than posting slide 1; use post_to_linkedin_page instead. | |
| visibility | No | default PUBLIC | |
| allowDuplicate | No | post it even though an identical post was just made or attempted. Only pass this when the user genuinely wants the same thing posted twice, or when you have LOOKED at the account and confirmed a timed-out attempt did not land. | |
| idempotencyKey | No | SAFE RETRIES. Publishing can take minutes (a video upload, a carousel of ten slides) and a transport can time out while the post SUCCEEDS — retrying blind is how the same thing gets posted twice. Pass any stable string here and a repeat of the SAME publish returns the ORIGINAL post id instead of posting again (24h). You do not have to: an identical publish is auto-recognised for 10 minutes anyway. If a call times out or errors ambiguously, CALL AGAIN WITH THE SAME KEY — that is the safe move, and it will either report the original post or publish it for the first time. It never posts twice. |