post_to_bluesky

io.github.hermoso-ai/hermoso · Verify this server

Publish a post to Bluesky as the connected account. Text up to 300 characters — Bluesky ALSO caps a post at 3000 UTF-8 bytes, so an emoji-heavy post can be under 300 characters and still be refused; Hermoso checks both before spending the round trip and says which limit and by how much. MEDIA: either up to 4 images (imageUrls + altText) OR one MP4 video (videoUrl + videoAlt), never both — a Bluesky post record carries a single embed and images and video are two different embed types. Video is MP4 only, up to 300MB at Bluesky's end (Hermoso can fetch up to 150MB from a URL), with optional WebVTT caption tracks; the aspect ratio is measured from the file. Bluesky requires a CONFIRMED EMAIL on the account before it will process any video — if it is unconfirmed you get a refusal saying so, and reconnecting will not help. Links in the text are made clickable automatically. LINK CARDS: Bluesky does NOT scrape links, so a URL posted bare renders as plain blue text — the client composing the post has to build the card. Hermoso builds one AUTOMATICALLY when the post has a URL and NO media: it fetches the page, uses its title/description and uploads its image as the card thumbnail. Pass linkCard:false to suppress it, or linkCard:{uri,title,description,thumbUrl} to control it (give both title and description and the page is not fetched at all). A POST CARRIES ONE EMBED, so a card and images/video cannot both ride: if you pass linkCard explicitly ALONGSIDE media the call is REFUSED by name rather than silently dropping one, and if the URL was merely in the text the MEDIA WINS and the reply says the card was skipped (the link stays clickable either way). Returns the post's public bsky.app URL. Connect at Settings ▸ Connectors ▸ Bluesky with a handle and an APP PASSWORD.