Publish an HTML web page to yapp.page and get a live shareable URL. (To host an existing PDF, image, or ZIP file AS-IS — like a manual upload — use `publish_file` instead; do NOT convert a PDF into HTML.) LARGE FILES: if the HTML document is big (roughly >100 KB, or it contains a long minified array/blob), DO NOT paste it inline as `html` — it will be truncated/corrupted because the content has to be reproduced as model output. Instead host the file at a public https URL and pass `htmlUrl` — yapp downloads the document itself, byte-for-byte. Use `html` only for small pages. ATTACHED / UN-EMBEDDABLE FILES: if the user attached a file (or it is too large to reproduce) and you do NOT have a public URL for it, call publish_page with NO `html` and NO `htmlUrl`. You get back an `uploadUrl` — share it with the user so they drop the file in their browser. This is the reliable path for any file you cannot pass inline. BUNDLING ASSETS (images, CSS, JS, fonts): pass `assets` — an array where each entry has a `name` (the relative filename inside the page) plus either `base64` (raw bytes of the file) OR `url` (yapp.page will fetch and bundle for you). Reference each asset from your HTML by its `name`. EXAMPLES # Single HTML page publish_page({ html: "

Hello

" }) # Page with one inline image (you have the bytes) publish_page({ html: '

Hi

', assets: [{ name: "hero.jpg", base64: "" }] }) # Page with multiple images + a stylesheet (relative paths preserved) publish_page({ html: '

', assets: [ { name: "style.css", base64: "..." }, { name: "img/logo.png", base64: "..." }, { name: "img/hero.jpg", base64: "..." } ] }) # Page that uses an image already hosted somewhere — yapp will fetch it publish_page({ html: '

', assets: [{ name: "hero.jpg", url: "https://picsum.photos/seed/y/1200/800" }] }) Each asset name must be a safe relative path (letters/digits/dot/dash/underscore/slash, no ".."). FORMS — IMPORTANT: yapp.page auto-captures any ` No `action` attribute needed. yapp.page intercepts the submission, stores it in the database, and the owner sees submissions at /messages/ in their dashboard. Field names you choose become JSON keys. Max 16 KB per submission. Use the `list_submissions` tool later to read entries. OWNERSHIP: Pages you publish via MCP are owned by your account — you can `update_page`, `delete_page`, and `list_submissions` for them without an editKey.

Publish a webpage to a live URL, straight from your AI.

Publish a webpage to a live URL, straight from your AI.