Marble gives your blog, changelog, or product updates a calm editorial home, then hands clean JSON to whatever website you already built. Writers work in a focused rich-text editor with headings, lists, code blocks, images, video, and embeds, while a readability score quietly grades each draft as it grows. Every post carries authors, one category, tags, a cover image, and typed custom fields, so a changelog entry and a long guide can share one predictable structure. Your frontend pulls sanitized HTML or Markdown through the REST API or typed SDK, filtering by category, tag, or search in a single request. Read-only public keys serve published posts safely, while scoped private keys unlock drafts and write access for the tools you trust. Uploads of images, video, audio, and documents land in a media library with alt text and dimensions, ready to embed anywhere. Signed webhooks announce every change to your site, Slack, or Discord with retries and a delivery log, and an MCP server lets AI agents search and draft content too. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.