MailCheap is a newsletter app you host yourself that writes, sends, and publishes your issues while charging you only for the emails you actually send, not for subscribers who never open anything. Write in an editor with slash commands, images, and content boxes, or send Markdown and HTML emails through the API, then work through a pre-send review that flags subject, preview text, unsubscribe link, and sender problems first. Bring your audience with you: CSV exports from beehiiv, Substack, Mailchimp, Kit, MailerLite, Buttondown, Ghost, and EmailOctopus import with each reader's status and signup date intact. Imports clean themselves, dropping invalid, misspelled, duplicate, throwaway, and spam-trap addresses, and a server-wide never-email list keeps known bad addresses out of every future import, signup, and send. Sending protects your domain: new contacts receive issues in paced steps, sends pause when bounce or complaint rates climb, and Gmail spam rates are watched daily. Every issue becomes a page on your newsletter's website, with a signup form, author page, share images, and a sitemap. Run up to three newsletters per account, each with separate contacts and campaigns, and follow subscribers over time with open and click reports by inbox provider. AI agents can do anything the dashboard can through the MCP server, and scripts get the same reach through the REST API, with sending marked irreversible so agents ask first. 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.

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.