Free trial
Archive loading and outline shaping are free, with payment taken inside the conversation only after you have reviewed the outline. There is no time-limited trial of the full manuscript.
Learn moreProsed
Turn your newsletters, posts, and notes into a publish-ready book.
Beginner
What is Prosed?
Prosed is an AI book generator tool that turns your newsletters, posts, and notes into a publish-ready book. Prosed assembles your existing newsletters, blog posts, podcast transcripts and notes into a full nonfiction manuscript inside ChatGPT, Claude or another MCP-capable assistant.
Prosed is a book assembly service that takes writing you have already published and turns it into a manuscript. It is built for people with an archive rather than a blank page: Substack and newsletter writers sitting on hundreds of issues, bloggers with years of long-form posts, podcasters whose episodes can be transcribed, and subject experts who have never published a book. The premise is that the chapters already exist, scattered across your back catalogue, and the work left is editorial assembly rather than drafting. Prosed runs as a connector rather than a standalone editor. You paste one address into an assistant that speaks MCP, such as ChatGPT, Claude, Cursor, Windsurf or Zed, and sign in once inside the conversation. From there you name your sources (a Substack, a blog, a podcast, transcripts, files) and Prosed pulls the full archive in rather than a sample. You can then ask what the archive is actually about, including whether there is enough material to sustain a book. Outline work happens conversationally: chapters get moved, cut and renamed until the structure holds. The assembly itself runs through a pipeline called The Inkwell, which the company describes as modelled on patterns from bestselling nonfiction. Chapters are woven from your own sentences, with short bridges written only where two pieces of writing do not meet cleanly. Every bridge is marked in a Source Map, so you can see which lines are yours and which are connective tissue. A reviewer named Typo flags grammar, voice, flow and cohesion issues, each note linked to a specific passage, and a private portal holds each chapter in a reading view where you comment, accept or reject suggestions and request revisions. You leave with a PDF and a DOCX. The honest constraint is scope. Prosed handles nonfiction only for now, so memoir, business, self-help and essays are in and fiction is not. It also refuses to start without existing material, which rules out anyone arriving with just an idea. Within that narrow lane it is sharper than prompting a general chatbot, because the output is a structured manuscript with a revision trail rather than a text blob, and cheaper than the ghostwriting route by an order of magnitude.
How do you use Prosed?
1Connect Prosed to your assistant
Copy the Prosed connector address and paste it into ChatGPT, Claude, Cursor, Windsurf, Zed or any other assistant that supports MCP connectors. Sign in once inside the conversation and everything afterwards happens there.2Bring your archive across
Tell Prosed where you write or record, such as your Substack, blog, podcast or a folder of files. It pulls the material in and reads the whole archive rather than a sample of it.3Ask what book is in the archive
Before shaping anything, ask Prosed what your body of work is actually about. It will tell you honestly, including when there is not yet enough material for a book. This stage costs nothing.4Shape the outline in conversation
Move chapters, cut them, rename them and reorder until the structure reads correctly. The outline stage is also free and is the real test of whether you have a book.5Review the assembled chapters
Once you pay for the book, Prosed assembles each chapter from your own sentences and runs Typo's editorial notes. Use the private portal to comment, accept or reject suggestions and request revisions.6Export the PDF and DOCX
Turn on the Source Map to check which lines are yours and which are bridges, revise as often as you like, then take away a print-ready PDF and a DOCX. You own the book outright.
Pros and cons
Pros
- Assembles a full manuscript from content you have already published, so no new drafting is requiredAI
- Source Map colour-codes your words against the bridges Prosed adds, with the company claiming over 90% original textAI
- Outline building and archive review are free, so you learn whether a book exists before payingAI
- One-time $49 per book rather than a subscription, with PDF and DOCX includedAI
- Runs inside assistants you already use through MCP, with no separate app to installAI
Cons
- Nonfiction only: self-help, memoir, business and essays, with fiction still on the roadmapAI
- Requires a substantial existing archive, so an idea alone cannot get startedAI
- Quality depends heavily on how much coherent material your back catalogue containsAI
- The connector setup assumes you already use an MCP-capable assistant and are comfortable adding oneAI
- Editorial judgement is delegated to an automated reviewer, which will not replace a human developmental editorAI
How much does Prosed cost?
Pricing
$49 one time per book, with no subscription. A second book later is a second $49. Loading the archive and shaping the outline are free, and payment happens inside the conversation once you have seen the outline. The manuscript, voice analysis, Source Map, revisions, PDF and DOCX are all included.
Learn moreSupport
Support runs through an on-site contact form and a direct email address, with a stated reply window of within 24 hours. A walkthrough can also be requested by email before connecting anything.
Integrations
Works as an MCP connector inside assistants that support custom connectors, including ChatGPT, Claude, Cursor, Windsurf and Zed. Source material can be pulled from Substack, blogs, podcasts, transcripts and files you provide.
Learn moreFeatures
Prosed pulls in a full archive from Substack, blogs, podcasts, transcripts and files, then builds a manuscript from your existing sentences through a multi-stage pipeline called The Inkwell. A voice profile is drawn from your writing, a reviewer called Typo scores grammar, voice, flow and cohesion with notes tied to exact passages, and the Source Map marks which lines are yours against added bridges. A private portal holds every chapter version for comment and revision.
Frequently asked questions about Prosed
How much does Prosed cost?
$49 one time per book, with no subscription. A second book later is a second $49. Loading the archive and shaping the outline are free, and payment happens inside the conversation once you have seen the outline. The manuscript, voice analysis, Source Map, revisions, PDF and DOCX are all included.Does Prosed offer a free trial?
Archive loading and outline shaping are free, with payment taken inside the conversation only after you have reviewed the outline. There is no time-limited trial of the full manuscript.How do you use Prosed?
The walkthrough on this page covers 6 steps: 1. Connect Prosed to your assistant 2. Bring your archive across 3. Ask what book is in the archive 4. Shape the outline in conversation 5. Review the assembled chapters 6. Export the PDF and DOCX.What platforms does Prosed support?
Prosed is available on Web App.What does Prosed integrate with?
Works as an MCP connector inside assistants that support custom connectors, including ChatGPT, Claude, Cursor, Windsurf and Zed. Source material can be pulled from Substack, blogs, podcasts, transcripts and files you provide.What are the limitations of Prosed?
Nonfiction only: self-help, memoir, business and essays, with fiction still on the roadmap. Requires a substantial existing archive, so an idea alone cannot get started. Quality depends heavily on how much coherent material your back catalogue contains.
Status
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Added10/21/2026
Platforms
Web App
Pricing
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