Proseify

Proseify — the book-writing engine for AI agents

Proseify is a hosted MCP (Model Context Protocol) server that turns Claude Code, Codex, Cursor, or any MCP client into a disciplined book-writing machine — grounded in real literature instead of generic model defaults.

Give it a one-line premise. It picks the right genre recipe, pulls model passages from a curated public-domain library, plans the outline, drafts chapter by chapter, and scores its own work. You get a manuscript you can actually edit, not 40 pages of "it was a dark and stormy night."

🔗 Website & key issuance: https://proseify.xyz

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Why genre-before-prose matters

Most "AI writes a book" tools generate immediately. The output reads the same way regardless of what you asked for — the same sentence lengths, the same dialogue rhythm, the same endings.

Proseify flips the order:

premise → genre recipe → corpus passages → outline → chapter drafts → scored revision

The genre recipe is derived from the actual tradition — pacing beats, dialogue ratio, sentence-length profile, how endings are handled. The agent reads it before touching prose. That single ordering decision is the difference between a horror book that reads like the gothic tradition and a horror book that reads like ChatGPT.

Tools exposed

Tool	What it does
list_genres	11 genres, growing library of books (theatre, horror, romance, adventure, literary, and more)
search_corpus	Full-text search across all chapters, with FTS5 syntax (quotes, AND/OR/NOT, wildcards)
get_genre_recipe	Pacing beats, dialogue ratio, and stylistic anchors derived from the tradition
get_style_references	Model passages from books matching a genre — the register you're aiming for
plan_book	Full chapter-by-chapter outline from a one-line premise
write_book	The one-shot flow: plan → draft → evaluate, all in one session
evaluate_book	Scores a drafted book against genre benchmarks so weak chapters get revised

…plus supporting tools for chapter retrieval and corpus metadata.

Setup (Claude Code, Codex, Cursor, and friends)

1. Get a key

Sign in at https://proseify.xyz (Google / GitHub / magic link), pick a plan. Monthly from $9, or one-time Founding Lifetime. Your key is issued the moment the purchase clears.

2. Connect the MCP server

{
  "mcpServers": {
    "proseify": {
      "type": "http",
      "url": "https://mcp.proseify.xyz/mcp",
      "headers": { "Authorization": "Bearer YOUR_KEY" }
    }
  }
}

(Use the client's native MCP config format for your agent — see the Agent SDK page for a filled-in block.)

3. Install the skill

npx skills add https://proseify.xyz --skill anti-prose-slop -y

The anti-prose-slop skill gives the agent the writing workflow — genre recipe first, corpus grounding, chapter discipline, and a per-chapter anti-slop editing pass — instead of just raw tool access.

4. Write

Tell the agent a premise:

"I want a gothic horror novel about a lighthouse keeper finding a body that shouldn't exist. 32 chapters. Budget 50,000 words."

The agent picks the right recipe, searches the corpus for register, plans, drafts, scores, and revises. You edit what it returns.

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The corpus

a growing library of books / 11 genres, drawn from Project Gutenberg and similar public-domain collections — all verified against their original headers, so there is no copyright ambiguity anywhere in the library. Commercial use of output built on it is safe.

A partial list: works from Austen, Stevenson, Hugo,conrad, Verne, the Brontës, Shelley, gothic masters, and more — selected, grouped by genre, and indexed for search.

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Why "anti-prose-slop"?

Because the failure mode of AI-written prose isn't bad grammar — models are word-perfect. It's sameness: "seemed to", "began to", stacked adverbs, repeated sentence constructions, filter words, dialogue-as-exposition, chapter openings that always start with weather. The skill that ships with Proseify has a concrete per-chapter checklist against each of these, and evaluate_book scores the result against genre norms so the agent can self-revise rather than ship its first pass.

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Pricing

Plan	Price	Requests
Starter	$9/mo	120 req/min
Pro	$19/mo	400 req/min
Studio	$49/mo	9999 req/min
Founding Lifetime	one-time	400 req/min, all genres

Cancel any time from your account (opens our payment provider's customer portal, signed in as you). See the refund policy for the 14-day money-back window.

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License

MIT — see LICENSE. The public-domain corpus texts themselves are public domain (mostly Project Gutenberg-sourced).

Links

• Site / sign-up: https://proseify.xyz
• Agent SDK (filled-in config for your key): https://proseify.xyz/agent
• Terms · Privacy · Refund policy — footer of every page on the site
• Support: [email protected]
• Published in the official MCP registry: io.github.Dionisselami/proseify-mcp