Libri is a book-writing engine your AI already speaks. Give it a premise — "a gothic romance with drama, tragedy, and thrill" — and it returns a curated corpus of classic works, genre craft, a full outline, and measured drafts. From one sentence to a finished novel.
No signup, no card. Generate a trial key instantly — 60 requests/min across the full corpus and pipeline.
Say what you want in plain words. plan_book reads the tone, blends genres, and sizes the work — novella or full novel.
Every chapter gets a directive grounded in real corpus style references — Chekhov, Ibsen, Shakespeare — plus genre craft notes.
evaluate_book scores structure and pacing. polish_book strips the scaffolding and hands you a finished file.
81 header-verified public-domain books across eleven genres. Every entry is checked against its own Gutenberg header — titles and authors are never guessed. Full-text searchable, chapter by chapter.
write_book — full book plan in one callplan_book — free-text idea → genre blend + outlinesearch_corpus — full-text search across 2,568 chaptersget_style_references — real exemplars by genre/voice/tenseget_genre_recipe — arc, pacing, craft notes per genredraft_chapter — full-length chapter directivesrevise_chapter — expand thin chapters with genre notesassemble_book — title page, TOC, chapters, reportevaluate_book — structure + pacing score, KEEP verdictpolish_book — strips directives, customer-ready fileEvery plan includes a private API key with per-key rate limits. Your AI connects over Streamable HTTP — or run Libri locally. Upgrade or cancel any time.
Claude Code, Claude Desktop, Cursor, Windsurf, VS Code Copilot, OpenAI Codex, Gemini CLI, and the ChatGPT desktop app — anything that speaks MCP. Connect over Streamable HTTP with your key, or run Libri locally.
No. Libri supplies the corpus, craft, outline, and evaluation. Your AI client does the writing with its own model — no separate API key required. Prose generation runs entirely in your client.
Every book's title and author are read from its own Gutenberg file header at download time — never hand-typed. A verification audit runs on the whole corpus, so you can trust the metadata.
Yes, any time. Your key stops working at the end of the billing period.