Your Library
Your books work here.
Upload your PDFs — rulebooks, adventures, supplements. Search them during play. Reference any page from anywhere in the app. Your books stay yours. No re-purchasing. No platform lock-in.
PDF Upload
Drag and drop rulebooks, adventures, and supplements. Any PDF works.
Full-Text Search
Find any passage across your entire collection in seconds.
In-Session Reference
Open any page without leaving the game. Pin pages for quick access.
AI-Readable
Your AI assistant reads your books automatically. No extra setup.
At the Table
Everything a session needs.
Maps with tokens and drawing tools. 3D dice that feel right. Real-time chat with your party. Encounter tracking that stays out of the way. Sit down and play.
Maps & Tokens
Upload a map, place tokens, draw. Drag to move, scroll to zoom.
3D Dice
Physics-based rolling. Any notation. Results go straight to chat.
Chat
Messages, dice rolls, and game events in one real-time thread.
Encounters
Initiative tracking, turn order, and combat management.
Campaign Prep
All your prep in one place.
Notes, rollable tables, and character sheets — organized by game. Everything you need between sessions, accessible during them.
Notes
Rich text editing with tags, groups, and full-text search.
Rollable Tables
Random encounters, loot, NPCs. Custom formulas. Roll from anywhere.
Character Sheets
Built-in templates or build your own with the SDK.
Game Organization
Everything sorted by campaign. Switch between games instantly.
System Agnostic
Any game. Any system.
Polyhedral doesn't enforce rules. The GM is the GM. No system-specific modules to install. No compatibility matrices to check.
AI Tools
Works with your AI.
Connect your AI assistant via MCP. It reads your books, rolls dice, manages notes, and runs encounters. Use it for prep, at the table, or not at all.
AI is a tool in the box — not the box itself.
For Builders
Your Game, Extended.
Builder Access is $5/month for the SDK, API, MCP, CLI, and webhooks. Build a custom character sheet for your system, connect your own tools, and wire up automations. AI-powered actions use prepaid credits.
SDK
Build custom character sheets in JSX. Full component library.
REST API
Full CRUD for all game content. Standard HTTP, JSON responses.
MCP Server
Connect AI assistants to your game data. Read books, roll dice, manage notes.
CLI
Manage sheet templates from your terminal. Push, pull, publish.
Webhooks
Real-time event streams. React to dice rolls, messages, turn changes.
Works Everywhere
Browser-based. No downloads.
Mac, Windows, Linux, tablets. Open a link and play. No installs. No setup. No accounts required for players.
Players join with a link — no sign-up needed.