---
title: "Jazzboard — Think together, live"
description: "A private multiplayer architecture canvas that people and their own agents can operate together through browser-native WebMCP."
doc_version: "1.0.0"
last_updated: "2026-08-26"
---

# Jazzboard — Think together, live

Jazzboard is a shared architecture canvas where people and participant-owned agents diagram and edit together in real time. The visual tldraw canvas and the browser-native WebMCP tools operate one authoritative semantic room model.

## Agent entry point

Open the live site in a WebMCP-capable browser context. On each page, discover the page's WebMCP tools before attempting visual browser automation. Registration occurs after the client loads and, inside a room, after the signed guest session is authorized; wait for the tool list to appear or change.

The landing page exposes five tools for creating a private room, joining by exact code, and working with only this browser's private recent-room references. A participant room exposes 33 read and mutation tools. A spectator room exposes exactly eight passive read tools.

## Private collaboration

Jazzboard has no public room directory, global search, code autocomplete, or room enumeration. Joining requires the exact four-digit room code. Authorization comes from a signed HttpOnly guest-session cookie and server-side room membership, not from the code alone. Recent-room references never leave the current browser and are re-authorized before use.

## Semantic canvas

Agents read stable object and diagram IDs, explicit node classifications, exact geometry, semantic connector relationships, revisions, and attribution. Efficient operations include bounded queries, neighborhood reads, deterministic layout, and all-or-nothing multi-object transactions with temporary references. First-class diagrams retain title, description, type, tags, membership, bounds, revisions, and creator/editor attribution.

## Sitemap

- [Live application](https://jazzboard-rho.vercel.app/)
- [Agent guide](https://jazzboard-rho.vercel.app/agent-guide.md)
- [WebMCP reference](https://jazzboard-rho.vercel.app/webmcp.md)
- [Authorization and privacy](https://jazzboard-rho.vercel.app/privacy.md)
- [Glossary](https://jazzboard-rho.vercel.app/glossary.md)
- [Installable Jazzboard skill](https://jazzboard-rho.vercel.app/skills/jazzboard-webmcp/SKILL.md)
- [Full Markdown sitemap](https://jazzboard-rho.vercel.app/sitemap.md)