Concept modeling · humans + agents

The whiteboard where your AI agent holds a pen.

Koncept is a concept-modeling and architecture-diagramming tool with a built-in MCP server. Point Claude, or any MCP client, at your workspace and watch it draw. Every edit lands live on the canvas your team already has open.

Free plan · no card · MCP included on every tier

Meet your new modeling teammate.

Mint an API key, give it a persona, and your agent joins the workspace as itself: "Claude · reviewer", not a script hiding behind your name. It crafts models with you on the same live canvas, opens a thread when it needs your call, and resolves it when the work lands.

thread · on node "Invoice"

Claude · reviewer via MCP

Payment was folded into Invoice. I split it out and wired Invoice "settled by" Payment. Keep it?

You

Yes. Good catch.

✓ resolved by Claude · thread_resolve

33 sharp tools, grouped by job.

A complete drawing surface at the core, plus dedicated sets for the vocabulary, the real cases, and the conversation. One command to connect:

 connect claude code
claude mcp add --transport http koncept \
  https://<your-deployment>.convex.site/mcp \
  --header "Authorization: Bearer <api-key>"

core drawing · 18

  • model_create
  • node_create
  • edge_create
  • bulk_apply
  • auto_layout
  • model_render
  • model_validate
  • +11

dictionary · 5

  • dictionary_search
  • dictionary_update
  • +3

scenarios · 6

  • scenario_create
  • scenario_activate
  • +4

threads · 4

  • comment_post
  • thread_resolve
  • +2

Everything a shared vocabulary needs.

Concept models keep a team honest about what words mean. Koncept gives the vocabulary a home, a review process, and concrete examples.

dictionary

One name, everywhere

A workspace-wide dictionary of concepts. Rename an entry once and it propagates to every model that uses it, with "used in N models" rollups so you know the blast radius.

scenarios

Ground the abstract

Attach real cases like "ACME's order #1042" to a model, with example values per concept. Scenarios live beside the diagram, so real data never pollutes the picture. They even work on frozen models.

architecture views

Systems, not just concepts

A second model type with a seven-shape catalog (databases, external systems, actors, decisions) plus z-ordering. For service maps and data-flow drawings in the same workspace.

lifecycle

Draft → review → validated

Put models and dictionary entries through review with picked reviewers and approval thresholds. Optionally require branch-based "pull requests" for changes to validated models.

real-time

Multiplayer by default

Live co-editing over a Yjs log on Convex. Humans and agents share one edit stream, so everyone sees everything as it happens, cursors to comments.

reviews & comments

Discuss on the diagram

Threads anchor to a model, a node, or an edge. Agents post and resolve comments through the same API. A "Claude reviewer" persona is one API-key option away.

Simple plans, honest caps.

Every plan, including Free, ships the full canvas, architecture views, scenarios, and the MCP server.

Free

$0

  • 3 concept models
  • Solo workspace
  • MCP server + API keys
  • Scenarios & architecture views
Start free

Enterprise

Custom

  • Unlimited models & members
  • Everything in Team · 50
  • Talk to us about your needs
Contact us

Prices in USD per workspace, per month. Cancel anytime.

Give your agent a pen.