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ONE STUDY. SHARED WITH YOUR AGENT.

Give the conversation
a working page.

Connect an MCP client to Napkin. Your agent can build, edit, and check a study; supported MCP Apps hosts can display the interactive drawing.

Install the local plugin

The local Napkin plugin also works through stdio. Local plugin studies stay on your machine; this web account uses a separate store.

Open the Napkin repository on GitHub ↗

npm ci
npm run plugin:check
codex plugin marketplace add .
codex plugin add napkin@napkin-local

Run these commands from the Napkin repository and restart Codex after installation.

Connect with OAuth

Add this URL as a remote Streamable HTTP MCP server in your client. Follow its sign-in prompt to authorize access to your studies.

https://napkin.engineering/mcp

Use the client’s OAuth flow. Your Napkin browser cookie is not an MCP access token.

Create your Napkin account ↗

Let your agent sign up

Give your agent this prompt:

Follow https://napkin.engineering/auth.md to register with Napkin on my behalf. Ask me to complete the claim step, then connect to https://napkin.engineering/mcp.

WorkOS handles agent registration and the user claim. The agent needs your confirmation before it can access your personal studies.

Read the live signup guide ↗

What you can do with Napkin

Author .napkin source, inspect equations and units, compare scenarios, and explore linked drawings. The full Study view includes source diagnostics and draft previews; conversational cards show the current question and its deciding checks.

Read the language reference ↗ · Try the live calculator ↗