Claude Plugin

Bring Addison into Claude Code and Claude Desktop — ask data questions, generate and validate reports, explore your catalog without leaving Claude.

The Addison plugin puts Summation’s AI data analyst directly inside Claude. Setup takes about two minutes and one browser sign-in — no API keys, and no secrets ever pasted into chat. Everything Addison does runs as you, against your Summation workspace.

Claude Code

Anyone can install the plugin themselves from a Claude Code session — no admin required.

1. Add the Summation marketplace

   /plugin marketplace add summationai/addison-plugin
   
2. Install the plugin, then restart Claude Code

   /plugin install addison@summation
   

   Restart Claude Code so the plugin loads.

3. Sign in

   /addison:signin
   

   Addison shows a sign-in link and a short verification code:

   Open this link and approve to connect Claude to Summation — it expires in 10 minutes.
   https://app.summation.com/device?code=WXYZ-1234
   Verification code: WXYZ-1234
   

   Open the link, approve in your browser, and you’re connected. The Summation data tools wire up automatically.

4. Take the tour

   /addison:start
   

   A guided first run: a map of your connected data, an introduction to Addison, and your first report.

Commands

Command	What it does
/addison:start	Guided onboarding — data map and first report
/addison:report	Generate a report and export it (PDF, DOCX, or Markdown)
/addison:query	Run a read-only query and see results as a table
/addison:catalog	Search your tables, views, and schemas
/addison:validate	Fact-check a report against its sources before sharing
/addison:signout	Disconnect and remove the stored credential

You don’t need commands for most work — just ask data questions in plain English and Addison picks them up.

Claude Desktop

On Claude Desktop (including Cowork), plugins are managed per organization: a Claude admin enables Addison once, then every member installs it from the org library.

For your Claude organization admin

1. Add Addison from GitHub

   Go to claude.ai → Orgranization settings → Plugins → Add plugins, select Sync from Github (you have to fork this repo or upload the zip file available on the plugin releases page.

   

   If you want to upload the plugin as a zip file:

   

   Once, it is installed, make sure to select the appropriate User access:

   
2. Allow network access to Summation

   Addison’s helper runs in Claude Desktop’s code-execution sandbox, which blocks outbound network access by default. Under Admin settings → Capabilities → Code execution → Network access, allow both hosts:

   api.summation.com
   mcp.summation.com
   

   
3. Publish to your organization

   Publish Addison to the org library so members can install it.

For team members

1. Install from your org library

   In Claude Desktop, open Settings → Plugins → Brown, find Addison in your organization’s library, and install it by clicking on the (+) icon.

   
2. Start and sign in

   Open a new chat and type /addison:signin. Approve the sign-in link in your browser and Addison shows a map of your data.

Troubleshooting

/addison:signin fails immediately on Desktop

Almost always the network allowlist. Ask your Claude admin to confirm api.summation.com is allowed under Code execution → Network access.

"Not signed in to Summation. Run /addison:signin to connect."

Your session expired or was never completed. Run /addison:signin again — it takes seconds.

A report or query is taking a while

Report generation and validation are thorough and can take a minute or two. Addison tells you it’s working — this is normal, not a hang.

Desktop asks me to sign in again in a new conversation

On Claude Desktop, credentials live in the per-conversation sandbox and don’t always carry over. Re-running /addison:signin reconnects in seconds. A one-click connector sign-in is coming — see MCP Server.

I need automation or a non-production environment

The plugin is production, browser-sign-in only — the right default for almost everyone. For machine-to-machine access, see Public API or contact your Summation representative.