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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.

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Claude Code

Anyone can install the plugin themselves from a Claude Code session — no admin required.
1

Add the Summation marketplace

2

Install the plugin, then restart Claude Code

Restart Claude Code so the plugin loads.
3

Sign in

Addison shows a sign-in link and a short verification code:
Open the link, approve in your browser, and you’re connected. The Summation data tools wire up automatically.
4

Take the tour

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

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Commands

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

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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.

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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.
The Claude.ai organization Plugins settings, Add plugins dialog with the Sync from GitHub option selected and a field for the forked addison-plugin repository
If you want to upload the plugin as a zip file:
The Add plugins dialog with the upload option selected, accepting a zip file downloaded from the addison-plugin releases page
Once, it is installed, make sure to select the appropriate User access:
The installed Addison plugin settings showing the User access control that governs which organization members can install and use it
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:
Claude Desktop Admin settings, Code execution Network access panel with api.summation.com and mcp.summation.com added to the allowed hosts.
3

Publish to your organization

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

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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.
Claude Desktop Settings, Plugins view showing Addison in the organization library with the plus icon used to install it
2

Start and sign in

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

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Troubleshooting

Almost always the network allowlist. Ask your Claude admin to confirm api.summation.com is allowed under Code execution → Network access.
Your session expired or was never completed. Run /addison:login again — it takes seconds.
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.
On Claude Desktop, credentials live in the per-conversation sandbox and don’t always carry over. Re-running /addison:login reconnects in seconds. A one-click connector sign-in is coming — see MCP Server.
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.