MCP server

Connect Claude or ChatGPT to TogetherDone

TogetherDone runs a hosted Model Context Protocol (MCP) server. Connect it to Claude or ChatGPT and ask it to read your lists, add items, check things off, and tell you what's due. It works as you, with only the access you approve. Claude Code and other MCP clients connect the same way, with just the server URL.

Before you start

TogetherDone Pro. Connecting apps is a Pro feature. Upgrade to Pro first if you haven't.
A Claude account. Every Claude plan can add custom connectors; the Free plan allows one.
Or a ChatGPT account on a plan with developer mode (Plus, Pro, Business, Enterprise, or Education), used on the web. A workspace admin can turn developer mode off.

Connection details

MCP server URL

https://mcp.togetherdone.app/mcp

That's all you enter. There's no client ID or secret to copy.

Set up the connector in Claude

In Claude, open Customize then Connectors (claude.ai/customize/connectors) and choose Add custom connector. On a Team or Enterprise plan, an Owner adds it under Organization settings then Connectors instead.
For MCP server URL, enter the server URL above.
For Authentication, choose Sign in now.
For OAuth client, choose Use Claude's published identity. If your dialog instead shows a name, a URL, and Advanced settings on one screen, name the connector TogetherDone and leave Advanced settings empty.
Select Add, then Connect. Claude opens TogetherDone: sign in, check that the approval screen says Published by claude.ai, review the access Claude is asking for, and choose Approve.
In a chat, click the + button, select Connectors, and turn on TogetherDone.

With its published identity, Claude proves the request comes from claude.ai, and TogetherDone checks that before showing the approval screen. Register automatically also connects, but the approval screen will mark the app as unverified. Claude's own custom connector guide covers the dialog in more detail.

Use it wherever you use Claude

Connect once on claude.ai and TogetherDone is available in Claude on the web and in Claude's desktop and mobile apps when you're signed in to the same account.

In Claude Code, sign in with your Claude account and the connector appears there too (run /mcp to see it). Or add TogetherDone to Claude Code on its own, then run /mcp and choose TogetherDone to sign in:

Claude Code command

claude mcp add --transport http togetherdone https://mcp.togetherdone.app/mcp

Set up TogetherDone in ChatGPT

In ChatGPT on the web, open Settings then Security and login and turn on Developer mode.
Go to chatgpt.com/plugins and select the + button.
Name it TogetherDone. Under Connection, enter the server URL above.
For authentication, choose OAuth and leave any client ID and secret empty. If ChatGPT asks how to register, choose its client metadata document (CIMD).
Create the app. ChatGPT opens TogetherDone: sign in, check that the approval screen says Published by chatgpt.com, and choose Approve.
In a chat, open the + menu, choose Developer mode, and select TogetherDone.

ChatGPT asks you to confirm each change before it makes it, like adding an item or archiving a list. Looking things up doesn't need confirming. OpenAI's developer mode guide covers the settings in more detail.

Things to ask

Add eggs, milk, and coffee to my Groceries list.
What's due this week?
Make a Packing list for the beach trip with a Toiletries section.
Mark “Call the dentist” as done.

What it can do

The connection gives Claude or ChatGPT these tools. Each one needs the access shown beside it.

Lists

list_lists
See all of your lists.
Read
get_list
Open one list with its details.
Read
create_list
Create a list with a title, color, icon, and category.
Write
update_list
Rename, recolor, pin, or recategorize a list.
Write
archive_list
Archive a list.
Delete

Items

list_items
See the items in a list.
Read
list_items_due
See what's due across all of your lists.
Read
create_item
Add an item to a list.
Write
update_item
Edit an item's text, notes, due date, priority, or quantity.
Write
complete_item
Check an item off.
Write
archive_item
Archive an item.
Write

Sections

list_sections
See the sections in a list.
Read
create_section
Add a section to a list.
Write

Search and profile

search
Search your lists and items.
Read
get_profile
Read your TogetherDone profile.
Read

Collaborators, share links, and reminders stay in the TogetherDone app and the REST API.

Permissions and access

Claude and ChatGPT work as you. They can reach the same lists you can open in TogetherDone, and nothing else.
When you connect, TogetherDone asks you to approve read, write, and delete access. Delete access is what lets the app archive a list.
The approval screen shows who is asking and where approving will send you. Claude appears as Published by claude.ai and ChatGPT as Published by chatgpt.com; an app TogetherDone hasn't verified carries a warning.
Connected apps in your TogetherDone settings lists every app you've approved. Revoking one cuts off its access immediately. You can also remove the connector in Claude under Customize then Connectors, or the app in ChatGPT at chatgpt.com/plugins.
You'll be asked to connect again every 90 days, or sooner if the connection goes unused for about 30 days.

Troubleshooting

Claude can't connect: Claude doesn't let you change sign-in settings after adding a connector, so remove it and add it again with Use Claude's published identity. If it still can't connect, add it once more with Use your own OAuth client, the client ID claude-web, and no client secret.
ChatGPT has no + button for new apps: Turn on Developer mode under Settings then Security and login first. If it isn't there, your plan or workspace doesn't allow it.
The TogetherDone approval screen has no Approve button: Your account doesn't have Pro. Upgrade to Pro, then connect again from Claude or ChatGPT.
The TogetherDone tools stopped working: Access ends when Pro lapses, when you revoke the app in Connected apps, after about 30 days without use, and every 90 days. TogetherDone also ends a connection when an old sign-in token is used a second time, which can mean someone copied it. Renew Pro if needed, then reconnect from Customize then Connectors in Claude or from the app's page in ChatGPT.

Other AI agents

Any MCP client that supports OAuth sign-in can connect. Add the server URL above as a remote (HTTP) MCP server and sign in when it asks. The app registers itself with TogetherDone, so the approval screen marks it as unverified and shows where approving will send you: approve only a connection you just started.

Desktop apps that finish signing in on this computer (such as editors that open a browser window) are supported. Apps that finish signing in through their own link scheme aren't yet. If an app can't connect, email support@togetherdone.app.

Building your own integration? The REST API works with a personal API key. Create one under API keys in your TogetherDone settings, then see the API documentation.

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