Custom MCP connectors are a developer-mode feature and availability depends on your ChatGPT plan. If you cannot see the setting below, your plan does not currently expose it — Claude supports custom connectors on its paid tiers.
1
Enable developer mode
In ChatGPT, open Settings → Connectors and turn on Developer mode (under Advanced).
2
Add the server
Choose Create / Add custom connector and paste
https://mcp.daysync.com/mcp. Name it Daysync.Leave the authentication settings on OAuth — the server publishes its own metadata, so the client discovers the endpoints itself. There is no client ID or secret for you to enter.3
Sign in and consent
ChatGPT opens the Daysync sign-in page, then the consent screen listing the scopes being requested. Approve to finish.You will be asked to sign in on every connect, by design — see Authentication.
4
Confirm the account
In a new chat, ask “which Daysync account am I connected as?”. The
whoami tool answers with the email on the connection.Enabling it in a conversation
Developer-mode connectors are not always on by default. In a new chat, open the tools menu and make sure Daysync is enabled before asking anything that needs it. Then try:List my Daysync organizations.
Notes and limits
- Tool lists are cached per conversation. After Daysync ships new tools, start a new chat to see them.
- Write operations need confirmation. ChatGPT will ask before running anything that changes data. Tools are annotated so destructive ones (deleting a tour, deleting a tag) are flagged as such.
- Large reads can be truncated by the client. Prefer narrower questions — a single day rather than a whole tour — or ask it to use
get_tour_datawithdayIds.
Disconnecting
Remove the connector in ChatGPT’s settings, and/or revoke from Daysync under Settings → Integrations in the web app. You can also just ask ChatGPT to disconnect, which revokes that one connection.Next: Authentication · Tool catalogue · Troubleshooting