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Use DaySync in Claude and ChatGPT

Last updated November 14, 2026

What it does

Connect DaySync to Claude or ChatGPT and ask about your business in plain words. The assistant reads your DaySync data and answers in the chat. When you ask it to change something, it asks you first, unless you've set that tool to run without asking (see Tool permissions).

You can ask it to:

  • See your day and your free times.
  • Find a client and their visit history.
  • See who is due back.
  • Read the business report (for roles that can see reports).
  • Book, move or cancel a visit.
  • Mark a no-show.
  • Add a client or a note on a client.

Some things you could say:

  • "What does my day look like tomorrow?"
  • "When am I free on Friday afternoon for a 90-minute color?"
  • "Who is booked with me next week?"
  • "Find Maria Ivanova and show her last three visits."
  • "What did I note on Dana's last visit?"
  • "Which clients haven't been back in two months?"
  • "How did the business do this month?"
  • "Book Maria for a haircut on Thursday at 2 pm."
  • "Move Dana's Friday visit to Saturday morning."
  • "Add a new client, Olga, with this phone number, and note that she prefers evenings."

In the chat, DaySync can also show a My Day timeline and a picker of free times, so you can see the answer and tap instead of typing.

Anyone on the team can connect with their own DaySync sign-in. Each person sees and does only what their role allows in DaySync. The connection is available on every plan.

How to connect

DaySync's connector address is:

https://mcp.daysync.io/connect

Until DaySync is listed in the Claude and ChatGPT directories, add it with this address. In every app you then sign in to DaySync and tap Allow. After that, go back to the chat and ask your first question.

Claude

  1. In Claude, open Customize, then Connectors, and choose Add custom connector.
  2. Paste the address. Leave "Sign in now" on and keep Claude's published identity.
  3. Claude opens the DaySync permission page. Sign in to DaySync, pick the business and tap Allow.

ChatGPT

Adding a connector by its address needs Developer mode, which is available on paid ChatGPT plans. Once DaySync is listed in the ChatGPT app directory, you can connect from there instead.

  1. In ChatGPT, go to Settings, then Apps and connectors, then Advanced settings, and turn on Developer mode.
  2. Create a connector, paste the address and choose OAuth sign-in.
  3. Sign in to DaySync on the permission page, pick the business and tap Allow.

Claude Code

Run this command, then type /mcp in Claude Code and choose DaySync to sign in:

claude mcp add --transport http daysync https://mcp.daysync.io/connect

Other apps

Paste the same address where the app adds an MCP server or connector, then sign in to DaySync and tap Allow.

What it can't do

The connection works with your schedule, clients and reports. It cannot:

  • take or change payments, deposits or refunds
  • change your plan
  • change settings
  • manage the team or payroll
  • manage products and stock
  • send messages to clients, other than the automatic booking messages described below

Tool permissions

You decide in your own AI app which DaySync tools can run without asking. Your AI app keeps this setting for your account. DaySync doesn't set it for you.

  • Tools that read: your day, free times, clients, reports, services and team. Two of them also show a card in the chat: My Day and the free-times picker. They don't change anything in DaySync, so they're safe to set to "Always allow" (the name can differ in your app).
  • Tools that change something: book, move or cancel a visit, mark a no-show, add a client or add a note. Booking, moving and cancelling send your client a message, so leave these on approval. The assistant then shows what it's about to change, and nothing happens until you approve it.

When you book, move or cancel a visit, your client gets the usual email or WhatsApp message, according to your business's message settings in DaySync. A WhatsApp message uses one of your message credits. Check the details before you approve.

How to disconnect

Open the DaySync web app, go to Settings, then Connected apps, and choose Disconnect next to the assistant. The assistant can no longer reach your DaySync data. Resetting your DaySync password also disconnects every connected assistant.

Data and privacy

  • DaySync does not store your conversations with Claude or ChatGPT.
  • DaySync records that a tool was used, by which business, from which assistant, and whether it worked. It does not record your questions, the answers or the details in a request.
  • Anthropic (Claude) or OpenAI (ChatGPT) receive the answers to the questions you ask, and handle them under their own terms.
  • Access keys last 1 hour and renew while you use the connection. A connection lasts until you disconnect it, or until it has gone unused for 60 days.

The full details are in the Privacy Policy.

Contact

Stuck or have a question? Email support@daysync.io or use the contact form. We usually answer within a few hours and always within a day.