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Fast Party works on the web, on your phone, and inside the AI assistant you already use. It’s one account everywhere, so an event you create on your phone is instantly on the web and in Claude.

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Get the app

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Web

Go to app.fastparty.ai in any modern browser. There’s nothing to install, and every feature is available. The Event Dashboard, where you run your events, is on the web only for now, and works best on a desktop or laptop.

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Mobile

Download on the App Store

Fast Party for iPhone.

Get it on Google Play

Fast Party for Android.

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Guests don’t need the app

Guests and attendees receive a link by WhatsApp or email. They can RSVP, register, pay and check in from that link in any browser. To open the full Event Page, they sign up for a free Fast Party account.

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Connect your AI

Fast Party runs an MCP server with 250+ tools. Add it once as a custom connector in Claude or ChatGPT, and your AI can create and update events, invite guests, build schedules and answer questions about your own data. It isn’t listed in a connector store, so use the steps below. You’ll need a Fast Party account first. The connector signs you in with that same account, so nothing is copied anywhere else.
Requires Claude Pro or higher. Each person connects their own Fast Party account.The easy way: connect from inside Fast Party
1

Log in to Fast Party

Sign in at app.fastparty.ai.
2

Click Connect with Claude

Click the Connect with Claude button in the top-right corner of any page. Fast Party is added to your Claude account and connected. There’s no URL to copy.
Or add it by hand in Claude:
1

Open Connectors

In claude.ai or the Claude desktop app, click Customize, then Connectors.
2

Add a custom connector

Click +, then Add custom connector. Enter:
  • Name: Fast Party
  • URL: https://mcp.fastparty.ai/mcp
Click Add.
3

Connect and sign in

Click Connect on the Fast Party listing, then sign in with your Fast Party account.
Full Claude guide with screenshots →

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Check it worked

Ask your AI: “What Fast Party tools do you have access to?” It should list them. Then just ask, for example:
“Create a birthday dinner for my daughter on 5 July at 7 pm, 20 guests at our house.”

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Your data, your permissions

  • Nobody gets more access through AI than they already have in Fast Party. If you can’t see something in the app, your AI can’t either.
  • You stay in control. Review and approve actions when asked, and disconnect at any time from your AI’s connector settings. Your Fast Party data stays intact.
  • Fast Party never trains AI models on your event data, and never sells or shares it for marketing.
Stuck? Email contact@fastparty.ai and we’ll set it up with you.

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Everything stays in sync

RSVPs, registrations, potluck sign-ups and task changes appear everywhere in real time, whether they were made in the app, on the web or through your AI.