How to Connect Your Car Rental Software to ChatGPT and Claude

Quick answer: To connect car rental software to ChatGPT or Claude, the software needs an MCP connector. Nomora has one at https://app.nomora.io/api/mcp. In Claude, add it under Settings → Connectors → Add custom connector. In ChatGPT, add it under Plugins → Add custom MCP server. Sign in with your Nomora account, pick your company, and the assistant can look up bookings, free cars and balances, and create bookings or record payments. By default it asks for your approval before each change.

Most rental operators already have ChatGPT or Claude open in a browser tab. Until recently it was little help with the actual business, because it could not see the fleet. You pasted in a spreadsheet, it guessed, and you checked the answer by hand anyway.

That changed with connectors. A connector lets the assistant use your rental software directly: read today's bookings, check which cars are free, quote your real prices and, if you allow it, create the booking. This guide shows how to set it up with Nomora, what to ask first, and what to check before you let any AI change rental data.

What is an MCP connector?

MCP (Model Context Protocol) is an open standard that lets AI assistants use tools inside other software. The software runs an MCP server. The assistant connects to it, you sign in once, and from then on the assistant can call the tools the server offers.

For a rental company, that means questions like "who still owes us money?" get answered from your booking records, not from the assistant's guess. And requests like "book the RAV4 for Jonas" go through the same checks as a booking made in the app.

Nomora's connector went live on 20 October 2026. It works with ChatGPT, Claude and Grok and has 88 tools: 46 that look things up and 42 that make changes.

What you can do once it is connected

Ask about the business

These run on your live data and change nothing:

• "How much did we earn in October?"
• "Which cars are free this weekend?"
• "Who still owes us money?"
• "Which cars are due for a service?"
• "What was our fleet utilization last month?"
• "Who were our best customers this year?"

Hand it the work

These change data, so the assistant shows you the action and waits for approval:

• "Book the RAV4 for Jonas, 3 to 7 December"
• "Record Laura's €200 bank transfer"
• "Text Mark his customer link"
• "Block out the Kia on Friday for new tyres"
• "Make the rental contract for Laura's booking"
• "Set the SUV class to €65 a day"

Clear the paperwork

The assistant can read files you drop into the chat, so admin you used to type by hand goes faster:

• "Add the expenses in this file that are missing" (it skips the ones already recorded)
• "Log this garage invoice as maintenance on the Octavia"
• "Add this lease as a monthly expense"

Answer booking emails

If Gmail or Outlook is connected to the same assistant, it can work through booking inquiries. It reads the dates and car the customer asked for, checks what is free in Nomora, quotes from your price list, and replies with your booking link or creates the booking and sends its customer link. Claude and ChatGPT can run this on a schedule, for example every hour.

How to connect Nomora to Claude

1. In Claude, open your profile menu and go to Settings → Connectors. On a Team or Enterprise plan, an owner first adds the connector under Organization settings → Connectors.
2. Click Add → Add custom connector, name it Nomora, paste https://app.nomora.io/api/mcp and click Continue.
3. Keep the settings Claude detects and click Add.
4. Click Connect. On Nomora's sign-in screen, choose your organization and click Allow.

How to connect Nomora to ChatGPT

1. In ChatGPT, click Plugins in the sidebar, then Add → Add custom MCP server.
2. Name it Nomora. Under Connection, keep Server URL and paste https://app.nomora.io/api/mcp. Keep OAuth as the authentication.
3. Tick I understand and want to continue and click Create as a plugin.
4. Click Connect Nomora, choose your organization and click Allow.

Whether ChatGPT lets you add a custom server, and use the actions that change data, depends on your ChatGPT plan.

How to connect Nomora to Grok

Open grok.com/connectors, click New connector → Custom, paste the connector URL, sign in to Nomora and choose your organization.

Only organization admins can connect. If you belong to more than one company in Nomora, the assistant only sees the one you pick at sign-in.

15 prompts to try in your first week

What to check before you connect any rental software to AI

Not every AI integration is built the same. Before you connect a system that holds customer data and bookings, check these six things. Nomora's answers are in brackets.

1. Does it ask before changing anything? The assistant should show each write action for approval. (Yes. Claude and ChatGPT ask, unless you choose "always allow" for an action.)
2. Does it follow the same rules as the app? An AI should never be able to create a double booking. (Yes. Nomora refuses a booking for a car that is already booked.)
3. Can you see what it did? Changes should be logged with who made them. (Yes. The booking history shows, for example, "Tomas (via Claude)".)
4. Who can connect? Not every employee should be able to hand company data to an AI. (Only organization admins.)
5. Does it move money? (No. Recording a payment or refund writes it in Nomora. It does not charge a card or send money back.)
6. Where does the data go? The assistant's provider receives what the assistant reads. (OpenAI for ChatGPT, Anthropic for Claude, xAI for Grok, under your account with them. Disconnect to stop access.)

What stays in the app

Some steps are better done with the car and the customer in front of you. Vehicle pickup and return, invoices, uploading files and sending documents for signature stay in the Nomora app. Damage inspections also run in the app, on your phone.

Is it worth it for a small fleet?

For a 10-car company, the main win is time on email and admin. A booking inquiry used to mean checking the calendar, working out the price and writing the reply. Now it is one approval. Month-end questions like "what did we earn and who still owes us" become one sentence instead of an export.

The connector is included in every Nomora plan, from €45 a month, so the only extra cost is your own ChatGPT, Claude or Grok subscription.

Frequently asked questions

Which car rental software works with ChatGPT and Claude?

Nomora does. It has its own connector for ChatGPT, Claude and Grok at https://app.nomora.io/api/mcp, with 88 tools for bookings, customers, payments, fleet, pricing, documents, maintenance, expenses and SMS. It is included in every plan.

Do I need a paid ChatGPT or Claude plan?

You need an account that allows custom connectors. In ChatGPT, whether you can add a custom MCP server and use write actions depends on your plan. In Claude, connectors are under Settings → Connectors, and on Team or Enterprise plans an owner adds the connector first.

Can the AI make mistakes with my bookings?

It can misread a request, which is why every change waits for your approval by default. It cannot break the rules Nomora enforces: a booking for a car that is already booked is refused, and every change is logged in the booking history.

Is my customer data safe?

Only organization admins can connect, and the assistant only sees the company chosen at sign-in. The assistant's provider receives what it reads from Nomora under your account with them. Nomora does not share payment or API credentials with the assistant.

Can it work in Lithuanian or other languages?

Yes. ChatGPT and Claude answer in the language you write in, and the data comes from Nomora as it is stored.

See everything the Nomora connector can do →