ChatGPT App Development

A ChatGPT app connects ChatGPT to your own listings, products or catalog, so people can search your offer in a conversation. I build it on your data, from the first prototype to OpenAI review.

Your listings, searchable inside ChatGPT

People describe what they are looking for in plain language, refine it in a conversation and expect to see matching results right away. A ChatGPT app makes that possible with your own offer. Large platforms such as Zillow and Pararius already have one.

You don't need to be a portal to offer this. A ChatGPT app connects ChatGPT to your own data: your listings, products, vacancies or courses. ChatGPT turns a question into a search, your app returns the results, and visitors click through to your pages.

Live demo

Try it: search the listings of a (fictional) brokerage

Ask for a condo in Austin, a house with a yard in Denver or commercial space in Chicago, and watch how the question becomes a search. Click a listing for details.

Demo RealtyHomes in six US cities App in ChatGPT · demo

Fictional listings. Answers come from an AI model (Claude) that uses the same search tool as the real ChatGPT app below. Inside ChatGPT, ChatGPT does this part.

Or try the real app in ChatGPT

The same demo runs as a working ChatGPT app. Add it as a custom app with this server URL:

https://etiennegozems.com/mcp/demo-realty
  1. In ChatGPT, go to Plugins (chatgpt.com/plugins) and choose + › Add custom MCP server.
  2. Enter a name, paste the URL above and choose no authentication.
  3. Install it, start a chat and call it with @Demo Realty. Ask for example for a condo in Austin under $450k.

Whether you can add custom apps depends on your ChatGPT plan and workspace settings.

Who this is for

  • Real estate brokerages, franchise networks and developers with a sizeable inventory (see ChatGPT app for real estate)
  • Property and rental platforms that want their own presence inside ChatGPT
  • Businesses with a catalog people search by criteria: products, vacancies, courses, holiday homes, used cars
  • Teams that already have their data in an API, feed or database

What I build

Data connection

A read-only connection to your listings or catalog: an API, a feed, your CMS or a regular export. For real estate, I first check what your MLS, IDX or portal agreements allow.

Search tools

The tools ChatGPT calls: search by location, price, type and features, and details per item. Clear descriptions, so ChatGPT knows when and how to use them.

Results view in ChatGPT

Cards with images, prices and key details, shown inside the conversation, linking to the pages on your website.

Hosting and security

A small, read-only server with rate limits. It only exposes the data you choose to share.

Testing and submission

Testing in ChatGPT with real questions, then help with OpenAI's submission and review so the app can be listed.

How it works

1

Intro call and data check

We look at your data, what people search for, and whether an app makes sense for you.

2

Prototype on your data

A working version on your own listings or catalog, which you can test in ChatGPT yourself.

3

Refine

We test it with real questions and improve the search, the descriptions and the results view.

4

Submit and launch

I help you through OpenAI's review and get the app ready for users.

5

Measure

We track how people use it and how many of them click through to your website.

Good to know

An app is not the same as being recommended. People need to find and open your app, publishing requires a review by OpenAI, and ChatGPT won't automatically suggest it for every general question. That's why it works best alongside SEO and AI visibility, not instead of it.

For the full picture, read my article on how to make your real estate business visible in ChatGPT.

What's Included

Check of your data source and listing rights

Search tools built on your listings or catalog

Results view inside ChatGPT, linking to your pages

Read-only, rate-limited hosting

Testing in ChatGPT before launch

Support with OpenAI submission and review

Have a listings or product database?

Let's look at your data and whether a ChatGPT app makes sense for your business. You get a fixed proposal after a short data check.

Book a free intro call Try the live demo

Interested in ChatGPT App Development?

Get in touch to discuss your project requirements and how this service can help you achieve your goals.

Or email me directly: etienne@etiennegozems.com

Book a free SEO call