Developer program

Apply for a developer account

Every developer on the network is approved by us first. Approved developers build on LotPoster Demo Motors, our sandbox dealership, and submit their app for review before it lists on the network.

Apply. Tell us who you are and what you want to build, and accept the developer terms.
We review it. We read every application ourselves. Nothing is open to you until we approve it.
Sign in to Demo Motors. You get a one-time link by email to set up your sign-in. Its cars, customers and deals are made up, and nothing sent from it leaves the building.
Build with an API key. Approved developers make read-only API keys for the sandbox on their developer page. Keys are limited per hour and per day, expire after 90 days, and every call is logged. A key is shown once and can be revoked at any time.
Submit your app. Submit it from your developer page. We review every app before it lists on the network.

Your name Company or your own name if you build on your own Email Website optional What do you want to build? who it's for and what it does at the dealership

Developer terms version 2026-11-13.1, draft for legal review

Who this is between

These terms are between Coups Corner LLC, which runs Lot Poster and the Dealer SI Network ("we", "us"), and the person or company named on the application ("you"). The person who accepts them confirms they may accept for that company.

1. What you get

If we approve you, you get a sign-in at LotPoster Demo Motors, our sandbox dealership, and API keys for that sandbox. Its cars, customers, deals and messages are made up. Nothing you do there reaches a real customer: texts, emails and posts from the sandbox are held.

You do not get access to any real dealership's data. That comes, if ever, only after an app is reviewed and a dealership installs it.

2. Approval and review

We approve or decline applications, and we may revoke access at any time, for any reason. Revoking ends your sign-in and stops every key you made.

An app you submit is listed on the network only after we review and approve it. We may decline or remove a listing.

3. Keys, limits and logs

Keep your keys secret. Each key is shown once; we keep only a fingerprint of it.

Every API call is logged: which key, which store, which address, when, and the answer's status. We do not log what came back. Calls are limited per hour and per day; above the limit the API answers 429.

Don't try to reach a store your key isn't for, get around a limit, or scrape, resell or republish the data. We watch for it, and it ends your access.

4. Your app and your data

You own your app. You are responsible for it and for following the law when it runs.

We keep your application and your activity logs for as long as your account is open, and the call logs for the period our retention rule sets.

5. No warranty

The sandbox and API are new and change. They are provided as they are, without warranty. Our total liability to you is limited to what you paid us, which during the sandbox is nothing.

6. Changes

We may change these terms. A new version applies once you accept it; until then your access may pause.

I have read the developer terms and accept them for myself and my company.

Application received

Thanks. We'll review it.

We sent a confirmation to your email. If we approve your application, you'll get a one-time link to set up your sign-in at Demo Motors.