Marketplace app development
Custom HighLevel Marketplace apps you can launch, maintain and resell.
The work
What this actually involves
A Marketplace app is not a snapshot with a logo on it. It is a real piece of software: an OAuth handshake, a token store, install and uninstall lifecycle, webhook subscriptions, a database, and an interface someone actually uses during their working day.
I have 63 live apps in my developer account with 2,268 installs across 887 active sub-accounts. That is the plumbing already built and proven, which is why the second app costs a fraction of the first.
Included
What you get
Per-location OAuth
Scoped tokens per sub-account, refreshed automatically, so a write can only ever reach the location it belongs to.
Install and uninstall
Both directions handled properly, including what happens to data when an account removes the app.
Webhooks and sync
Subscribed, verified, de-duplicated, and replayed when the far end goes quiet.
Your own interface
The screens the job actually needs, not a settings page bolted onto HighLevel's.
Hire me when
Signals this is the right piece of work
An existing app is stuck in review, or fails on install for some accounts and not others
You want the same platform layer reused across a second, third and fourth app
You need the app white-labelled so an agency can resell it under its own brand
Tokens expire, webhooks fire twice, or the app silently stops syncing
Talk it through before anything is quoted
Start here
Start with the audit
A written architecture record and a staged plan, useful whether or not I build the rest.