> Is there a law mandating realtime reporting, or something

Not real time in WA, but all records are public and reported fairly consistently. See https://www.topshelfdata.com for an example of that.

> or are there just limited number of POS providers and they all have realtime API(s)?

This is Headset who is probably the largest retail POS provider (amongst other offerings on the producer/processor side and more) for legal marijuana sales. I'm assuming the data presented here is exclusively from their POS platform. I don't know of any public sources for real time sales data.

> I bet the dashboard doesn't have Johnny from my street corner's transaction...

Yes I'd also bet Johnny doesn't report his sales to a central database/platform.

Headset isn't a POS, we integrate with essentially all of the POS providers. At the bottom of the page there is a list with sales represented.

My mistake! I remember that now. Thanks for clarifying.

Not sure what more substance you need, we integrate with close to 30 different POS providers, that's it. There is no law mandating realtime reporting. Every transaction from thousands of retailers is represented... What more do you want to know?

This is a better answer. "Point of sale APIs" is as clear as "we get the data in JSON format", i.e. not answering the question at all.

Why would they give you access to that information?

We provide tools to manage their inventory, better sales reporting than what most POSs provide, marketing tools, etc.

Can I buy everything from Johnny on the corner? He seems like a nice guy and not a snitch