Have you looked at Alpaca's Market Data API or Polygon.io. Both premium options are reasonably priced and give you access to both historical and real time trades. Source: over 1 year ago

I think https://alpaca.markets/data still offers free api keys for research purposes. Source: almost 2 years ago

Https://alpaca.markets/data - As you see you get 100% market coverage for all US exchanges and unlimited API / WebSocket access. They also have 1min bar historical data (I do not know about the tick level). I can not speak to the quality of the API Access as I have a TotalView subscription. Source: almost 2 years ago

Free tier for researchers, now $99/month for the algotrading access (link: https://alpaca.markets/data). Source: about 2 years ago

Https://alpaca.markets/data free plan has 200 calls/minute limit which is what you want anyway. Source: over 2 years ago

I read somewhere that Google Ad Manager can solve my Problems. Is that true? Can someone send me a link of their documentation where they show this feature? Because I don't understand really Google Ad Manager, I saw their website https://admanager.google.com/home/ but it feels like AdSense, just for businesses who have more ad space with different interest groups and so on with better ad network Management or... Source: over 2 years ago

Thanks for that info! Yes, I filled out a form at https://admanager.google.com/home/ and that's when this Google person reached out to us. Source: about 3 years ago

You sure you just signed up at https://admanager.google.com/home/ ? Just register an Adsense account, then a free GAM account and you should be good to go. Source: about 3 years ago