question Free domain / keyword research API.

Doesn't google provide this? (in AdSense?) Or you can only use it manually, and not "too much"?

PM

If your looking domain valuation tool then try Estibot, but it's not free,
Estibot shows detailed information about domain

Thanks for the comments all. I already have access to these tools - and am a subscriber. However, I see big holes in the way they value. So, am wanting to try and create something new. Always good to have a number of different valuation disciplines at your disposal.

My question was regarding APIs for any developers out there.

Unfortunately, the quality of the service you want to provide will be determined by the quality of the data you are going to use, which in turn means $$$.

I can tell you that, if you plan to use free or cheap services to get the data you need, better use nothing at all. No data is better than wrong data imo.

There are some data providers that included everything including the garden shed. Hence being expensive. I don't mind paying for Data, but the actual data I need for the metrics I intend to use should be pretty standard / readily available. If anyone has some APIs that they can direct me to that would be great. I have some already, but more option is always better.

Any data that you can't harvest yourself but someone else can needs money. If it was readily available then you wouldn't look for it here in the forum.
Apologies if I sound blunt but that's how it is.

I don't provide any services and only to support my own research I pay high $$$/mo in tools just to get the basic stuff done.

If there is something specific you need I might point you to the right direction. PM me if you are hesitant to post it in public.