Both of these sites provide API functionality, but they are limited to a single cryptocurrency. If I wanted to integrate many cryptocurrencies into my site I would need to integrate a different API for each of the cryptocurrencies I support.
I'm looking for a site/solution that offers a single interface to obtain gas/transaction/miner fees for all major coins such as BTC, ETH, LTC, BCH, USDT, USDC, XRP etc. The API must also provide estimates based on the desired transaction confirmation times. In other words, I should be able to request estimated fee if I want 90% likelihood of confirmation within the next 30 min, 60 min, 600 min and so on.
Update: Can someone please explain in the comments why this is off topic? 1) this question IS applicable to Bitcoin (questions in which the answer is the same for Bitcoin are on topic) 2) I am not seeking a product or service review I am asking if such a service exists (it's a factual question) How does this question differ from:
Which asks for a specific service/API..