I am trying to incorporate bitcoin in one of the applications and want to integrate the REST API which exposes all the public information.
I tried using
https://chain.api.btc.com/v3/block/3 but upon multiple requests, it starts to error out with message "Do not abuse the api".
Kindly provide the reference to API which I can use
https://testnet.blockexplorer.com/api as well but doesnt work. Even the link on
https://github.com/blockchain/api-v1-client-python#request-limits-and-api-keys leads to error page on web