there is a testnet for blockchain.info here but I can't find a url for calling api(s) in testnet as such we have in main network
on main network https://api.blockchain.info/v2/receive?xpub=$xpub&callback=$callback_url&key=$key
and for example on testnet https://api.testnet.blockchain.info/v2/receive?xpub=$xpub&callback=$callback_url&key=$key
is there anybody know where the testnet api url is? Thanks,