Hello i am developing some kind of marketplace i dont want to download whole blockchhain on my pc even in prune mode
anybody know any website which provide username password and api url so i can configure it with my application for testing perpose
QuickNode and GetBlock are two options. Also you can rent a server from any reputable vendor, install Bitcoin Core on it, and then add your own username and password to it so that once the blockchain is completely synced, you can query it privately.
It is not recommended to share RPC credentials because this will lead to the server getting DoS'ed. (denial of service attack)