I tried searching in different site but i am unable to find a proper solution to get the nft price and nft index price api can any one help me please?
Do you mean getting the price for a particular NFT token (tokenId)? You will likely need to use the API for the marketplace (e.g. OpenSea) where that particular NFT is listed.
I meant getting price of nft index across different market place. How about nftbank api .