"Invalid param: could not find account" when using solana.py to call solana RPC API function

Question

I need some help with solana.py API (for python). I am trying to get total supply of the token (token here) - so I copy mint address according to documentation (gettokensupply) and write usual code on solana==0.25.1:

 from solana.rpc.api import Client
 from solana.publickey import PublicKey
 http_client_solana = Client("https://api.devnet.solana.com")
 pubkey = PublicKey("CxwTQccajoiDn9Xb7BpTbvDQXEaSKNYQWMCUETiNgidZ")
 response = http_client_solana.get_token_supply(pubkey)

 amount = int(response["result"]['value']['amount'])
 decimals = response["result"]['value']['decimals']

But I receive a response:

{'jsonrpc': '2.0', 'error': {'code': -32602, 'message': 'Invalid param: could not find account'}, 'id': 1}

I don't understand what I am doing wrong, is it a problem on my end? I tried using it also with a coin address, but I still get the same error. I checked if I used exactly the mint and tried to call it using mentioned address in the example, but still receive the same error. I tried researching the problem, but found no hints.

Answer 1

Just change the devnet url to mainnet. That is, change https://api.devnet.solana.com to https://api.mainnet-beta.solana.com

Answer 2

I've tried the same with https://api.mainnet-beta.solana.com but same issue.

..
# Initialize the client
client = Client("https://api.mainnet-beta.solana.com")
...
token_mint_address = "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v"  # USDC mint address
token_mint_pubkey = Pubkey.from_string(token_mint_address)
...
response = client.get_token_account_balance(token_mint_pubkey,commitment='confirmed')

response gives me just the error message 'Invalid param: not a Token account' instead of a proper answer.

What am I doing wrong here?