@xASZx если я тебя не утомил ещё, подскажи)
curl http://localhost:8899 -X POST -H "Content-Type: application/json" -d '
{
"jsonrpc": "2.0",
"id": 1,
"method": "getTokenAccountsByOwner",
"params": [
"4Qkev8aNZcqFNSRhQzwyLMFSsi94jHqE8WNVTJzTP99F",
{
"mint": "3wyAj7Rt1TWVPZVteFJPLa26JmLvdb1CAKEFZm3NY75E"
},
{
"encoding": "jsonParsed"
}
]
}
'
Делаю всё на основе твоего прошло примера:

{"jsonrpc":"2.0","id":1,"method":"getTokenAccountsByOwner","params": ["7b5WgWjUaqizr6nsH2m6L9kKssnhbJtPtSySBHTWdnYj","mint":"TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA","encoding": "jsonParsed"]}
Ошибка: