curl --request POST \
  --url 'https://api.avax.network/ext/bc/P#platform.getBlockByHeight' \
  --header 'Content-Type: application/json' \
  --data '{
  "jsonrpc": "2.0",
  "method": "platform.getBlockByHeight",
  "params": {},
  "id": 1
}'

{
  "jsonrpc": "2.0",
  "result": {
    "block": "<string>",
    "encoding": "<string>"
  },
  "id": 1
}