curl --request POST \
  --url https://api.velumx.xyz/api/v1/estimate \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "network": "mainnet"
}
'

{
  "maxFee": "<string>",
  "maxFeeUsd": "<string>",
  "feeToken": "<string>",
  "relayerAddress": "<string>",
  "paymasterAddress": "<string>",
  "registryAddress": "<string>"
}