I decided to run strings on smilebasic's code.bin, and I found some interesting URLs and headers:
https://save.smilebasic.com/save2.php?A=%s&B=%s&C=%d&D=%u&E=US
__'X-Petc-ErrorCode
X-Petc-Rights
X-Petc-ECErrorCode
X-Petc-PubKey
X-Petc-UID
X-Petc-FileCount
X-Petc-MaxCount
X-Petc-FileSize
X-Petc-MaxSize
https://save.smilebasic.com/shoplist.php?A=%s&B=%s&C=%s&D=0
X-Petc-ErrorCode
X-Petc-UID
X-Petc-ItemCount
X-Petc-MaxLicenseTerm
X-Petc-GoldLicense
X-Petc-ECLimit%d
X-Petc-ECRefID%d
X-Petc-ECItemID%d
X-Petc-ECCaption%d
X-Petc-ECDesc%d
X-Petc-ECPrice%d
X-Petc-ECTax%d
https://load.smilebasic.com/load.php?A=%s&C=%s
https://load.smilebasic.com/load.php?B=%s&C=%s
X-Petc-ErrorCode
https://save.smilebasic.com/save2.php?A=%s&B=P%s&C=%d&D=%d&E=US
X-Petc-ErrorCode
X-Petc-Rights
X-Petc-ECErrorCode
X-Petc-PubKey
X-Petc-UID
X-Petc-FileCount
X-Petc-MaxCount
X-Petc-FileSize
X-Petc-MaxSize
https://save.smilebasic.com/show.php?A=%s&B=%s&C=%d
X-Petc-ErrorCode
https://load.smilebasic.com/load.php?A=%s&C=%s
https://load.smilebasic.com/load.php?B=%s&C=%s
X-Petc-ErrorCode
Content-Length
749a832a
https://save.smilebasic.com/prepurchase.php?A=%s&B=%s&C=%s&D=0
X-Petc-ErrorCode
X-Petc-ECPriceID
X-Petc-ECPriceFmt
X-Petc-ECPriceRaw
X-Petc-ECCurBalanceFmt
X-Petc-ECCurBalanceRaw
X-Petc-ECPostBalanceFmt
X-Petc-ECPostBalanceRaw
X-Petc-ECTotalFmt
X-Petc-ECTotalRaw
X-Petc-ECTaxFmt
X-Petc-ECTaxRaw
ParentalControlUGCErrorMsg
ParentalControlShopErrorMsg
https://save.smilebasic.com/list.php?A=%s
X-Petc-ErrorCode
X-Petc-FileCount
https://save.smilebasic.com/delete.php?A=%s&B=%s
X-Petc-ErrorCode
https://load.smilebasic.com/info.php?A=%s&C=%s
https://load.smilebasic.com/info.php?B=%s&C=%s
X-Petc-ErrorCode
X-Petc-ErrorCode
This appears to be URLs for gold:
https://npdl.cdn.nintendowifi.net/p01/nsa/WNcE0vrvCCO74nPV/ptc3nwe/info001
https://save.smilebasic.com/purchase.php?A=%s&B=%s&C=%lld&D=%s&E=%s&F=%s&G=%s&H=0
