Every documented endpoint works with a plain HTTP client. Official packages are not currently published. Established key + action reseller SDKs can use NotPanel by changing the base URL; optional v3 actions and fields can be adopted without breaking the familiar core calls.
Point a generic key + action reseller SDK at https://notpanel.com/api/v3 and keep its familiar core calls. Optional request_id, advanced catalog, refund quote, bulk operations, richer metadata, and signed webhooks are additive upgrades. If you need help, open a ticket from the contact page with the SDK and call details.
Community SDKs are welcome. The reference pages on this site are the authoritative spec — anything that round-trips correctly against them is a valid SDK. We're happy to link well-maintained community packages from this page; reach out via support@notpanel.com with a link.