skills/launchdarkly-flag-qualitative-feedback-setup/references/server-side-sdk-list.md

# Server-Side LaunchDarkly SDKs

These SDK package names indicate a **server-side** SDK. Qualitative feedback **cannot** be sent from server-side code.

| Package name | Platform |
|---|---|
| `@launchdarkly/node-server-sdk` | Node.js (current) |
| `launchdarkly-node-server-sdk` | Node.js (older) |
| `launchdarkly-server-sdk` | Python (PyPI) |
| Go SDK | Go |
| Java SDK | Java |
| Ruby SDK | Ruby |
| PHP SDK | PHP |
| Apex SDK | Apex |
| C++ server SDK | C++ (server) |
| .NET server SDK | .NET (server) |
| Erlang SDK | Erlang |
| Haskell SDK | Haskell |
| Lua SDK | Lua |
| Rust SDK | Rust |