Before you choose a snippet, use [Choose your setup](/install/choose-setup/) or the [Lightning configurator](https://demo.lightning-consent.io/). Then make sure you have: | Thing | Where it comes from | | ---------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | **A license key** | The dashboard (or your operator). It looks like `k=8f3c…` and is baked into the script URL. It carries the `siteId`, so you usually don't set `siteId` in `init()`. | | **Authorised domains** | Registered against the site in the dashboard. The SDK only runs when the page's host matches; everything else is a harmless no-op. Add staging/preview hosts too (`localhost` is allowed for testing). | | **Head access** | You must be able to add markup to `` — ideally as the _first_ thing in it. Every [framework recipe](/install/frameworks/) is about getting that markup into your particular stack. | The hosted edge is `https://cmp.lightning-consent.io`. The script lives at `https://cmp.lightning-consent.io/v1/cmp.js?k=YOUR_LICENSE_KEY`. :::note[More detail coming] Fuller guidance is being migrated from `docs/INSTALL.md` § _“What you need before you start.”_ Next: [choose your setup](/install/choose-setup/), then continue to the [Quickstart](/quickstart/). :::