In Qualtrics, exactly as you normally would.
1. Build your study as usual. Your questions stay exactly where they are.
2. You add the gate in the **Survey Flow**, not on a page, so nothing about your instrument changes.
You now have: a normal Qualtrics study.
In your [VerifyYou dashboard](https://platform.verifyyou.com/dashboard/verifications), open a verification and go to the **Integration** tab.
1. Make sure the method is **One-time passwords**. If it is set to something else, click **Switch method** and choose it.
2. Under **Your survey platform**, pick **Qualtrics**.
3. Paste your **Qualtrics survey link**.
4. Set **how many one-time passwords** you need, one per expected respondent. You can always generate more later.
5. Click **Connect survey**. We generate your passwords and hand back your study link.
You now have: your study link (share this one, not your Qualtrics link) and your one-time passwords. Click **Copy list** to copy them for the next step.
In Qualtrics's **Contacts** (called **XM Directory** on newer accounts).
1. Create a new contact list and choose **Manual input**.
2. Paste the one-time passwords you copied into the **External data reference** column, one per row. That column is the passcode slot: paste them under any other field and the gate will not pick them up.
You now have: a contact list where each code sits in External data reference and can authenticate exactly once.
Open your study's **Survey Flow**.
1. Add a **Set Embedded Data** element at the very top, with the single field `vypw` and no value. Qualtrics fills it from each respondent's link, their documented [query-string mechanism](https://www.qualtrics.com/support/survey-platform/survey-module/survey-flow/standard-elements/passing-information-through-query-strings/), so it should read "Value will be set from Panel or URL."
2. Add an **Authenticator** beneath it, which shows as **Branch on Successful Authentication**. Set **Authentication Type** to **Contact**, authenticate using **the contact list you just created**, set the authentication field to **External Data Reference**, tick **Pre-fill**, and enter `vypw`. Leave **"Allow authenticating respondents to retake authenticated section"** unchecked, which is the default: that is what makes each code one-time.
3. Put your survey blocks inside the authentication branch.
4. Add a second **Branch** ending in its own **End of Survey**, for anyone who does not authenticate. Qualtrics records a failed authentication as a complete by default, so this branch is what keeps failed and duplicate visitors out of your data.
Qualtrics's own [Authenticator](https://www.qualtrics.com/support/survey-platform/survey-module/survey-flow/advanced-elements/authenticator/) enforces the gate, and with Pre-fill a respondent with the right credentials "never even sees the authenticator."
You now have: a gate that opens itself for verified respondents and routes everyone else to a screen-out.
The link you hand out is the **study link from VerifyYou** (the `app.verifyyou.com/verification/...` one, from **Copy** in the dashboard), never your Qualtrics link. This is the whole point: the VerifyYou link sends every respondent through the face check first, then redirects the verified ones into your Qualtrics study with their one-time password already attached. Anyone who opens the raw Qualtrics link skips the check, so only ever share the VerifyYou link, in your panel, your sample provider, or your invite email.
You now have: a fielded study where everyone who reaches your questions came through the check. That's the whole setup.