# Access marker

Choose the URL marker that shows the widget on a site without login, and replace the link when it changes.

## Prerequisites

- **Authentication** set to **Site without login** (wizard: **Public site, no login**).
- **Site URL** saved under **Settings → Connection**, so the client link can be built.

**App with login** hides **Access marker**. The widget is shown from `data-token` instead. See [Auth methods](https://www.modifee.com/docs/client-access/auth-methods).

## Steps

Open **Settings → Client access**.

1. The field **Access marker** starts as `modifee`. The line under it is "The widget stays hidden until the client opens `/?modifee`", with your marker and an example URL.
2. Type another marker, or press **Generate random**. **Generate random** fills 24 letters and digits.
3. Press **Copy** to copy the full client link. The button then says "Copied".
4. Press **Save**.

A marker is 3 to 64 letters, numbers, underscores, or hyphens. The client link is the site URL plus `?` and the marker, for example `https://their-site.com/?modifee`.

Send that link. The widget checks the query against the saved marker, removes the marker from the address bar, and keeps the button visible while they browse that tab. **Ctrl+Shift+M** on the site shows the widget too. Use that while you are setting it up.

The marker only decides whether the button is visible. Anyone who has the link, or who uses **Ctrl+Shift+M**, can open the widget. Who can send a request is **Who can request changes?**. See [Allowed emails](https://www.modifee.com/docs/client-access/allowed-emails).

### Change the marker

1. Edit **Access marker** or press **Generate random**.
2. Press **Save**.
3. Confirm "The old link will stop working. Send the new link to your client."

The previous `?marker` no longer unlocks a new visit. Send the new link. A tab that already showed the widget keeps it until that browsing session ends.

## Verify

1. Open the site with no marker. The button stays hidden.
2. Open the copied link. The button appears, and the marker disappears from the URL.
3. Browse to another page in the same tab. The button stays.
4. After a change, the old link leaves the button hidden. The new link shows it.

## Troubleshooting

- "Use 3 to 64 letters, numbers, underscores, or hyphens."
- "That name is reserved. Choose another marker." Reserved names are `page`, `id`, `q`, `s`, `ref`, `fbclid`, `gclid`, and anything that starts with `utm_`.
- **Copy** stays disabled until **Site URL** can build a link. Save the URL under **Settings → Connection**.
- The button stays hidden on the plain site URL. That is the marker. Open the client link, or press **Ctrl+Shift+M**.
- The widget is visible and the email is rejected. The marker did its job. Add the address under [Allowed emails](https://www.modifee.com/docs/client-access/allowed-emails). The message is [MDF-AUTH-002](https://www.modifee.com/docs/errors/MDF-AUTH-002).
- [Widget not showing](https://www.modifee.com/docs/troubleshooting/widget-not-showing).