How do I install the Duckdns Url Bookmark skill?

Run npx skillmds@latest add therocksss/duckdns-url-bookmark in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Duckdns Url Bookmark safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Duckdns Url Bookmark?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Duckdns Url Bookmark free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Duckdns Url Bookmark?

THEROCKSSS (@therocksss) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Duckdns Url Bookmark by therocksss — Agent Skill

Name: Duckdns Url Bookmark
Author: THEROCKSSS

Duckdns Url Bookmark

USER-INVOKED. Bookmark any URL -- a DuckDNS domain of your own or anything else -- so it appears as a link on the VPN-egress GUI status page AND becomes part of the outside-the-network sweep. Use when the user says 'bookmark this URL', '/duckdns-url-bookmark', 'add this to my bookmarks', 'add this domain to the sweep', or hands over a URL they want tracked. Also covers listing, removing, and checking bookmarks from the external vantage point.

THEROCKSSS Updated Sep 17, 2026

File contents

DuckDNS URL Bookmark

Bookmark a URL once; get two things.

It renders as a link on the status page at :3081, inside the browser that exits through the Mullvad tunnel — so it is one click from a genuine outside-the-network view.
It joins the sweep, so check-domains.js tests it from that same exit without anyone maintaining a second list.

That is the whole reason bookmarks live in a file rather than in a browser profile: a browser bookmark only helps a human, and only on one machine.

Bookmark something

cd projects/vpn-egress
bash tools/bookmark.sh add <url>

Takes several URLs at once. A bare hostname is fine — example.com becomes https://example.com. Duplicates are ignored rather than erroring.

bash tools/bookmark.sh list
bash tools/bookmark.sh remove <url>

Check a bookmark from outside

bash tools/bookmark.sh check              # every bookmark
bash tools/bookmark.sh check <url>        # just one

This runs the normal tunnel-gated path, so the result carries the exit IP it came from — and refuses to report anything if egress can't be confirmed. Read the exit code the usual way: 0 reachable, 1 checked and down, 2 no answer obtained (never "the site is down").

Rules that matter

Only http and https are accepted. The status page assigns each entry straight to a link's href, and that page is the one origin holding the exit IP and the whole bookmark list. A javascript: or data: entry would execute there. The tool refuses anything else — don't work around it.

The list is gitignored, and must stay that way. It lives at scripts/local/domains.json. This repo is publicly mirrored, and which domains you own — plus which are currently broken — is an inventory that should not be published. Never move it to a tracked path, never paste the list into an issue, and never commit it.

Changes appear on the status page within ~15 seconds. The page polls; no restart needed. If a bookmark doesn't show up, the file is probably not valid JSON — tools/bookmark.sh list will say so, where the status page just shows an empty state.

No host Node required. The tool uses host node when present, and otherwise does the edit in a throwaway node:22-alpine container labelled lab.ephemeral=true that removes itself.

vpn-egress-testing — checking a specific URL, the common case.
vpn-egress-setup — the stack won't start.
projects/vpn-egress/docs/USAGE.md — reading a check result properly.

---name: duckdns-url-bookmarkdescription: USER-INVOKED. Bookmark any URL -- a DuckDNS domain of your own or anything else -- so it appears as a link on the VPN-egress GUI status page AND becomes part of the outside-the-network sweep. Use when the user says 'bookmark this URL', '/duckdns-url-bookmark', 'add this to my bookmarks', 'add this domain to the sweep', or hands over a URL they want tracked. Also covers listing, removing, and checking bookmarks from the external vantage point.---# DuckDNS URL BookmarkBookmark a URL once; get two things.1. It renders as a link on the **status page** at `:3081`, inside the browser that exits through the Mullvad tunnel — so it is one click from a genuine outside-the-network view.2. It joins the **sweep**, so `check-domains.js` tests it from that same exit without anyone maintaining a second list.That is the whole reason bookmarks live in a file rather than in a browserprofile: a browser bookmark only helps a human, and only on one machine.## Bookmark something```bashcd projects/vpn-egressbash tools/bookmark.sh add <url>```Takes several URLs at once. A bare hostname is fine — `example.com` becomes`https://example.com`. Duplicates are ignored rather than erroring.```bashbash tools/bookmark.sh listbash tools/bookmark.sh remove <url>```## Check a bookmark from outside```bashbash tools/bookmark.sh check # every bookmarkbash tools/bookmark.sh check <url> # just one```This runs the normal tunnel-gated path, so the result carries the exit IP itcame from — and refuses to report anything if egress can't be confirmed. Readthe exit code the usual way: `0` reachable, `1` checked and down, **`2` noanswer obtained** (never "the site is down").## Rules that matter**Only `http` and `https` are accepted.** The status page assigns each entrystraight to a link's `href`, and that page is the one origin holding the exitIP and the whole bookmark list. A `javascript:` or `data:` entry would executethere. The tool refuses anything else — don't work around it.**The list is gitignored, and must stay that way.** It lives at`scripts/local/domains.json`. This repo is publicly mirrored, and whichdomains you own — plus which are currently broken — is an inventory thatshould not be published. Never move it to a tracked path, never paste thelist into an issue, and never commit it.**Changes appear on the status page within ~15 seconds.** The page polls; norestart needed. If a bookmark doesn't show up, the file is probably not validJSON — `tools/bookmark.sh list` will say so, where the status page just showsan empty state.**No host Node required.** The tool uses host `node` when present, andotherwise does the edit in a throwaway `node:22-alpine` container labelled`lab.ephemeral=true` that removes itself.## Related- `vpn-egress-testing` — checking a specific URL, the common case.- `vpn-egress-setup` — the stack won't start.- `projects/vpn-egress/docs/USAGE.md` — reading a check result properly.

Frequently asked questions