Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add ariana-dot-dev/cloud-sandbox-vm-skills --skill public-url-hostinggit clone --depth 1 https://github.com/ariana-dot-dev/cloud-sandbox-vm-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/ariana-dot-dev/cloud-sandbox-vm-skills/public-url-hosting)<a href="https://agentmods.dev/skills/ariana-dot-dev/cloud-sandbox-vm-skills/public-url-hosting"><img src="https://agentmods.dev/badge/skills/ariana-dot-dev/cloud-sandbox-vm-skills/public-url-hosting/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/ariana-dot-dev/cloud-sandbox-vm-skills/public-url-hosting"><img src="https://agentmods.dev/badge/skills/ariana-dot-dev/cloud-sandbox-vm-skills/public-url-hosting.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00085 | $0.00449 |
| Opus 5 | $0.00043 | $0.00225 |
| Sonnet 5 | $0.00017 | $0.00090 |
| Haiku 4.5 | $0.00009 | $0.00045 |
Grade C, and why
public-url-hosting scanned grade C with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Downloads and executes remote codehighSupply chain
curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.
`curl -fsSL https://box.ascii.dev/install | sh`, then `box login "$BOX_API_KEY" --json`. Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
`curl -fsSL https://box.ascii.dev/install | sh`, then `box login "$BOX_API_KEY" --json`. What it actually says
Public URL hosting (Box)
Use this to put a running service on the public internet from inside a Box: a web app, an API, a demo, or a long-lived endpoint. Box handles TLS, routing, and auth — no DNS, no certificates, no separate platform.
Recipe
box_id="$(box new --no-auto-stop --json | jq -r 'select(.event == "ready") | .id')"
box ssh "$box_id" -- bash -s < ./deploy.sh # build + start app on 0.0.0.0:8080
box ssh "$box_id" -- "host 8080 --public --title 'my app'"
box ssh "$box_id" -- "host url 8080" # https://<box>-8080.on.ascii.dev
host URLs are token-gated by default; --public makes them open. A dedicated IPv4 + full TCP/UDP means you can also point your own domain or host non-HTTP services.
Why Box
- Zero infra — TLS + subdomain + auth managed for you.
- Stays up —
--no-auto-stopkeeps the host alive 24-7; persists across resume. - Cheap — per-second billing, ~10× cheaper than typical sandbox/host providers.
Prereqs
curl -fsSL https://box.ascii.dev/install | sh, then box login "$BOX_API_KEY" --json.
Limits
EU-only; 100 active VMs soft cap. For multi-region CDN-grade hosting, use a dedicated host; Box is best for single-VM services, previews, and demos.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 12d ago First seen · 34 lines · 85 tokens per session scan C 1b39eed9ae6c
public-url-hosting is a skill published in the GitHub repository ariana-dot-dev/cloud-sandbox-vm-skills (2 stars, last pushed 3mo ago), licensed MIT. It adds 85 tokens to every session and 449 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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