Official agent skill

Vercel Sandbox

Vercel Sandbox guidance — ephemeral Firecracker microVMs for running untrusted code safely.

OfficialCustom licenceAuto-check: notesMarketing & SEO

Install Vercel Sandbox

skills CLI

$ npx skills add vercel/vercel-plugin --skill vercel-sandbox -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install vercel/vercel-plugin vercel-sandbox --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/vercel/vercel-plugin.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/vercel-sandbox .claude/skills/vercel-sandbox && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "vercel-sandbox" agent skill from https://github.com/vercel/vercel-plugin/tree/main/skills/vercel-sandbox into .claude/skills/vercel-sandbox/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vercel-sandbox", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/vercel/vercel-plugin/tree/main/skills/vercel-sandbox

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add vercel/vercel-plugin --skill vercel-sandbox -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install vercel/vercel-plugin vercel-sandbox --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/vercel/vercel-plugin.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/vercel-sandbox .agents/skills/vercel-sandbox && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "vercel-sandbox" agent skill from https://github.com/vercel/vercel-plugin/tree/main/skills/vercel-sandbox into .agents/skills/vercel-sandbox/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vercel-sandbox", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add vercel/vercel-plugin --skill vercel-sandbox -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install vercel/vercel-plugin vercel-sandbox --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/vercel/vercel-plugin.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/vercel-sandbox .cursor/skills/vercel-sandbox && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "vercel-sandbox" agent skill from https://github.com/vercel/vercel-plugin/tree/main/skills/vercel-sandbox into .cursor/skills/vercel-sandbox/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vercel-sandbox", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/vercel/vercel-plugin.git --path skills/vercel-sandbox

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add vercel/vercel-plugin --skill vercel-sandbox -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install vercel/vercel-plugin vercel-sandbox --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/vercel/vercel-plugin.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/vercel-sandbox .gemini/skills/vercel-sandbox && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "vercel-sandbox" agent skill from https://github.com/vercel/vercel-plugin/tree/main/skills/vercel-sandbox into .gemini/skills/vercel-sandbox/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vercel-sandbox", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install vercel/vercel-plugin vercel-sandbox

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add vercel/vercel-plugin --skill vercel-sandbox -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/vercel/vercel-plugin.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/vercel-sandbox .github/skills/vercel-sandbox && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "vercel-sandbox" agent skill from https://github.com/vercel/vercel-plugin/tree/main/skills/vercel-sandbox into .github/skills/vercel-sandbox/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vercel-sandbox", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add vercel/vercel-plugin --skill vercel-sandbox -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install vercel/vercel-plugin vercel-sandbox --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/vercel/vercel-plugin.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/vercel-sandbox .opencode/skills/vercel-sandbox && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "vercel-sandbox" agent skill from https://github.com/vercel/vercel-plugin/tree/main/skills/vercel-sandbox into .opencode/skills/vercel-sandbox/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vercel-sandbox", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: vercel-sandbox
GitHub stars: 301
Token cost: ~6.2k tokens
SKILL.md length: 2,129 words
Files: 3
Skills in repo: 38
Repo updated: Oct 7, 2026
First seen: Oct 7, 2026
Licence: Custom licence

At a glance

Vercel Sandbox guidance — ephemeral Firecracker microVMs for running untrusted code safely.

Executing user-generated
SKILL.md covers Install, Minimal example, Authentication and Creating a sandbox, plus 14 more sections
Calls vercel, apt-get and bash; reaches ai-gateway.vercel.sh; needs VERCEL_OIDC_TOKEN and VERCEL_TOKEN
AI-generated code in isolation

What it does

Vercel Sandbox is an agent skill from vercel/vercel-plugin, published by the product's own GitHub organization. Vercel Sandbox guidance — ephemeral Firecracker microVMs for running untrusted code safely. Supports AI agents, code generation, and experimentation. Use when executing user-generated or AI-generated code in isolation.

Its SKILL.md is about 6.2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `overlay.yaml`).

It sits in Marketing & SEO, covering A/B testing. It works with Vercel and Python. The repository describes itself as: Comprehensive Vercel ecosystem plugin — relational knowledge graph, skills for every major product, specialized agents, and Vercel conventions. Turns any AI agent into a Vercel…

When your agent uses it

Executing user-generated
AI-generated code in isolation

Example prompts

“/vercel-sandbox”

Requirements

Python 3
Node.js
A credential in VERCEL_OIDC_TOKEN
A credential in VERCEL_TOKEN

What it can do on your machine

Read from SKILL.md and the folder at commit 82fa491. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- vercel
- apt-get
- bash
- pnpm
From the folder's file list and the shell code blocks in SKILL.md.
Network
Hosts in commands or code, which the agent is likely to contact:
- ai-gateway.vercel.sh
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names these keys or tokens, usually read from environment variables:
- VERCEL_OIDC_TOKEN
- VERCEL_TOKEN
- API_SECRET
- AI_GATEWAY_API_KEY
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Vercel Sandbox loads about 6.2k tokens when it runs. Until then it costs about 58 tokens; SKILL.md has 2,129 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~58
When it runs · the whole SKILL.md, loaded when a task matches: ~6.2k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

NoteMentions a .env fileSKILL.md:132

v pull` to get a `VERCEL_OIDC_TOKEN` in `.env.local` (valid ~12h; re-pull when it expires).

NoteRuns commands with sudoSKILL.md:158

as a **non-root** user (`ubuntu`, in the sudo group) by default; pass `sudo: true` for root.

NoteRuns commands with sudoSKILL.md:167

// Root for one command (sudo is object-form only)

NoteRuns commands with sudoSKILL.md:296

sandbox/ubuntu` | Minimal Ubuntu 26.04 + sudo |

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 2,129 words (~6,227 tokens).

“Vercel Sandbox runs untrusted or AI-generated code inside an ephemeral Firecracker microVM. You get a real Linux VM with a filesystem and network — created on demand over an API, and stopped (or snapshotted) when you're done. Reach for it…”

— opening of SKILL.md by vercel, Custom licence

name: vercel-sandbox
summary: Run untrusted/AI-generated code in ephemeral Firecracker microVMs via @vercel/sandbox. Core loop: `const s = await Sandbox.create(); try { const r = await…
metadata.priority: 4
metadata.docs: https://vercel.com/docs/sandbox
metadata.sitemap: https://vercel.com/sitemap.xml
metadata.importPatterns: @vercel/sandbox
metadata.bashPatterns: \bnpm\s+(install|i|add)\s+[^\n]*@vercel/sandbox\b, \bpnpm\s+(install|i|add)\s+[^\n]*@vercel/sandbox\b, \bbun\s+(install|i|add)\s+[^\n]*@vercel/sandbox\b…
retrieval.aliases: code sandbox, microvm, isolated execution, safe code runner
retrieval.intents: run untrusted code, execute code safely, create sandbox, isolate code execution
retrieval.entities: Vercel Sandbox, Firecracker, microVM, isolated execution

Read the full SKILL.md on GitHub

Files

SKILL.md and 2 other files in skills/vercel-sandbox of vercel/vercel-plugin.

SKILL.md
.vercel.approvers
overlay.yaml

Open the folder on GitHubat commit 82fa491

Compare with similar skills

Vercel Sandbox next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Vercel Sandbox compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Vercel Sandbox this skillvercel/vercel-plugin	301	—	~6.2k	Automated safety check: Notes	Custom licence	yesterday
Ab Test Analysiskillvxk/pm-skills-zh	168	—	~480	Automated safety check: Pass	MIT	6 mo ago
A/B Test Analysisphuryn/pm-skills	27k	—	~893	Automated safety check: Pass	MIT	23 days ago
Ab Testingcoreyhaines31/marketingskills	54k	3 repos	~2.8k	Automated safety check: Pass	MIT	today
AnalyticsNexus-JPF/note-companion	870	7 repos	~2.2k	Automated safety check: Pass	MIT	yesterday
Ab Test Setupfreekmurze/dotfiles	1k	15 repos	~1.8k	Automated safety check: Pass	None	3 days ago

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Marketing & SEOAuto-check passed
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Questions about Vercel Sandbox

What does Vercel Sandbox do?

Vercel Sandbox guidance — ephemeral Firecracker microVMs for running untrusted code safely. Vercel Sandbox is an agent skill from vercel/vercel-plugin, published by the product's own GitHub organization. Vercel Sandbox guidance — ephemeral Firecracker microVMs for running untrusted code safely.

When should I use Vercel Sandbox?

Vercel Sandbox fits situations like: executing user-generated; AI-generated code in isolation.

How do I install Vercel Sandbox in Claude Code?

Run `npx skills add vercel/vercel-plugin --skill vercel-sandbox -a claude-code`. Or copy the skill folder (skills/vercel-sandbox in vercel/vercel-plugin) into .claude/skills/vercel-sandbox in your project. Claude Code loads it when a task matches its description.

How do I install Vercel Sandbox in Codex?

Run `npx skills add vercel/vercel-plugin --skill vercel-sandbox -a codex`. Or copy the skill folder (skills/vercel-sandbox in vercel/vercel-plugin) into .agents/skills/vercel-sandbox in your project. Codex loads it when a task matches its description.

Can I use Vercel Sandbox in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add vercel/vercel-plugin --skill vercel-sandbox -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/vercel-sandbox, .gemini/skills/vercel-sandbox, .github/skills/vercel-sandbox and .opencode/skills/vercel-sandbox in your project.

What does Vercel Sandbox need to run?

Going by SKILL.md and its folder, Vercel Sandbox needs the command-line tools its instructions call (vercel, apt-get, bash and pnpm) and credentials named VERCEL_OIDC_TOKEN, VERCEL_TOKEN, API_SECRET and AI_GATEWAY_API_KEY. Our summary lists: Python 3; Node.js; A credential in VERCEL_OIDC_TOKEN; A credential in VERCEL_TOKEN.

Does Vercel Sandbox access the network?

SKILL.md names 1 domain. In commands or code: ai-gateway.vercel.sh; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.

Is Vercel Sandbox safe to install?

Our automated static check of SKILL.md found notes only (mentions a .env file; runs commands with sudo), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Vercel Sandbox use?

Vercel Sandbox has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Vercel Sandbox use?

About 6.2k tokens (SKILL.md is roughly 25k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Vercel Sandbox?

Skills that share tags, products or a category with Vercel Sandbox: Ab Test Analysis (killvxk/pm-skills-zh, 168 stars), A/B Test Analysis (phuryn/pm-skills, 27k stars), Ab Testing (coreyhaines31/marketingskills, 54k stars) and Analytics (Nexus-JPF/note-companion, 870 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Vercel Sandbox?

vercel (a GitHub organization, an official publisher) maintains it in vercel/vercel-plugin, which has 301 GitHub stars. The repository holds 38 skills in this directory. The repository was last updated on October 7, 2026.

Source: vercel/vercel-plugin on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Vercel Sandbox

Install Vercel Sandbox

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Files

Compare with similar skills

Similar skills

Ab Test Analysis

A/B Test Analysis

Ab Testing

Analytics

Ab Test Setup

Ad Test Designer

More from vercel/vercel-plugin

Deployments Cicd

Plugin Audit

Vercel CLI

AI Gateway

Vercel Services

Access Protected Vercel Deployment

Questions about Vercel Sandbox

Install Vercel Sandbox

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Files

Compare with similar skills

Similar skills

More from vercel/vercel-plugin

Related

Questions about Vercel Sandbox