agent-browser is a command-line tool that lets AI agents control web browsers for tasks such as clicking, navigation, and screenshots. Developers use it to automate browser interactions from agent workflows.
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 vercel-labs/agent-browser --skill protected-vercel-deploymentsgit clone --depth 1 https://github.com/vercel-labs/agent-browserWrote 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/vercel-labs/agent-browser/protected-vercel-deployments)<a href="https://agentmods.dev/skills/vercel-labs/agent-browser/protected-vercel-deployments"><img src="https://agentmods.dev/badge/skills/vercel-labs/agent-browser/protected-vercel-deployments/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/vercel-labs/agent-browser/protected-vercel-deployments"><img src="https://agentmods.dev/badge/skills/vercel-labs/agent-browser/protected-vercel-deployments.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Snyk pass
- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium MCP Rug Pull · line 4 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
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 | $0.00075 | $0.01444 |
| Opus 5.5 | $0.00030 | $0.00578 |
| Sonnet 5.5 | $0.00015 | $0.00289 |
| Haiku 4.5 | $0.00007 | $0.00144 |
Grade A, and why
protected-vercel-deployments scanned grade A with 1 finding 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 1mo 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
- `vercel curl` is useful for HTTP requests, but it cannot render and interact with a page. How it starts
The opening of the file, as written. The whole thing — 111 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Protected Vercel deployments
Use the caller's existing Vercel identity and a short-lived OIDC token. Do not disable Deployment Protection, make the deployment public, or ask for a static bypass secret first.
Same-project preview
A local development token for the target project can access that project's protected Preview deployments through the default Trusted Sources self-access rule. No Trusted Sources configuration is normally required.
Confirm the local identity and Vercel CLI version:
vc whoami
vc --version
Require Vercel CLI 53.3.0 or newer before running vc project token. Versions 50.25.0 through 53.2.x write the token to stderr, so command substitution captures nothing and the credential can appear in logs. If the installed version is older, stop and ask the user to upgrade it. Do not attempt to capture or recover the token from stderr.
Set the target project and scope explicitly. If they cannot be inferred safely, ask the user. In a directory whose existing .vercel/project.json link has been verified against the target, vc project token without a project name is also valid. Do not run vc link merely to get an OIDC token: current Vercel CLI versions also pull development variables into .env.local when linking.
Create a named browser session, mint a development OIDC token with the Vercel CLI, then inject it without printing or persisting it:
export AGENT_BROWSER_SESSION="$(agent-browser session id --scope worktree --prefix vercel-preview)"
export VERCEL_PREVIEW_URL="https://my-app.vercel.app"
export VERCEL_PROJECT="my-app"
export VERCEL_SCOPE="my-team"
(
TOKEN="$(vc project token "$VERCEL_PROJECT" --scope "$VERCEL_SCOPE")"
test -n "$TOKEN"
agent-browser open "$VERCEL_PREVIEW_URL" --headers \
"{\"x-vercel-trusted-oidc-idp-token\":\"$TOKEN\"}"
)
agent-browser snapshot -i
Continue the normal workflow in that same session. The header is scoped to the target origin and applies to the document, scripts, styles, fonts, and in-page requests. If the browser session is closed or restarted, repeat the authenticated open command.
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.
- 1mo ago First seen · 111 lines · 75 tokens per session scan A 14c64d69da20
protected-vercel-deployments is a skill published in the GitHub repository vercel-labs/agent-browser (44,586 stars, last pushed today), licensed Apache-2.0. It adds 75 tokens to every session and 1,444 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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