What is open-browser?

A skill for controlling a real Chrome browser through a local service. It supports tasks involving rendered pages, clicks, typing, scrolling, dialogs, and multi-step navigation.

Use it to inspect live pages, fill forms, click through websites, handle dialogs, scrape rendered content, or reproduce browser-only behavior.

It handles website tasks that cannot be completed reliably from page source alone, such as JavaScript-rendered pages or interactive forms.

open-browser — Skill for Claude Code and Codex by softpudding

Install

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.

Any agent

npx skills add softpudding/OpenBrowser --skill open-browser

Clone the repo

git clone --depth 1 https://github.com/softpudding/OpenBrowser

Made for: Claude Code, Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/softpudding/openbrowser/open-browser/github.svg)](https://agentmods.dev/skills/softpudding/openbrowser/open-browser)

Your own site

<a href="https://agentmods.dev/skills/softpudding/openbrowser/open-browser"><img src="https://agentmods.dev/badge/skills/softpudding/openbrowser/open-browser/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/softpudding/openbrowser/open-browser"><img src="https://agentmods.dev/badge/skills/softpudding/openbrowser/open-browser.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 92 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,124 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.

Origin unknown No closer match found in the catalogue.

Token cost

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	$0.00092	$0.02124
Opus 5.5	$0.00037	$0.00850
Sonnet 5.5	$0.00018	$0.00425
Haiku 4.5	$0.00009	$0.00212

Measured 2mo ago against content hash b5c4aa62d746, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

open-browser 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 2mo ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/check_status.py, scripts/send_task.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

- Simple API calls — use `curl` or the WebFetch tool

skill/claude/open-browser/SKILL.md · 216 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Files

What ships with it

5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

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.

2mo ago First seen · 216 lines · 92 tokens per session scan A b5c4aa62d746

Subscribe to this mod's changes

open-browser is a skill published in the GitHub repository softpudding/OpenBrowser (193 stars, last pushed 5mo ago), with no licence file. It adds 92 tokens to every session and 2,124 once invoked, about $0.0004 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.

Browser automation

open-browser next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
open-browsersoftpudding/OpenBrowser	Skill	193	5mo ago	none	A	92	Claude Code, Codex
interactive-loginyc-software/qm	Skill	16k	yesterday	MIT	A	46	Claude Code, Codex
pinchtab-mcppinchtab/pinchtab	Skill	11k	10d ago	MIT	A	52	Claude Code, Codex
azure-messaging-webpubsub-javamicrosoft/skills	Skill	3.2k	yesterday	MIT	A	43	Claude Code
cua-driverdavidondrej/skills	Skill	4.3k	3d ago	MIT	A	68	Claude Code, Codex
open-design-browsercompozy/compozy	Skill	2.8k	yesterday	MIT	A	56	Claude Code, Codex
southwestborski/travel-hacking-toolkit	Skill	895	yesterday	MIT	A	40	Claude Code