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 MrTrenchTrucker/contak-browser-skills --skill browser-screenshotgit clone --depth 1 https://github.com/MrTrenchTrucker/contak-browser-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/mrtrenchtrucker/contak-browser-skills/browser-screenshot)<a href="https://agentmods.dev/skills/mrtrenchtrucker/contak-browser-skills/browser-screenshot"><img src="https://agentmods.dev/badge/skills/mrtrenchtrucker/contak-browser-skills/browser-screenshot/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/mrtrenchtrucker/contak-browser-skills/browser-screenshot"><img src="https://agentmods.dev/badge/skills/mrtrenchtrucker/contak-browser-skills/browser-screenshot.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 | $0.00020 | $0.00329 |
| Opus 5 | $0.00010 | $0.00164 |
| Sonnet 5 | $0.00004 | $0.00066 |
| Haiku 4.5 | $0.00002 | $0.00033 |
Grade A, and why
browser-screenshot 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 11d 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.
curl -s -X POST http://localhost:30001/screenshot \ What it actually says
Browser Screenshot
When invoked, capture a screenshot of the given URL via a Browserless Chromium service running locally or in your environment.
Inputs
url-- target page (required)viewport--{width, height}, default{1920, 1080}output_path-- local file path for the resulting PNG, default/tmp/screenshot.pngfull_page-- boolean, defaultfalse
Steps
- POST to
http://<host>:<port>/screenshotwith the URL and viewport in the request body. - Save the returned PNG bytes to
output_path. - Reference the saved path in your reply to the user.
Output
- File path to the PNG screenshot.
Example invocation
curl -s -X POST http://localhost:30001/screenshot \
-H 'Content-Type: application/json' \
-d '{
"url": "https://example.com",
"options": {"type": "png", "fullPage": false},
"viewport": {"width": 1920, "height": 1080}
}' \
-o /tmp/screenshot.png
Notes
- Browserless
/screenshotendpoint requires no authentication by default. - For the full setup guide (cross-host usage, troubleshooting, generating an SOP), see
sops/SOP_Headless_Browser_Screenshot.md.
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.
- 11d ago First seen · 39 lines · 20 tokens per session scan A 3cc21b2f1a61
browser-screenshot is a skill published in the GitHub repository MrTrenchTrucker/contak-browser-skills (5 stars, last pushed 4mo ago), licensed MIT. It adds 20 tokens to every session and 329 once invoked, about $0.0001 per session on Opus 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 2026-08-31.
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