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Chrome DevTools MCP (2025)

developer.chrome.com

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Re: Chrome DevTools MCP (2025)

#161

Post by 22c »

varenc wrote: post #89
dawnerd wrote: post #61

Earlier quoted context omitted.

Don’t know how this could be more stable than ytdlp. When issues come up they’re fixed really quickly.

yt-dlp was very recently broken for ~2 days for any Youtube videos that required cookies: https://github.com/yt-dlp/yt-dlp/issues/16212 Here is what actually fixed it: https://github.com/yt-dlp/ejs/pull/53/changes yt-dlp is relatively stable, but still occasionally breaks for long periods. I get the sense YouTube is becoming increasingly adversarial to yt-dlp as well. I don't know the details, but it doesn't seem lik…

> yt-dlp is running the entire YouTube JS+DOM environment

IIRC they maintain a minimal execution environment that is able to run just the JS needed to pass a few checks but this breaks too often enough that they're planning to make Node.js or another JS interpreter a hard requirement (possibly already happened).

Re: Chrome DevTools MCP (2025)

#162

Post by defrost »

22c wrote: post #161
varenc wrote: post #89

Earlier quoted context omitted.

yt-dlp was very recently broken for ~2 days for any Youtube videos that required cookies: https://github.com/yt-dlp/yt-dlp/issues/16212 Here is what actually fixed it: https://github.com/yt-dlp/ejs/pull/53/changes yt-dlp is relatively stable, but still occasionally breaks for long periods. I get the sense YouTube is becoming increasingly adversarial to yt-dlp as well. I don't know the details, but it doesn't seem lik…

> yt-dlp is running the entire YouTube JS+DOM environment IIRC they maintain a minimal execution environment that is able to run just the JS needed to pass a few checks but this breaks too often enough that they're planning to make Node.js or another JS interpreter a hard requirement (possibly already happened).

Pretty much - yt-dlp currently requires Deno to "solve" youtube challenges.

* https://deno.com/

* there may well be other JS interpreters that are accepted, can be used - but solving JS challenges is required for much, if not all, YT content.

Re: Chrome DevTools MCP (2025)

#163

Post by esperent »

tonyhschu wrote: post #26

Very cool. I do something like this but with Playwright. It used to be a real token hog though, and got expensive fast. So much so that I built a wrapper to dump results to disk first then let the agent query instead. https://uisnap.dev/ Will check this out to see if they’ve solved the token burn problem.

I use playwright CLI. Wrote a skill for it, and after a bit of tuning it's about 1-2k context per interaction which is fine. The key was that Claude only needs screenshots initially and then can query the dev tools for logs as needed.

Re: Chrome DevTools MCP (2025)

#164

Post by albert_e »

paulirish wrote: post #47

The DevTools MCP project just recently landed a standalone CLI: https://github.com/ChromeDevTools/chrome-devtools-mcp/blob/m... Great news to all of us keenly aware of MCP's wild token costs. ;) The CLI hasn't been announced yet (sorry guys!), but it is shipping in the latest v0.20.0 release. (Disclaimer: I used to work on the DevTools team. And I still do, too)

Woah got this for the first time.

> Too many requests

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Re: Chrome DevTools MCP (2025)

#165

Post by phantomathkg »

defen wrote: post #48
dataviz1000 wrote: post #43

I use Playwright to intercept all requests and responses and have Claude Code navigate to a website like YouTube and click and interact with all the elements and inputs while recording all the requests and responses associated with each interaction. Then it creates a detailed strongly typed API to interact with any website using the underlying API. Yes, I know it likely breaks everybody's terms of service but at the…

Would this hypothetically be able to download arbitrary videos from youtube without the constant yt-dlp arms race?

If it can save all the video/audio fragment and call ffmpeg to join them together. Maybe?

Re: Chrome DevTools MCP (2025)

#168

Post by bryanrasmussen »

llbbdd wrote: post #151
tclancy wrote: post #144

Earlier quoted context omitted.

So you’re that Hal Jordan then? Why would a Green Lantern feel the need to defend either? I feel like the Guardians would not accept your arguments as soon as you got to Oa, poozer. I guess what I am saying is don’t have a famous name. Seems obvious.

OP appears to be talking about real life. What are you on about?

the user name he is responding to is HalJordan, Hal Jordan is the name of a comic book superhero: Green Lantern, a moral paragon.

on edit: he is evidently being "sarcastic"

Re: Chrome DevTools MCP (2025)

#169

Post by eipi10_hn »

halJordan wrote: post #124
dataviz1000 wrote: post #43

I use Playwright to intercept all requests and responses and have Claude Code navigate to a website like YouTube and click and interact with all the elements and inputs while recording all the requests and responses associated with each interaction. Then it creates a detailed strongly typed API to interact with any website using the underlying API. Yes, I know it likely breaks everybody's terms of service but at the…

I love how HN is loving this idea when it's the exact same thing Anthropic and OpenAi (and every other llm maker) did. It's God's gift to them when it lets them bypass ads and dl copyrighted material. But it's Satan's curse on humanity when the Zuck does it to train his llm and dl copyrighted material.

I won't comment about dl but ads are trackers and spyware for me. I don't spy on websites' owners, I have my human rights to stop those trackers.

Zuck serves ads/spywares to other users, he deserves to taste his own medicines, not me.

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