@dandoen btw, just to better understand yhe error you had: are you exposing playwright MCP in the sa

@dandoen btw, just to better understand yhe error you had: are you exposing playwright MCP in the same worker that tries to consume it? Or do you have two different workers / apps, one as a playwright mcp server, and the other as a mcp client using ai-sdk?

RRui Figueira @dandoen btw, just to better understand yhe error you had: are you exposing play...

dandoen•7/28/25, 7:17 PM

two different workers!

Ddandoen two different workers!

Rui FigueiraOP•7/28/25, 8:36 PM

well, I would have to check that better, but nevertheless as I was saying , and because playwright-mcp basically has its toolset locally, there's no need to perform external calls. I did a small experiment of exposing a toolsetProvider, you can take a look at https://github.com/cloudflare/playwright-mcp/pull/20, check the example for usage (this depends on our merge of playwright-mcp 0.0.30 which was not released yet, we only released a new release of playwright today)

dandoen•7/28/25, 8:41 PM

that sounds great, i'll check it out.

dandoen•7/28/25, 8:44 PM

btw do you ever see cloudflare/playwright not force me to use the browser rendering api? i'd love to be able to use playwright-core inside workers to communicate with either my own CDP endpoint over ws or providers like browser base.

i noticed (at least the currently published 0.10 release) is doing a few things like overriding the host (setting a fake host), expecting session id query parameters to decide when to use connect (easy to bypass), checking for binding in the query param (easy to bypass) but also chunking the ws messages presumably due to limitation in the browser render api.

dandoen•7/28/25, 8:46 PM

i just spent the day patching playwright-core, in a similar way i saw ya'll had done it to make it work inside the worker runtime

Ddandoen btw do you ever see cloudflare/playwright not force me to use the browser render...

Rui FigueiraOP•7/28/25, 9:43 PM

for the time being it's not possible. We could in theory allow both scenarios, but from my experience, if the browser is not in the same network, we get lots of latency. For instance, a simple newPagenewPage call triggers 50 CDP calls, and if each takes 50ms, it's a full second just to open a new page

dandoen•7/28/25, 10:11 PM

true, but also depends on the customer use case whether 1s is acceptable or not. ie if it's an async job running in the background, then 1s doesn't really matter

danamajid•7/29/25, 2:33 PM

I'm also interested in this!

@Rui Figueira Would you be interested in supporting this?
https://github.com/cloudflare/playwright/pull/59

cc @dandoen

GitHub

feat: support connecting to ws directly by danamajid · Pull Reques...

This adds support for using any ws CDP based server to connect to, without breaking existing usage of the browser rendering api. Example usage with Browserbase:
import { Browserbase } from &#39...

Ddanamajid I'm also interested in this! @Rui Figueira Would you be interested in supportin...

danamajid•7/30/25, 6:28 PM

@Kathy curious if ya'll would be interested to make the @Cloudflare/playwright package work also for customers not using the browser rendering API (yet). by supporting this, you'll help me keep an easy migration path (back) to cloudflare

Attila-IBS•8/4/25, 11:18 AM

Hi, I found that using the /content endpoint we can not set the returned HTML type. Others like Crawl4ai allow us to set raw, cleaned HTML and markdown. I think CF should implement it.

hype•8/4/25, 8:11 PM

Is browser rendering extremely slow for anyone else to bootup/work?

hype•8/4/25, 8:11 PM

seeing extremely slow times.

AAttila-IBS Hi, I found that using the /content endpoint we can not set the returned HTML ty...

Kathy•8/6/25, 2:51 PM

you're looking for info to be returned in markdown? we have https://developers.cloudflare.com/browser-rendering/rest-api/markdown-endpoint/

Cloudflare Docs

/markdown - Extract Markdown from a webpage

The /markdown endpoint retrieves a webpage's content and converts it into Markdown format. You can specify a URL and optional parameters to refine the extraction process.

KKathy you're looking for info to be returned in markdown? we have https://developers.c...

Attila-IBS•8/7/25, 8:17 AM

Thank you, but I need the other 2 ones: raw HTML for getting invisible metadata and cleaned HTML for visible content. i think both Firecrawl and Crawl4ai features would inspire Browser Rendering PMs and devs a lot.

proxy•8/9/25, 1:58 AM

is Browser Rendering down? Been getting 503 error for the last 10 minutes

AAttila-IBS Thank you, but I need the other 2 ones: raw HTML for getting invisible metadata ...

Kathy•8/11/25, 6:37 PM

so our /html endpoint returns raw already today. So what we don't yet have for you is

cleaned

cleaned

html then.

can you explain what you'd like to do with

cleaned

cleaned

that

raw

raw

doesn't do for you?

Tttraenkler For me it is also quite slow. Is this to be expected @Kathy | Browser Rendering ...

hype•8/20/25, 8:54 AM

we ended up moving away

hype•8/20/25, 8:54 AM

used both playwright/puppeeter, don't think it makes any difference.

SmallShen•8/22/25, 11:18 AM

Can we have wrapped functions for rest api in worker bindings?

SSmallShen Can we have wrapped functions for rest api in worker bindings?

Kathy•8/25/25, 6:41 PM

is on the list

SmallShen•8/26/25, 12:45 AM

Does failed rest api calls (waitForTimeout exceeds) adds to billable browser hours?

SmallShen•8/26/25, 12:47 AM

Can we have browser hours used in the response of rest api?

SSmallShen Can we have browser hours used in the response of rest api?

Kathy•8/26/25, 3:37 PM

great idea. adding to the list

SSmallShen Does failed rest api calls (waitForTimeout exceeds) adds to billable browser ho...

Kathy•8/26/25, 3:37 PM

it does not

SmallShen•8/26/25, 6:13 PM

Is the rest api rate limit sliding window or fixed time period? I’m trying to adjust my backend concurrency settings.

SmallShen•8/26/25, 11:10 PM

Is it possible to make the /markdown api return both the original html and the extracted markdown? I'm building something that requires verifying results afterwards, which need a "snapshot" of original html dom (like wayback machine).

SSmallShen Is the rest api rate limit sliding window or fixed time period? I’m trying to ad...

Kathy•8/27/25, 5:21 PM

great q - will add to docs too

Rate limits are enforced with a fixed per second fill rate. For example, the workers paid limit of 60 requests per minute translates to 1 request per second. This means you cannot send all 60 requests at once; the API expects them to be spread evenly over the minute.

SSmallShen Is it possible to make the /markdown api return both the original html and the e...

Kathy•8/27/25, 5:22 PM

we have a separate /content endpoint for html https://developers.cloudflare.com/browser-rendering/rest-api/content-endpoint/. any reason that doesn't work for you?

Cloudflare Docs

/content - Fetch HTML

The /content endpoint instructs the browser to navigate to a website and capture the fully rendered HTML of a page, including the head section, after JavaScript execution. This is ideal for capturing content from JavaScript-heavy or interactive websites.

KKathy we have a separate /content endpoint for html https://developers.cloudflare.com/...

SmallShen•8/27/25, 5:34 PM

I don’t want to make 2 request for a single scrape. I’m thinking that for /json or /markdown endpoint, the original content is already available, could have an option to just return both json/markdown and original content.

gegi•8/29/25, 12:04 PM

Hello, is it allowed to scrap for example Instagram for their OG meta properties or does it break the Cloudflare rules?

KKathy we have a separate /content endpoint for html https://developers.cloudflare.com/...

Advany•9/1/25, 9:52 AM

how does one monitor the usage of the api? I only see how many requests its making to the api but not how much browser hours that consumed?

Advany•9/1/25, 9:56 AM

I just saw "Currently, the Cloudflare dashboard displays usage metrics exclusively for the Workers Bindings method. Usage data for the REST API is not yet available in the dashboard. We are actively working on adding REST API usage metrics to the dashboard.". How do I monitor my usage somewhere else?

Ggegi Hello, is it allowed to scrap for example Instagram for their OG meta properties...

gegi•9/1/25, 3:12 PM

Can anyone give me an answer to this question please :/

Martijn•9/1/25, 6:49 PM

Hi there! Since I'm not getting an answer in the #workers-help thingy, am I in the right place here to report this bug? Or am I doing something wrong?
workers-and-pages-helpFonts look bad in Browser Rendering screenshots

gegi•9/2/25, 1:15 PM

Does anyone use this api for retrieving the opengraph meta data of a website? Are there any configurations which I have to consider for best practice? Appreciate any help

Ggegi Does anyone use this api for retrieving the opengraph meta data of a website? Ar...

Kevin•9/2/25, 2:32 PM

Depends on a site but usually you don't need browser rendering to fetch opengraph. Just do simple http call to fetch html.

KKevin Depends on a site but usually you don't need browser rendering to fetch opengrap...

gegi•9/2/25, 3:18 PM

Instagram and Tiktok loads the opengraph dynamically

MMartijn Hi there! Since I'm not getting an answer in the #workers-help thingy, am I in t...

Kathy•9/3/25, 12:13 AM

hmm might be an unsupported font. let me get a list of fonts we currently support. do you know what font it is?

AAdvany how does one monitor the usage of the api? I only see how many requests its maki...

Kathy•9/3/25, 12:42 AM

when using the rest api you can see the browser time used for every request in the

X-Browser-Ms-Used

X-Browser-Ms-Used

header

ah i need to update that in the docs. thanks for reminding

KKathy hmm might be an unsupported font. let me get a list of fonts we currently suppor...

Martijn•9/3/25, 8:25 AM

One example is the google font Poppins

Kathy•9/4/25, 7:01 PM

got it, yea looks like it's not a supported font right now. would you be able to use one of the ones here instead? https://kathayl-patch-9.preview.developers.cloudflare.com/browser-rendering/reference/supported-fonts/

Cloudflare Docs

Supported fonts

Browser Rendering uses a managed Chromium environment that includes a standard set of fonts. When you generate a screenshot or PDF, text is rendered using the fonts available in this environment.

Johndoer•9/11/25, 2:29 PM

Hey i was trying to use the Rest API enpoint /content to get client side rendered content from Algolias instantsearch. I tried everything but i didn't get any items.

JJohndoer Hey i was trying to use the Rest API enpoint /content to get client side rendere...

Kathy•9/11/25, 5:32 PM

what url/what was the request? what response did you get?

gegi•9/12/25, 2:38 PM

Hello, I want to generate url previews with opengraph meta tags but is using the browser rendering api the right approach for dynamic websites?

Diaz•Olvera•Co•9/15/25, 8:28 PM

so can I say automate some clicks for online courses

Diaz•Olvera•Co•9/15/25, 8:29 PM

something simple like everytime it autoplays to the next video I need to manually hit fullscreen

@dandoen btw, just to better understand yhe error you had: are you exposing playwright MCP in the sa

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