Hey @dandoen ! We're working on upgrading playwright to a latest version. Actually, our main branch

Hey @dandoen ! We're working on upgrading playwright to a latest version. Actually, our main branch is already in sync with playwright 1.53.0, but are still adding a few more things before releasing

Rui FigueiraOP•7/24/25, 6:47 PM

regarding playwright-mcp, and to avoid significant changes in the upstream code, we keep a cloudflare folder where all workers logic is, and it also imports our @cloudflare/playwright dependency

GitHub

playwright-mcp/cloudflare/package.json at 65e09d9efb188e277022bffe9...

Playwright MCP fork that works with Cloudflare Browser Rendering - cloudflare/playwright-mcp

RRui Figueira Hey @dandoen ! We're working on upgrading playwright to a latest version. Actual...

dandoen•7/24/25, 6:58 PM

fantastic, i'll give it a shot to use cloudflare/playwright@main instead as i need some latest features (like the private method _snapshotForAI)

Ddandoen fantastic, i'll give it a shot to use cloudflare/playwright@main instead as i ne...

Rui FigueiraOP•7/24/25, 6:59 PM

nice! I'll try to accelerate those upgrades

RRui Figueira nice! I'll try to accelerate those upgrades

dandoen•7/24/25, 7:00 PM

you rock, thank you. i'll keep you posted how it goes!

RRui Figueira nice! I'll try to accelerate those upgrades

dandoen•7/24/25, 7:10 PM

actually would it be easy to get a -next release or so? happy to be a guinea pig

Ddandoen actually would it be easy to get a -next release or so? happy to be a guinea pig

Kathy•7/24/25, 7:51 PM

what's your use case? and what latest features are you most interested in+why?

dandoen•7/24/25, 9:08 PM

@Kathy running my own browser DO from which i have my ai agent make tool calls, so can’t use playwright-mcp (violates the DOs i/o rules). hence need to do a few things similar to what playwright mcp dus just in my own service logic (like leveraging private apis from newer versions of playwright to get the accessibility tree for AI). in addition i couldn’t get a few cdp things to work on the 0.11 version, so hoping upgrade would help

hope that helps!

JJames agreed, can we get some attention on this one please @Kathy ?

James•7/24/25, 10:33 PM

Another ping for this one @Kathy, thanks

dandoen•7/25/25, 1:32 PM

hello team, when using the cloudflare's playwright mcp from another worker i run into this:

Error: page.goto: Cannot perform I/O on behalf of a different Durable Object. I/O objects (such as streams, request/response bodies, and others) created in the context of one Durable Object cannot be accessed from a different Durable Object in the same isolate. This is a limitation of Cloudflare Workers which allows us to improve overall performance. (I/O type: Native)

note the original request to the mcp isn't made from a DO, so i'm not sure where this is coming from and what i can do to mitigate.

JJames Another ping for this one @Kathy, thanks

Kathy•7/25/25, 4:59 PM

had been in progress! https://github.com/cloudflare/puppeteer/releases/tag/v1.0.4

now done thanks to @Rui Figueira

GitHub

Release v1.0.4 · cloudflare/puppeteer

What's Changed

Upgrade to puppeteer v22.13.1 in #132

Full Changelog: https://github.com/cloudflare/puppeteer/compare/v1.0.3..v1.0.4

KKathy had been in progress! https://github.com/cloudflare/puppeteer/releases/tag/v1.0....

James•7/25/25, 5:09 PM

thanks! :MeowHeartCloudflare:

Ddandoen hello team, when using the cloudflare's playwright mcp from another worker i run...

dandoen•7/25/25, 5:32 PM

@Kathy qq is the playwright-mcp not designed to be used in combination with other cloudflare workers or am i missing something? works greatly when using it as an mcp w/ claude desktop, cursor etc but seems odd to not be able to use it with the agent sdk/vercel's ai sdk running inside cloudflare!

Ddandoen hello team, when using the cloudflare's playwright mcp from another worker i run...

Rui FigueiraOP•7/25/25, 6:03 PM

can you provide a code snippet for me to test it?

dandoen•7/25/25, 6:06 PM

https://ai-sdk.dev/docs/reference/ai-sdk-core/create-mcp-client

deploy this snippet from the example to a worker. just instead of type stdio, set type to sse and provide url = other worker url that serves the playwright mcp

experimental_createMCPClient

Create a client for connecting to MCP servers

Ddandoen https://ai-sdk.dev/docs/reference/ai-sdk-core/create-mcp-client deploy this sni...

Rui FigueiraOP•7/25/25, 6:31 PM

hmm, I see... but maybe you can do that without creating the MCP server, because at the end you just need the tools, right?

RRui Figueira hmm, I see... but maybe you can do that without creating the MCP server, because...

dandoen•7/25/25, 7:35 PM

i guess not ideal (i’d love to separate and in my app users can bring their own mcp servers so it may be hosted on CF) .but i can give it a try.. any guidance on how to use the mcp lib without creating the server?

Ccamden Another thing... I would really like to be able to get the title of the page, I'...

Kathy•7/25/25, 9:30 PM

heads up - content endpoint was updated. and now returns title https://developers.cloudflare.com/api/resources/browser_rendering/subresources/content/methods/create/#(params)%200%20%3E%20(param)%20rejectRequestPattern%20%3E%20(schema)

Cloudflare API | Browser Rendering › Content › Get HTML Content

Interact with Cloudflare's products and services via the Cloudflare API

Ddandoen i guess not ideal (i’d love to separate and in my app users can bring their own ...

dandoen•7/25/25, 9:57 PM

correct me if i'm wrong but i only see

createMcpAgent

createMcpAgent

exposing the serve and mount methods. no way to actually use just the tools?

Ddandoen correct me if i'm wrong but i only see `createMcpAgent` exposing the serve and m...

Rui FigueiraOP•7/25/25, 10:48 PM

yes, right now without changes to the library it's not trivial, but all tools are available in playwright-mcp internal code

RRui Figueira yes, right now without changes to the library it's not trivial, but all tools ar...

dandoen•7/26/25, 12:13 PM

ok, thx. i'm going w/ browserbase for now,

Ddandoen ok, thx. i'm going w/ browserbase for now,

Rui FigueiraOP•7/28/25, 5:14 PM

@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

newPage

newPage

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.

Hey @dandoen ! We're working on upgrading playwright to a latest version. Actually, our main branch

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