Cloudflare Browser Run MCP server
24 operations0 webhooks
Render and inspect pages, capture screenshots and PDFs, crawl sites, and manage Browser Rendering sessions and targets through REST.
Use Cloudflare Browser Run in Claude, ChatGPT, Cursor or another MCP client
Connect Cloudflare Browser Run once in Corsair, then add one MCP address to your agent.
Building your own app on the Corsair SDK? Get API keys
Try Cloudflare Browser Run with your agent
Connect Cloudflare Browser Run, then paste this into Claude, ChatGPT or Cursor. For ideas from other apps, see the use cases.
Using Corsair, show me what you can do in Cloudflare Browser Run on my account, then run one read-only example and show me the result.
Cloudflare Browser Run tools and triggers
Tools are what your agent can do in Cloudflare Browser Run through Corsair's MCP server. Triggers are the Cloudflare Browser Run events a routine can start from.
Browser
- CloseWrite
Close a Browser Rendering session: https://developers.cloudflare.com/api/resources/browser_rendering/subresources/devtools/subresources/browser/methods/delete/.
browser.close
- CreateDestructive
Acquire a browser session with optional guardrails: https://developers.cloudflare.com/api/resources/browser_rendering/subresources/devtools/subresources/browser/methods/create/.
browser.create
- Live View.CreateWrite
Mint time-limited browser live-view URLs: https://developers.cloudflare.com/api/resources/browser_rendering/subresources/devtools/subresources/browser/subresources/live_view/methods/create/.
browser.liveView.create
- ProtocolRead-only
Retrieve the dynamic Chrome DevTools Protocol schema: https://developers.cloudflare.com/api/resources/browser_rendering/subresources/devtools/subresources/browser/methods/protocol/.
browser.protocol
- VersionRead-only
Get browser and DevTools version metadata: https://developers.cloudflare.com/api/resources/browser_rendering/subresources/devtools/subresources/browser/methods/version/.
browser.version
Targets
- ActivateWrite
Activate a browser target: https://developers.cloudflare.com/api/resources/browser_rendering/subresources/devtools/subresources/browser/subresources/targets/methods/activate/.
targets.activate
- CloseWrite
Close a browser target: https://developers.cloudflare.com/api/resources/browser_rendering/subresources/devtools/subresources/browser/subresources/targets/methods/close/.
targets.close
- CreateWrite
Open a browser tab: https://developers.cloudflare.com/api/resources/browser_rendering/subresources/devtools/subresources/browser/subresources/targets/methods/create/.
targets.create
- GetRead-only
Get a debuggable target by ID: https://developers.cloudflare.com/api/resources/browser_rendering/subresources/devtools/subresources/browser/subresources/targets/methods/get/.
targets.get
- ListRead-only
List debuggable browser targets: https://developers.cloudflare.com/api/resources/browser_rendering/subresources/devtools/subresources/browser/subresources/targets/methods/list/.
targets.list
Crawl
- CancelWrite
Cancel an active crawl job: https://developers.cloudflare.com/browser-run/quick-actions/crawl-endpoint/.
crawl.cancel
- GetRead-only
Get crawl status or paginated results: https://developers.cloudflare.com/browser-run/quick-actions/crawl-endpoint/.
crawl.get
- StartDestructive
Start an asynchronous site crawl: https://developers.cloudflare.com/browser-run/quick-actions/crawl-endpoint/.
crawl.start
Sessions
- GetRead-only
Get details for a Browser Rendering session: https://developers.cloudflare.com/api/resources/browser_rendering/subresources/devtools/subresources/session/methods/get/.
sessions.get
- ListRead-only
List active Browser Rendering sessions: https://developers.cloudflare.com/api/resources/browser_rendering/subresources/devtools/subresources/session/methods/list/.
sessions.list
Accessibility Tree
- CaptureRead-only
Capture a page accessibility tree: https://developers.cloudflare.com/browser-run/quick-actions/accessibility-tree-endpoint/.
accessibilityTree.capture
Content
- FetchRead-only
Fetch rendered HTML through Browser Run Quick Actions: https://developers.cloudflare.com/browser-run/quick-actions/content-endpoint/.
content.fetch
Json
- ExtractRead-only
Extract structured page data using a prompt or JSON schema: https://developers.cloudflare.com/browser-run/quick-actions/json-endpoint/.
json.extract
Links
- ListRead-only
Retrieve links from a rendered page: https://developers.cloudflare.com/browser-run/quick-actions/links-endpoint/.
links.list
Markdown
- ConvertRead-only
Convert rendered page content to Markdown: https://developers.cloudflare.com/browser-run/quick-actions/markdown-endpoint/.
markdown.convert
- RenderDestructive
Render a page to JSON-safe base64 PDF data: https://developers.cloudflare.com/browser-run/quick-actions/pdf-endpoint/.
pdf.render
Scrape
- ExtractRead-only
Extract selected HTML elements: https://developers.cloudflare.com/browser-run/quick-actions/scrape-endpoint/.
scrape.extract
Screenshot
- CaptureDestructive
Capture a screenshot as JSON-safe base64 data: https://developers.cloudflare.com/browser-run/quick-actions/screenshot-endpoint/.
screenshot.capture
Snapshot
- CaptureDestructive
Capture multiple page formats in one request: https://developers.cloudflare.com/browser-run/quick-actions/snapshot/.
snapshot.capture
Connect Cloudflare Browser Run to Claude, ChatGPT or Cursor
- 1
Connect Cloudflare Browser Run in Corsair
Add your Cloudflare Browser Run API key once in Corsair. Corsair stores the credential encrypted and makes the Cloudflare Browser Run API calls for your agent, so it never goes into a prompt or a config file. Connect Cloudflare Browser Run
If your link lets the agent add apps, you can skip this: it gives you a sign-in link the first time it needs Cloudflare Browser Run. On a ChatGPT personal plan, connect Cloudflare Browser Run here first.
- 2
Add Corsair's MCP server to your agent
Every client uses the same address:
https://mcp.corsair.dev/mcpOpen Customize → Connectors → Add custom connector, paste the address, then select Connect.Add a custom MCP server with the address and choose OAuth. Personal plans get read tools only.Add to CursorOr add this to~/.cursor/mcp.json. Cursor opens Corsair to sign in the first time it connects.{ "mcpServers": { "corsair": { "url": "https://mcp.corsair.dev/mcp" } } }Run this, then run/mcpin Claude Code to sign in.claude mcp add --transport http corsair https://mcp.corsair.dev/mcpCodex, Gemini CLI, VS Code, Zed and other clients with OAuth sign-in work the same way. Clients without it, such as GitHub Copilot's coding agent, use a link's own address and an API key. Setup for every client
- 3
Sign in and choose what needs your approval
Your client opens Corsair to sign in. Pick a link: the apps your agent can use and a mode that decides what it may do without asking. In the default Cautious mode, Cloudflare Browser Run's read and write operations run right away and its 5 destructive operations wait for your approval. Strict mode asks before every write and refuses destructive operations, and Read mode allows reads only.
FAQ
Install corsair and @corsair-dev/cloudflarebrowserrendering, add the Cloudflare Browser Run plugin, and connect with an API key. Then call methods like corsair.cloudflarebrowserrendering.api.accessibilityTree.capture() from your app. Corsair keeps each tenant isolated.
Yes. Cloudflare Browser Run requires an API key from your Cloudflare Browser Run account or developer dashboard. Create credentials with access that matches what you automate, then paste them into Corsair or connect through managed auth in Hub.
Yes. One Corsair client can hit Cloudflare Browser Run, GitHub, Notion, Stripe, and the rest. Trigger Cloudflare Browser Run from a webhook, push updates to Slack, or chain actions across plugins. Same tenant context across integrations, plain TypeScript.
Teams use Corsair for render and inspect pages, capture screenshots and PDFs, crawl sites, and manage Browser Rendering sessions and targets through REST. Common builds include sync jobs, admin tooling, and agents that call Cloudflare Browser Run APIs from your backend.
The SDK is open source. Self-host and you pay Corsair nothing for the integration layer. Hub bills for hosted auth and execution, not per Cloudflare Browser Run API call. Hub has a generous free tier. For hobby projects you can probably run the whole thing on free. Paid plans start to matter with more tenants or heavier traffic.
We maintain @corsair-dev/cloudflarebrowserrendering in the open repo. When Cloudflare Browser Run ships API changes, upgrade the package. Your call sites stay typed. You should not need to rewrite the integration layer each time.
No. Corsair does not read your Cloudflare Browser Run data or hold individual access credentials. Credentials stay in your database. API calls run on your instance. We do not store Cloudflare Browser Run data on your behalf.
Yes. Add https://mcp.corsair.dev/mcp as a custom connector or MCP server in Claude, ChatGPT, Cursor, VS Code, Claude Code, Codex or any client that supports remote MCP servers with OAuth sign-in, then sign in to Corsair. On ChatGPT personal plans, custom servers currently get read tools only.
Yes. Put Cloudflare Browser Run on a link in Strict mode and every write waits for your approval, while destructive actions are refused. The default Cautious mode asks only before the 5 destructive Cloudflare Browser Run operations. You can change a link's mode at hub.corsair.dev/me.