SDKs

Small libraries for Node.js, Python, Java, C# and Go that wrap the cdpfleet API: launch a browser (retrying when the fleet is busy, as the API asks), connect your own Playwright to it, and close it — plus keep_alive reconnects, live links, proxy swaps, recordings and your usage. You don't need them: every example on this site also works with plain Playwright and one HTTP call. They just remove the boilerplate.

// npm install cdpfleet [email protected]
// Browsers run on cdpfleet, so no `npx playwright install` is needed.
import { chromium } from 'playwright';
import { Cdpfleet } from 'cdpfleet';

const fleet = new Cdpfleet(); // reads CDPFLEET_API_KEY
const options = {
  proxy: 'http://user:[email protected]:8080',
  headless: 'new',
};

const session = await fleet.launch('chromium', options);
const browser = await session.connect(chromium);
const page = await browser.newPage();
await page.goto('https://example.com');
console.log(await page.title());
await session.close(); // ends the session and stops billing

# pip install cdpfleet playwright==1.60.0
# Browsers run on cdpfleet, so no `playwright install` is needed.
from cdpfleet import Cdpfleet
from playwright.sync_api import sync_playwright

fleet = Cdpfleet()  # reads CDPFLEET_API_KEY
options = {
    "proxy": "http://user:[email protected]:8080",
    "headless": "new",
}

with sync_playwright() as p, fleet.launch("chromium", options) as session:
    browser = session.connect(p.chromium)
    page = browser.new_page()
    page.goto("https://example.com")
    print(page.title())
# leaving the block closes the session and stops billing

// The cdpfleet SDK for Java (Maven Central) isn't published yet, so this is the plain
// Playwright version — it works today. The SDK will remove the launch boilerplate.
// Maven: com.microsoft.playwright:playwright:1.60.0  and  com.google.code.gson:gson:2.11.0
// Run with PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD=1: browsers run on cdpfleet.
import com.google.gson.JsonParser;
import com.microsoft.playwright.*;
import java.net.URI;
import java.net.http.*;
import java.util.Map;

public class Example {
  public static void main(String[] args) throws Exception {
    String key = System.getenv("CDPFLEET_API_KEY");

    // 1. Launch the browser
    String body = """
        {
          "proxy": "http://user:[email protected]:8080",
          "headless": "new"
        }
        """;
    HttpResponse<String> res = HttpClient.newHttpClient().send(
        HttpRequest.newBuilder(URI.create("https://starter.cdpfleet.com/chromium/session"))
            .header("x-api-key", key)
            .header("content-type", "application/json")
            .POST(HttpRequest.BodyPublishers.ofString(body))
            .build(),
        HttpResponse.BodyHandlers.ofString());
    if (res.statusCode() != 200) {
      throw new RuntimeException("launch failed: " + res.statusCode() + " " + res.body());
    }
    String wsUrl = JsonParser.parseString(res.body()).getAsJsonObject().get("wsUrl").getAsString();

    // 2. Connect and drive it
    try (Playwright playwright = Playwright.create()) {
      Browser browser = playwright.chromium().connect(wsUrl,
          new BrowserType.ConnectOptions().setHeaders(Map.of("x-api-key", key)));
      Page page = browser.newPage();
      page.navigate("https://example.com");
      System.out.println(page.title());
      browser.close(); // ends the session and stops billing
    }
  }
}

// The cdpfleet SDK for C# (NuGet) isn't published yet, so this is the plain
// Playwright version — it works today. The SDK will remove the launch boilerplate.
// dotnet add package Microsoft.Playwright --version 1.60.0
// Browsers run on cdpfleet, so no `playwright install` is needed.
using System.Net.Http.Json;
using System.Text;
using System.Text.Json;
using Microsoft.Playwright;

var key = Environment.GetEnvironmentVariable("CDPFLEET_API_KEY")!;

// 1. Launch the browser
using var http = new HttpClient();
http.DefaultRequestHeaders.Add("x-api-key", key);
var body = """
    {
      "proxy": "http://user:[email protected]:8080",
      "headless": "new"
    }
    """;
var res = await http.PostAsync("https://starter.cdpfleet.com/chromium/session",
    new StringContent(body, Encoding.UTF8, "application/json"));
if (!res.IsSuccessStatusCode)
    throw new Exception($"launch failed: {(int)res.StatusCode} {await res.Content.ReadAsStringAsync()}");
var wsUrl = (await res.Content.ReadFromJsonAsync<JsonElement>()).GetProperty("wsUrl").GetString()!;

// 2. Connect and drive it
using var playwright = await Playwright.CreateAsync();
var browser = await playwright.Chromium.ConnectAsync(wsUrl, new BrowserTypeConnectOptions
{
    Headers = new Dictionary<string, string> { ["x-api-key"] = key },
});
var page = await browser.NewPageAsync();
await page.GotoAsync("https://example.com");
Console.WriteLine(await page.TitleAsync());
await browser.CloseAsync(); // ends the session and stops billing

// go get github.com/cdpfleet/cdpfleet/sdk/go github.com/playwright-community/[email protected]
//
// One-time driver setup (needs Node.js 18+): playwright-go can no longer download the
// 1.60.0 driver itself, so build it from npm and point PLAYWRIGHT_DRIVER_PATH at it:
//   mkdir -p ~/.cache/pw-driver-1.60.0 && cd ~/.cache/pw-driver-1.60.0 &&
//     curl -sL https://registry.npmjs.org/playwright-core/-/playwright-core-1.60.0.tgz | tar xz &&
//     ln -sf "$(command -v node)" node
//   export PLAYWRIGHT_DRIVER_PATH=~/.cache/pw-driver-1.60.0
package main

import (
	"encoding/json"
	"fmt"
	"log"

	cdpfleet "github.com/cdpfleet/cdpfleet/sdk/go"
	"github.com/playwright-community/playwright-go"
)

func main() {
	fleet, err := cdpfleet.New() // reads CDPFLEET_API_KEY
	if err != nil {
		log.Fatal(err)
	}
	var options cdpfleet.Options
	if err := json.Unmarshal([]byte(`{
	  "proxy": "http://user:[email protected]:8080",
	  "headless": "new"
	}`), &options); err != nil {
		log.Fatal(err)
	}

	pw, err := playwright.Run(&playwright.RunOptions{SkipInstallBrowsers: true})
	if err != nil {
		log.Fatal(err)
	}
	defer pw.Stop()

	session, err := fleet.Launch("chromium", options)
	if err != nil {
		log.Fatal(err)
	}
	defer session.Close() // ends the session and stops billing

	browser, err := session.Connect(pw.Chromium)
	if err != nil {
		log.Fatal(err)
	}
	page, err := browser.NewPage()
	if err != nil {
		log.Fatal(err)
	}
	if _, err := page.Goto("https://example.com"); err != nil {
		log.Fatal(err)
	}
	title, _ := page.Title()
	fmt.Println(title)
}

The code builder writes this for any browser and options — switch it between SDK and Plain.

Install

Node.js, Python and Go are published (0.1.1). The C# and Java packages are on their way to NuGet and Maven Central — until then they build from their source on GitHub.

Language	Package	Playwright (yours)
Node.js	`npm install cdpfleet` (ESM, TypeScript types)	`[email protected]`
Python	`pip install cdpfleet` (sync and async)	`playwright==1.60.0`
Java	Maven `com.cdpfleet:cdpfleet:0.1.0` (coming soon)	`com.microsoft.playwright:playwright:1.60.0`
C#	`dotnet add package Cdpfleet` (coming soon)	`Microsoft.Playwright 1.60.0`
Go	`go get github.com/cdpfleet/cdpfleet/sdk/go`	`playwright-go v0.6000.0`

The SDKs never bundle Playwright: you pass your own browser type (chromium, firefox, webkit), so you choose the client version — 1.60 for every browser, 1.52 for Rebrowser. Sources, specification and examples: github.com/cdpfleet/cdpfleet/sdk.

What they do for you

Launch with the right retries: 503 (fleet busy) and 429 (rate or thread limit) are retried, honouring Retry-After, for up to two minutes; quota errors and bad requests fail at once with the API's error code.
Connect, or connect over CDP: session.connect(chromium) or session.connectOverCDP(chromium) (launch with cdp: true) — the key goes in the header.
One-step connect URL: fleet.connectUrl('chrome', { headless: 'new' }) (Python connect_url, Go ConnectURL) returns a launch-on-connect URL — chromium.connect(url, { headers: fleet.headers() }) launches and connects in one step, and the URL drops straight into Playwright Test's wsEndpoint. cdp: true gives a /cdp URL for connectOverCDP or Puppeteer. Node.js, Python and Go for now.
keep_alive: call connect again after a disconnect to re-attach (the SDK waits out the few seconds the router needs); close() ends a keep_alive session, which browser.close() alone doesn't.
Live view and proxy swap: session.liveLink('control') returns a live link; session.swapProxy(proxy, rules) moves a proxy_updatable session to another proxy.
Account API: usage, live threads, session history, recordings (list, link, delete) and your residential balance.

Names in each language

	Node.js	Python	Java	C#	Go
Client	`new Cdpfleet()`	`Cdpfleet()` / `AsyncCdpfleet()`	`new Cdpfleet()`	`new CdpfleetClient()`	`cdpfleet.New()`
Launch	`await fleet.launch(name, options)`	`fleet.launch(name, options)`	`fleet.launch(name, Map)`	`await fleet.LaunchAsync(name, options)`	`fleet.Launch(name, cdpfleet.Options{…})`
Connect URL	`fleet.connectUrl(name, options)`	`fleet.connect_url(name, options)`	—	—	`fleet.ConnectURL(name, cdpfleet.Options{…})`
Done	`await session.close()`	`with … as session:`	try-with-resources	`await using var session`	`defer session.Close()`

The API key comes from CDPFLEET_API_KEY unless you pass one. For AI agents, see the MCP server.