Kernel

You sign up without a credit card and get an API key. From the TypeScript, Python or Go SDK, the official CLI, the HTTP API (with an OpenAPI 3.1 spec) or the hosted MCP server, you create a browser session and connect your automation to it, whether that is a Playwright script, a WebDriver client or an agent using a computer-use model. For work that needs to stay logged in, you attach a profile so cookies and state persist across sessions, or use managed auth so a user approves the login once. Latency-sensitive jobs can draw from a pool of warm browsers, while bursty work spins sessions up on demand. While the agent runs, you can open a live view of the browser, and afterwards replay the session or pull a recording to debug what went wrong. Usage is metered per GB-second while the browser is working, so an idle session costs nothing.

• •Sandboxed Chromium on demand - Isolated cloud browsers your agent controls through an API or SDK, which Kernel says spin up in under 30 ms, with browser pools for latency-sensitive work and on-demand sessions for bursts.
• •Stealth mode and proxies - Captcha solving and proxy management so agents get blocked less often; higher plans add unlimited proxy usage and bring-your-own proxies.
• •Profiles and managed auth - Browser state persists between sessions, and managed auth lets an agent use a logged-in profile the user approved without ever seeing the credentials. Vaults store secrets for payments and logins.
• •Live view, replays and telemetry - Watch a session as it runs, keep replays (1 day on Free, up to 30 days on Start-up), record sessions as MP4, and use the browser telemetry API so an agent can debug its own errors.
• •Agentic payments - Agents can check out on websites through wallet integrations such as Link by Stripe.
• •GPU and regional browsers - On the Start-up plan, GPU acceleration for canvas-heavy and memory-intensive sites, and browsers run in the nearest region to cut latency per action.

Perfect for developers building web agents that have to act on real websites, teams running QA agents that click through their own product, and companies automating work on sites that offer no API, such as insurance filings, e-commerce operations or go-to-market research. The free plan (5 concurrent browsers, $5 of usage credits a month, no card) is enough to prototype an agent end to end, and the open-source images let you see exactly what runs. Teams that need hundreds of concurrent browsers, SSO, SOC2 and HIPAA compliance, a 99.9% SLA or zero data retention move to the Start-up or Enterprise plans. It is a weaker fit if the sites you need already have good APIs, or if you only run an occasional local Playwright script, where a browser on your own machine costs nothing.