Spider Browser — cloud + desktop
The browser built for AI agents.
Not a wrapper around someone else’s browser — a whole engine, written in Rust and pre-warmed in the cloud. Your agent gets a live page in milliseconds and four verbs that speak plain English.
Free credits on sign-up · No credit card
- ~4 ms
- command latency
- 0 ms
- cold start
- 100
- concurrent sessions
- $1/GB+ $0.001/min
- pay per use
Four verbs. The whole web.
The prologue never changes: init() attaches a pre-warmed session in milliseconds. From there, your agent speaks English.
import { SpiderBrowser } from "spider-browser"
const spider = new SpiderBrowser({ apiKey: process.env.SPIDER_API_KEY })
await spider.init() // pre-warmed — live in millisecondsawait spider.page.goto("https://github.com/trending")
await spider.page.act("Switch the language filter to Rust")
await spider.page.act("Open the top repository")
// no selectors, no XPath — the browser finds the elementconst actions = await spider.page.observe( "What can I do on this page?" ) // → candidate actions, each mapped to a live element
const repos = await spider.page.extract( "Every repository name, star count, and language" ) // → structured JSON, straight off the rendered page
const result = await spider.page.agent( "Find the three fastest-growing Rust repos this week and return them as JSON" ) // → navigates, clicks, fills, extracts — autonomously
Wrappers adapt. This was born for it.
Built for programs, not people.
Every other browser was designed for a human at a screen; agents rent it awkwardly. Spider Browser was written from scratch in Rust for software that browses — no borrowed overhead, no Node.js bottleneck.
Everything on by default.
Stealth, proxy rotation, CAPTCHA solving, smart retry. Zero configuration — your agent never sees the fight, it just gets the page.
Warm before you ask.
A fleet keeps sessions pre-warmed. init() attaches in milliseconds, up to 100 run at once, and you pay only for what actually runs.
One API. Every runtime.
- TypeScript
$ npm install spider-browsernpm ↗ - Python
$ pip install spider-browserPyPI ↗ - Rust
$ cargo add spider-browsercrates.io ↗ - MCP
plug into Claude, Cursor, or any MCP clientMCP server - Desktop macOS Windows Linux same engine
Metered, not subscribed.
- a five-minute agent run ≈ $0.005 compute
- typical bandwidth per run a few MB — fractions of a cent
- monthly minimum · contracts $0 · none
Stealth, proxy rotation, and CAPTCHA solving are included in the price — not add-ons.
What is Spider Browser?
A cloud browser built from the ground up in Rust for AI agents and automation — not a wrapper around someone else’s browser. Sessions are pre-warmed, so they start in milliseconds, and stealth, proxy rotation, CAPTCHA solving, and smart retry are on by default. Use it for agent workflows, scraping, automation, and extraction.
Can AI agents use it?
Yes — it’s what the browser is built for. The agent() API lets any LLM browse, click, fill forms, and complete multi-step tasks autonomously. act(), observe(), and extract() give fine-grained control with plain-English commands.
How is it different from Puppeteer or Playwright?
Puppeteer and Playwright automate a stock browser — never designed for scraping or agents. Spider Browser is a purpose-built Rust engine: no browser overhead, no Node.js bottleneck, no DIY stealth. You write the logic, Spider handles the rest.
What can I use it for?
Anything that needs a real browser: AI-agent browsing, scraping at scale, price monitoring, lead generation, competitive intelligence, automated testing, RAG ingestion. JavaScript and login flows are first-class.
Which languages are supported?
Official SDKs for TypeScript (npm install spider-browser), Python (pip install spider-browser), and Rust (cargo add spider-browser). All three share the same API surface — init, goto, act, observe, extract, agent.
Does it handle anti-bot protection?
Yes. Stealth, proxy rotation, and CAPTCHA solving are built in and handled automatically. No configuration required.
What does it cost?
$1 per GB of bandwidth and $0.001 per minute of compute. No monthly minimum, no contracts. Free credits on sign-up. Stealth, proxies, and CAPTCHA solving are included in the price.
How many concurrent sessions can I run?
Up to 100 concurrent sessions with zero cold start. Each runs on a pre-warmed instance, so combined with smart retry and automatic recovery it scales to high-volume workloads.
Give your agent a real browser.
Free credits on sign-up. No credit card, no cold starts.