⚡ Thunder

The human engine for AI agents.

Give any software a human body: a real browser with a real fingerprint, a mouse that trembles like a hand, keystrokes at human cadence, and a TLS handshake indistinguishable from Chrome's.

A bot that walks like a person.

Install · Watch the proof · MCP for any software

Why Thunder exists

Every anti-bot system on Earth looks for the same three tells:

1. Protocol tells — a Python scraper's TLS/HTTP-2 handshake screams "bot" before a byte of JS runs.
2. Fingerprint tells — navigator.webdriver, headless quirks, software-rendered WebGL, empty plugin arrays.
3. Behavioral tells — perfectly straight mouse paths, instant typing, zero reading pauses.

Thunder is a body for your AI that has none of them. Not patched over — absent, the way a real human's browser is.

pip install thunder-agent

import thunder

body = thunder.Body(profile="ada")          # a persistent human named Ada
await body.warmup()                         # age the session like a returning user
await body.go("https://protected-site.com")
await body.type("#email", "ada@example.com")   # typed like a person. Typos included.
await body.look("proof.png")                    # screenshot evidence
await body.rest()                              # close, keep the identity

Ada comes back tomorrow with the same cookies, same screen, same GPU string, same timezone. The site sees a returning regular.

📦 Install in 30 seconds

pip install thunder-agent

Works on Linux, macOS, Windows. Real-Chrome engine auto-detected; falls back to bundled Chromium.

thunder demo        # watch it browse like a human, right now
thunder ghost https://nowsecure.nl    # TLS-level fetch that passes the gate

⚡ The five layers

Verified live: bot.sannysoft.com under Thunder — WebDriver missing (passed) · WebDriver Advanced passed · Chrome present (passed) · PluginArray passed — 4 passed, 0 failed with headed real Chrome. Ghost pulls a 200 from a Cloudflare gate that 403s plain Python, same minute.

🔌 MCP: give ANY software a human body

Zero-install, zero-account — paste this URL into Claude (Settings → Connectors → Add custom connector, or claude.ai/mcp):

https://thunder-mcp.onrender.com/mcp

That's it. No signup, no keys. Thunder-hosted, always on. You get thunder_search, thunder_read, thunder_ghost, thunder_feel, thunder_solve, thunder_open — search, clean extraction and bot-gate-safe fetches through Chrome's exact TLS handshake, from inside Claude.

Want the full human body (stealth Chrome, mouse tremor, human typing) under MCP? Run it locally — 15 tools, full parity with the hosted endpoint plus the browser-only ones:

Thunder ships an MCP server (15 tools). Paste one config and Claude, Cursor, Cline, Windsurf — anything that speaks MCP — browses as a human:

{ "mcpServers": { "thunder": {
    "command": "pipx", "args": ["run", "thunder-agent", "thunder-mcp"] } } }

{ "mcpServers": { "thunder": {
    "command": "uvx", "args": ["--from", "thunder-agent", "thunder-mcp"] } } }

Local tools (full set): `thunder_open`, `thunder_read`, `thunder_click`, `thunder_type`, `thunder_scroll`, `thunder_look`, `thunder_ghost`, `thunder_search`, `thunder_feel`, `thunder_captcha`, `thunder_challenge`, `thunder_human_read`, `thunder_identity`, `thunder_think`, `thunder_rest`. Hosted endpoint tools: `thunder_search`, `thunder_read`, `thunder_ghost`, `thunder_feel`, `thunder_solve`, `thunder_open` (guide for running the full body locally). Same core, same code — online and offline behave identically.

Tools: thunder_open · thunder_read · thunder_search · thunder_click · thunder_type · thunder_scroll · thunder_ghost · thunder_solve · thunder_feel · thunder_close — each one moves like a person, never like a script.

🚫 The blocker table — what used to stop bots, and Thunder's answer

🔒 CAPTCHAs without a subscription

from thunder.captcha import soft_solve, ocr_solve
result = await soft_solve(body.page)     # human-hand click, no keys needed

Non-interactive challenges often pass on a warmed-up session. For Turnstile/reCAPTCHA Enterprise, wire your own CapSolver or 2Captcha key — Thunder senses the challenge type and routes it.

v0.5 — ChallengeResolver, Thunder's own bypass system (no external deps):

from thunder.captcha import ChallengeResolver
verdict = await ChallengeResolver().resolve(body.page, body=body)
# {'solved': True, 'kind': 'turnstile', 'how': 'human-timed checkbox click'}

Detects the challenge type — Turnstile, reCAPTCHA v2, hCaptcha, Amazon's text captcha, Cloudflare interstitials — and runs the built-in counter: hand-timed checkbox clicks, patience for interstitials, local OCR for Amazon (retrying like a person squinting). No paid keys, no subscriptions.

🫆 Wear YOUR OWN fingerprint

The headline feature of v0.5. Open https://browserleaks.com in your normal browser, copy your values, and Thunder wears your machine's ghost — same UA, GPU strings, screen, cores, RAM, timezone, languages:

from thunder.fingerprint import Skin
from thunder.body import Body

me = Skin.imitate({
    "user agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) ...",
    "gpu renderer": "ANGLE (Apple, ANGLE Metal Renderer: Apple M2, ...)",
    "timezone": "Europe/London", "screen": "2560x1440",
})
body = Body(skin=me)            # your machine's ghost

Or from the terminal:

thunder identity --out my.json        # export the live fingerprint
thunder identity --imitate my.json    # wear it and verify live

Partial data is fine — anything missing stays Thunder-consistent. An imitated skin is mutually consistent: your Mac UA will never claim a Windows GPU.

📖 Reads like a human too

await body.read_like_human(seconds=15)   # burst-scroll, reading pauses,
                                         # idle drift, re-reads

Behavioral ML scores dwell patterns. Thunder gives pages a genuine reading signature — pauses at paragraph speed, hands that drift while "reading", occasional scroll-backs.

🧠 Pair with any mind

Thunder is the body; bring any brain. Works with stewmind, Ollama, LM Studio, vLLM, OpenAI-compatible APIs, or fully offline transformers.

from thunder.mind import Mind
mind = Mind(provider="ollama", model="llama3")
plan = await mind.think("find the pricing page and extract the tiers", body)

🧪 Tested, not promised

git clone https://github.com/emmanuelerogian723-alt/thunder
cd thunder && pip install -e ".[dev]" && pytest

Stealth regression suite: webdriver erased + scan-invisible · genuine PluginArray · headless pack · WebGL skin-consistency · proxy rotation. Each one fails loudly if a future commit breaks the human illusion.

⚖️ The honest limits (why people trust Thunder)

• No tool on Earth is "undetectable." Anyone selling that is lying to you.
• Cloud IPs still look like clouds — pair Thunder with a residential proxy for the hardest targets.
• Google-scale behavioral ML scores the whole session. Thunder's warmup + hand give you a real chance; it's not a magic key.
• Use Thunder only where you're authorized. Your accounts, your tests, your sites. That's the license, and it's the line.

MIT licensed. Built in the open — every claim on this page has a script in tests/ or a screenshot in proofs/.