# Danny-Dasilva/CycleTLS

Spoof TLS/JA3 fingerprints in GO and Javascript

Repository: https://github.com/Danny-Dasilva/CycleTLS
Canonical: https://ross.abutalabs.com/products/cycletls
Language: Go
License: GPL-3.0
License Family: copyleft
Topics: ja3, tls, golang, fingerprint, fingerprinting, bypass, go, http, http2, https, javascript, js, typescript
Last push: 2026-07-07T18:54:33+00:00

## Health v2 (maintenance only)
Score: 73/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 91, release rhythm 35, longevity 100
- inputs: {"age_days": 2003, "days_push": 57, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1518, forks 218 (observed 2026-08-28T04:04:57.425676+00:00)

## What it is
CycleTLS is a Go library with a JavaScript/TypeScript wrapper that lets clients spoof TLS/JA3 (and JA4) fingerprints when making HTTP requests, helping bypass TLS-fingerprint-based bot detection. It supports custom header ordering, proxies, HTTP/2 and HTTP/3 (QUIC), WebSockets, and SSE.

## Use cases
- scrape sites that block requests by TLS fingerprint
- spoof JA3 fingerprint in Go
- make HTTP requests with a browser-like TLS handshake from Node.js
- bypass Cloudflare JA3 fingerprinting
- send requests through a proxy with custom TLS fingerprint
- test how a server responds to different client fingerprints

## When to choose
- you need to emulate browser TLS fingerprints (JA3/JA4) in Go or JavaScript
- you're scraping or testing endpoints that fingerprint TLS clients
- you need custom header ordering, HTTP/2/3, or proxy support alongside fingerprint spoofing

## When to avoid
- you just need a standard HTTP client without fingerprint spoofing
- you need a general-purpose scraping framework with parsing and rendering
- your project disallows GPL-3.0 licensed dependencies

## Facets
- artifact type: library
- maturity: active
- function: http-client, security, networking
- domain: security, web-development, crawlers, developer-tools
- platform: go, cross-platform
- tags: ja3-fingerprint, tls-spoofing, anti-bot-bypass, http2, http3, quic, websocket, proxy-support, typescript, web-scraping, nodejs

## Member repositories
- Danny-Dasilva/CycleTLS (main) score 73

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:57.425676+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:31:59.453418+00:00, confidence not recorded.
  - readme: https://github.com/Danny-Dasilva/CycleTLS (fetched 2026-08-28T04:04:57.425676+00:00, sha 8b39ec92df76)
- Data as of 2026-08-30T08:39:29.467469+00:00.