cyfdecyf/cow

Health v2 · maintenance only

Adoption not part of the score

8413 stars · 1596 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

COW is an HTTP proxy server written in Go that automatically detects blocked websites and routes only those through parent (secondary) proxies such as SOCKS5, HTTP, or shadowsocks. It generates PAC files for direct connections and supports multiple parent proxies with simple load balancing.

Use cases

• bypass website blocking with automatic detection
• route only blocked sites through a secondary proxy
• set up an HTTP proxy for mobile devices
• generate a PAC file that bypasses the proxy for accessible sites
• chain shadowsocks or SOCKS5 proxies with load balancing
• speed up browsing by direct-connecting unblocked sites

When to choose

• you need a lightweight HTTP proxy that automatically learns which sites are blocked
• you want to combine multiple parent proxies (SOCKS5, HTTP, shadowsocks) with failover
• you want PAC-based direct access for unblocked sites to keep speeds fast

When to avoid

• you need actively maintained software with recent updates and support
• you need a full VPN or encrypted tunnel for all traffic rather than selective proxying
• you need modern protocols like VLESS, Trojan, or WireGuard

Facets

application · maturity maintenance

proxy http-server networking security privacy censorship-circumvention networking web-development windows go cli http-proxy socks5 shadowsocks pac censorship-circumvention parent-proxy auto-detection linux macos

Member repositories

For agents

markdown · JSON · MCP: product_card(name="cyfdecyf/cow")