Claude Code ←→ localhost:16889 ←→ api.deepseek.com/anthropic

40% cheaper sub-agents. Zero quality loss on primary sessions. Fewer failures than calling DeepSeek directly.

How? Read the thinking field from Claude Code. Route sub-agents (disabled) to Flash with budget_tokens=2048. Passthrough primary sessions (enabled/adaptive) untouched.

Quality is not compromised — it's improved. ds-cc-proxy fixes 12 compatibility bugs in the raw DeepSeek Anthropic API: thinking mode isolation, SSE parsing edge cases, connection pool exhaustion, header leakage, crash-on-invalid-env, and more.

Quick Start

pip install ds-cc-proxy      # or pipx / uv tool install
ds-cc-proxy                   # start
ds-cc-proxy --stop            # stop

Add to ~/.claude/settings.json under env:

"ANTHROPIC_BASE_URL": "http://localhost:16889"

curl http://localhost:16889/health
# {"status":"ok","version":"0.1.22","upstream":"https://api.deepseek.com/anthropic"}

Environment Variables

Comparison

Pick ds-cc-proxy if DeepSeek is your daily driver and you want stability, cost savings, and zero config.

Pick LiteLLM / CCR / OpenRouter if you need multi-provider switching, enterprise RBAC, or don't use DeepSeek thinking modes.

Coexistence with Local Proxies

ds-cc-proxy (127.0.0.1:16889) handles only Claude Code traffic. Clash Verge, V2Ray, and other system-level proxies work at different network layers — run both simultaneously, no configuration needed.

Project Origin

Forked from HosheaLi/P14_dsv4ToCC v1.8.0. Earlier versions were released as dsv4-cc-proxy. v0.1.22 was renamed to ds-cc-proxy. Upgrading:

pip uninstall dsv4-cc-proxy && pip install ds-cc-proxy