NullOrigin is an open-source local proxy that intercepts and neutralizes AI watermarks and provenance metadata in transit. Simply point your OpenAI, Anthropic, or Gemini SDKs to localhost. NullOrigin pipes streaming text through a local SLM (via Ollama) to mathematically destroy statistical watermarks like KGW on the fly. It also strips C2PA/EXIF metadata from images and scans generated code for Trojan Source vulnerabilities. Built for researchers and privacy-focused developers.