heron

Agent and LLM API performance monitoring via network packet probe. Measures performance of OpenClaw, Claude, Codex, DeepAgents and more — deployed on the provider side, no SDK changes required. Maintained by Netis on GitHub, where it has earned 80 stars from the community.

It's actively developed around libpcap, llm-monitoring, llm-observability, and is a solid reference for anyone building with these tools.