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heron

heron

New Developer Tools Open Source

Heron is a passive analyzer that watches LLM traffic on the wire and reconstructs what your agents are doing — tool calls, multi-step plans, where time goes. No SDK, no proxy, off the request path.

Free
Pricing Model
Heron is a passive analyzer that watches LLM traffic on the wire and reconstructs what your agents are doing — tool calls, multi-step plans, where time goes. No SDK, no proxy, off the request path.

heron at a Glance

Pricing
Free
How you use it
CLI with a local web console
Who it's for
Operations and development teams observing agents and LLM traffic
Works with
Claude Code OpenAI Codex Hermes OpenClaw OpenAI Anthropic Azure OpenAI Gemini vLLM Ollama

heron Key Features

  • Agent turn reconstruction
  • LLM traffic analysis
  • Latency and token metrics
  • Session observability
  • Trajectory export

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