🧊 Open source LLM observability platform. One line of code to monitor, evaluate, and experiment. YC W23 🍓
Helicone is an open-source platform for monitoring and routing requests to large language models. AI engineers use it to inspect agent and application traces, track cost and latency, evaluate quality, manage prompts, and access multiple models through an API gateway. Catalogue add-ons support observability and LLM workflow tasks.
Latest release v2025.08.21-1 · 21 Aug 2025
3 files for Claude Code, Cursor, Codex and OpenCode: bifrostpublicstaticblogn8n-helicone-node, helicone AGENTS.md, helicone CLAUDE.md — 5,269 tokens loaded in every session.
AGENTS.md A 791 tok CLAUDE.md A 4,478 tok .cursor/commands/bifrostpublicstaticblogn8n-helicone-node.md — These files are Helicone/helicone's own configuration — they tell Claude Code, Cursor, Codex and OpenCode how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.