Simple, open-source LLM tracing for AI agents. Track prompts, completions, latency, token usage, and cost.

FAQ
Breadcrumb is an LLM tracing tool for AI apps and agents, tracking prompts, completions, latency, token usage, and cost for every request. It is open source, self-hostable, and easy to integrate in TypeScript workflows. Core capabilities include: End-to-end LLM call tracing, Prompt and completion replay, Token and cost analytics.
Common scenarios include: AI agent debugging and troubleshooting, Model usage cost governance, Prompt effectiveness optimization.