Pydantic Logfire

Pydantic Logfire is an observability platform built on OpenTelemetry that traces LLM calls, AI agents, APIs, databases, and vector searches in a unified view. It provides AI-specific features such as token and cost tracking, conversation inspection, and tool call visibility alongside full-stack traces, metrics, and logs. SDKs are available for Python, JavaScript/TypeScript, Rust, and other OTel-compatible languages.