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Compare servers	Spanlens
Purpose	Open source LLM observability and monitoring. Drop-in proxy for OpenAI, Anthropic, and Gemini with request logging, cost tracking, and agent tracing. Self-host with one Docker command. MIT.
Authentication (maintainer declared)	Unknown
Public launch command	Project-specific setup
Configuration source	Public install instructions
Observed tools	Unknown
Last complete tool check	Unknown
License	MIT
	Open setup

A complete tool check lists tools; it does not exercise them or certify security.