Show HN: Spanly - See what AI agents do inside your MCP server

Category: observability

Tags: observability, mcp, ai-agents, sidecar-proxy, apm

Score: 6.0/10 (Innovation: 6, Technical: 6, Documentation: 4, Utility: 6)

Spanly is an observability platform for MCP servers, acting as a sidecar proxy that captures protocol-level telemetry without code changes. It addresses the gap in generic APM by providing detailed agent interactions, client identification, and product-level analytics alongside engineering traces.

Target audience: backend developers, devops, platform teams, AI engineers

Repository: https://spanly.com/

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