Observed arrival · 2026-09-05
mcpobs: observability for MCP servers
A tracing and monitoring layer for Model Context Protocol servers, with classified failures, live progress, and downstream calls shown in context.
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Field notes
The instrumentation model attaches to an MCP server with `instrument(mcp)` and is described as working over both stdio and HTTP. The page distinguishes five operational failure classes and shows progress reporting for a reindex operation at 1,842 of 2,875 documents. Optional context includes database, HTTP, LLM, and messaging calls, with tool arguments and results kept off by default.
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○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
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