CompatLab

npm compatibility checker for Node.js, Bun and Deno

An open-source tool that records how npm packages load with import and require across pinned Node.js, Bun and Deno runtime versions on Linux amd64/glibc. Provides a web directory of tested package versions, per-report loading outcomes by runtime and consumer mode, a CLI for running the same checks on your own host, a read API, and a remote MCP server with read-only tools for checking packages and reading reports.

Category: Developer productivity
Pricing: free
Free tier: yes
API: yes
MCP server: yes
SDK: no
Open source: yes

#npm #compatibility #nodejs #bun #deno #mcp #cli #open-source

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Listed 2026-10-25 · last verified 2026-10-25 · extracted by @cf/zai-org/glm-5.3-flash · confidence 0.9

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API

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