Express vs SDK
SDK scores 6 points higher — a narrow lead. Read the evidence rows below before treating it as decisive. Both are measured the same way, on the same day, from public evidence only — so this is a comparison of two measurements rather than two marketing pages. How we measure ›
| Express | SDK | what it means | |
|---|---|---|---|
| tashan score | 80 | 86 | upkeep + freshness, gated by adoption |
| Adoption evidence | 26k/wk | 53.3m/wk | the raw public signal the score came from |
| Last release | active | active | npm publish or repo push |
| Upkeep | 91 | 99 | cadence, maintainers, status |
| Expertise grade | not graded | not graded | an LLM read of its own documentation against a fixed rubric |
| Security audit | no known advisories, no build provenance | no known advisories, no build provenance | a summary — the full audit, free, is on each dossier |
| Licence | — | — | |
| Maintainers | more than one | more than one | bus-factor risk |
Install either
Express
claude mcp add modelcontextprotocol-express -- npx -y @modelcontextprotocol/expressSDK
claude mcp add modelcontextprotocol-sdk -- npx -y @modelcontextprotocol/sdkNeither score is a security verdict — "well maintained" and "nothing known is wrong" are different claims, which is why the audit is a separate row and never folded into the number. The full audit for each — the advisory ids, the version that fixes them and anything that runs at install time — is free on its own page: Express · SDK.