The answer

Gradus Notation

Top verified match: it matches your intent, it is the official vendor server, corroborated across multiple registries.

fresh · published 38d ago · verified 2026-08-08tested · static-verifiedsigned passport ✓score 53/100

claude mcp add Gradus Notation -- npx -y @gradusmusic/notation-mcp

Runners-up

Mission — Trust Graduation Gate57/100 · higher verification score, weaker intent match
@gradio/client64/100 · higher verification score, weaker intent match
ai.upgradeagent/upgrade-agent47/100 · weaker match