The answer
Countersign
Top verified match: it matches your intent, corroborated across multiple registries.
fresh · published 47d ago · verified 2026-08-08tested · static-verifiedsigned passport ✓score 41/100
claude mcp add Countersign -- npx -y @countersign/mcp
Runners-up
- Countersignnot yet verified8/100 · weaker match