Every server in the official MCP Registry. Ranked by whether they actually work: we connect to each one and publish what happens.
19,484 servers
USGS ScienceBase catalog MCP.
Resident Advisor (ra.co) MCP.
Retractions / research-integrity MCP.
Public Suffix List MCP.
Go modules MCP — wraps proxy.golang.org
Outlook Calendar MCP Pack
Outlook Mail (Microsoft 365) MCP Pack
OpenEI Utility Rate Database (URDB) MCP
Open Collective public MCP.