AI Plugin IndexMCP Extensions vs MCP Registry Server
MCP Extensions and MCP Registry Server are both ai and llm tools MCP servers. MCP Registry Server scores higher (94 vs 91 out of 100). MCP Registry Server has more GitHub stars (7.4k), and MCP Registry Server was updated more recently (8 days ago). The table compares them side by side.
| MCP Extensions | MCP Registry Server | |
|---|---|---|
| Score | 91 / 100 | 94 / 100 |
| What it does | OpenAI extensions for MCP servers and apps. | Publish and discover MCP servers via the official MCP Registry. Powered by HAPI MCP server. |
| Publisher | Verified: npm:@openai | Verified: mcp.com.ai |
| Grades | Maintenance A, Licence A, Quality B | Maintenance A, Licence F, Quality A |
| npm downloads a week | 64,945 | Not on npm |
| Runs | Local | Remote |
| Works with | Claude Code, Claude Desktop, Cursor, Codex, Gemini CLI, VS Code, Windsurf | Claude Code, Claude Desktop, Cursor, Codex, Gemini CLI, VS Code, Windsurf, ChatGPT |
| GitHub stars | 1,090 | 7,381 |
| Last commit | 10 Oct 2026 | 14 Oct 2026 |
| Licence | Apache-2.0 | NOASSERTION |
| Listed since | 20 Oct 2026 | 19 Oct 2026 |
| Install MCP Extensions | Install MCP Registry Server |
Questions
Is MCP Extensions or MCP Registry Server more popular?
MCP Registry Server has more GitHub stars: 7,381.
Can I use MCP Extensions and MCP Registry Server together?
Yes. AI assistants can load several MCP servers at once. Install both and the assistant picks the right one for each task.