AI Plugin IndexWhat Devtools MCP vs Harness
What Devtools MCP and Harness are both ai and llm tools MCP servers. Harness scores higher (95 vs 77 out of 100). Harness has more GitHub stars (1.3k), and What Devtools MCP was updated more recently (2 days ago). The table compares them side by side.
| What Devtools MCP | Harness | |
|---|---|---|
| Score | 77 / 100 | 95 / 100 |
| What it does | MCP server bridging AI agents to live What Framework app state via WebSocket | Start Claude Code and Codex agents the person can watch, wait for them and read their answers. |
| Publisher | Verified: npm:what-devtools-mcp | Verified: harness.autonomous.ai |
| Grades | Maintenance A, Licence A, Quality C | Maintenance A, Licence A, Quality A |
| npm downloads a week | 25 | Not on npm |
| Runs | Local | Local |
| Works with | Claude Code, Claude Desktop, Cursor, Codex, Gemini CLI, VS Code, Windsurf | Claude Code, Claude Desktop, Cursor, Codex, Gemini CLI, VS Code, Windsurf |
| GitHub stars | 0 | 1,320 |
| Last commit | 20 Oct 2026 | 19 Oct 2026 |
| Licence | MIT | MIT |
| Listed since | 20 Oct 2026 | 19 Oct 2026 |
| Install What Devtools MCP | Install Harness |
Questions
Is What Devtools MCP or Harness more popular?
Harness has more GitHub stars: 1,320.
Can I use What Devtools MCP and Harness together?
Yes. AI assistants can load several MCP servers at once. Install both and the assistant picks the right one for each task.