A side-by-side look at the 4da MCP Server and Butterfly Delta Preflight MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose 4da MCP Server for security work as a local process; choose Butterfly Delta Preflight for finance & fintech. You can also run both side by side in one mcpServers block.
Rows where the two servers differ are marked.
| Spec | B Butterfly Delta Preflight | |
|---|---|---|
| Category | Security | Finance & Fintech |
| Quality signal | 45/100 · Fair | 37/100 · Fair |
| Install command | Confirmed | Not confirmed yet |
| Transport | Local subprocess (stdio) | — |
| Auth | Not declared | Not declared |
| Pricing | Not declared | Not declared |
| Required env vars | None listed | None listed |
| Verified owner | Community listing | Community listing |
| GitHub stars | 2 | — |
| Directory activity | 2 views 0 installs 0 upvotes | 0 views 0 installs 0 upvotes |
| Tools | Not listed | Not listed |
| Full listing | View 4da MCP Server | View Butterfly Delta Preflight |
No tool names declared yet. Check the project README from the listing page.
No tool names declared yet. Check the project README from the listing page.
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
{
"mcpServers": {
"4da-mcp-server": {
"command": "npx",
"args": [
"-y",
"@4da/mcp-server"
]
}
}
}
No confirmed install command for Butterfly Delta Preflight yet — follow the setup steps linked from its listing page rather than a guessed package name.