BMI Kit vs Magic MCP
A side-by-side look at the BMI Kit and Magic MCP MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
B
BMI KitDeveloper Tools · Remote HTTP/SSEBody composition for AI: BMI, body fat, FFMI, waist-to-height, plus saved measurement trends.42FairAuth: not declaredVerdict: choose BMI Kit for developer tools work over a hosted endpoint; choose Magic MCP for architecture & design as a local process. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
BChoose BMI Kit when
- You need dedicated capabilities in the Developer Tools domain.
- You prefer a remote HTTP/SSE transport.
Choose Magic MCP when
- You need dedicated capabilities in the Architecture & Design domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: API key required.
- You have the keys it needs:
TWENTY_FIRST_API_KEY, API_KEY_21ST.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | B BMI Kit | |
|---|---|---|
| Category | Developer Tools | Architecture & Design |
| Quality signal | 42/100 · Fair | 53/100 · Good |
| Install command | Confirmed | Confirmed |
| Transport | Remote HTTP/SSE | Local subprocess (stdio) |
| Auth | Not declared | API key required |
| Pricing | Not declared | Paid service |
| Required env vars | None listed | TWENTY_FIRST_API_KEYAPI_KEY_21ST |
| Verified owner | Community listing | Community listing |
| GitHub stars | — | 6,193 |
| Directory activity | 1 views 0 installs 0 upvotes | 16 views 1 installs 0 upvotes |
| Tools | Not listed | Not listed |
| Full listing | View BMI Kit | View Magic MCP |
Tools & capabilities
BMI Kit tools
No tool names declared yet. Check the project README from the listing page.
Magic MCP tools
No tool names declared yet. Check the project README from the listing page.
Ready-to-paste client configs
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.
BMI Kit
{
"mcpServers": {
"bmi-kit-2": {
"url": "https://bmikit.com/mcp"
}
}
}
Magic MCP
{
"mcpServers": {
"21st-dev-magic-mcp": {
"command": "npx",
"args": [
"-y",
"@21st-dev/cli@latest"
],
"env": {
"TWENTY_FIRST_API_KEY": "YOUR_TWENTY_FIRST_API_KEY_HERE",
"API_KEY_21ST": "YOUR_API_KEY_21ST_HERE"
}
}
}
}
Frequently asked questions
BMI Kit is categorized under Developer Tools and uses a remote HTTP/SSE transport. Magic MCP belongs to Architecture & Design and uses a local stdio subprocess. Pick BMI Kit for developer tools work and Magic MCP for architecture & design.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.
BMI Kit has no declared pricing — check the project's own site. Magic MCP is listed as a paid service. Auth: api key required. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add bmi-kit-2 and 21st-dev-magic-mcp as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, BMI Kit has a quality signal of 42/100 (Fair) with 1 views, 0 installs and 0 GitHub stars. Magic MCP has 53/100 (Good) with 16 views, 1 installs and 6,193 GitHub stars.