bun-fun
Simple local stdio MCP server example compiled with Bun
Install dependencies
bun install
Build executable
bun run build
Add to Claude Desktop
Executable:
{
...
"mcpServers": {
"example-mcp-server": {
"command": "<path-to-executable>"
}
}
}
Development:
{
...
"mcpServers": {
"example-mcp-server-dev": {
"command": "bun",
"args": ["run", "<path-to-index.ts>"]
}
}
}
Windows
- Config:
%APPDATA%\Claude\claude_desktop_config.json - Executable:
C:\\path\\to\\bun-fun\\mcp-server.exe - Development:
C:\\path\\to\\bun-fun\\index.ts
macOS
- Config:
~/Library/Application Support/Claude/claude_desktop_config.json - Executable:
/path/to/bun-fun/mcp-server - Development:
/path/to/bun-fun/index.ts
Add to Claude Code
CLI
Executable:
claude mcp add example-mcp-server "<path-to-executable>"
Development:
claude mcp add example-mcp-server-dev "bun" --args "run" "<path-to-index.ts>"
Windows
- Executable:
C:\\path\\to\\bun-fun\\mcp-server.exe - Development:
C:\\path\\to\\bun-fun\\index.ts
macOS/Linux
- Executable:
/path/to/bun-fun/mcp-server - Development:
/path/to/bun-fun/index.ts
From Claude Desktop
[!NOTE] macOS and WSL only.
claude mcp add-from-claude-desktop
To-do
- IDE examples
Available MCP Tools
This server provides the following MCP tools:
get_current_time
Returns the current time in ISO format.
Parameters: None
Example response: 2025-09-20T15:30:45.123Z
echo
Echoes back the provided message.
Parameters:
message(string, required): The message to echo back
Example:
- Input:
{ "message": "Hello, world!" } - Output:
Echo: Hello, world!
add_numbers
Adds two numbers together.
Parameters:
a(number, required): First numberb(number, required): Second number
Example:
- Input:
{ "a": 5, "b": 3 } - Output:
5 + 3 = 8