~/Library/Application Support/Claude/claude_desktop_config.json%APPDATA%\Claude\claude_desktop_config.json~/.config/Claude/claude_desktop_config.json{
"mcpServers": {
"secondhand": {
"command": "npx",
"args": [
"-y",
"secondhand-mcp"
],
"env": {
"EBAY_CLIENT_ID": "your-ebay-client-id",
"EBAY_CLIENT_SECRET": "your-ebay-client-secret"
}
}
}
}