diff --git a/autoload/SpaceVim/api/vim/buffer.vim b/autoload/SpaceVim/api/vim/buffer.vim
new file mode 100644
index 000000000..6975ba7b9
--- /dev/null
+++ b/autoload/SpaceVim/api/vim/buffer.vim
@@ -0,0 +1,34 @@
+let s:self = {}
+
+
+if exists('*getcmdwintype')
+  function! s:self.is_cmdwin() abort
+    return getcmdwintype() !=# ''
+  endfunction
+else
+  function! s:self.is_cmdwin() abort
+    return bufname('%') ==# '[Command Line]'
+  endfunction
+endif
+
+function! s:self.open(opts) abort
+    let buf = get(a:opts, 'bufname', '')
+    let mode = get(a:opts, 'mode', 'vertical topleft split')
+    let cmd = get(a:opts, 'cmd', '')
+    if empty(buf)
+        exe mode bufopt
+    else
+        exe mode buf
+    endif
+    exe cmd
+endfunction
+
+
+func! s:self.resize(size, ...) abort
+	let cmd = get(a:000, 0, 'vertical')
+	exe cmd 'resize' a:size
+endf
+
+fu! SpaceVim#api#vim#buffer#get()
+   return deepcopy(s:self)
+endf
diff --git a/autoload/SpaceVim/api/vim/message.vim b/autoload/SpaceVim/api/vim/message.vim
new file mode 100644
index 000000000..b707be869
--- /dev/null
+++ b/autoload/SpaceVim/api/vim/message.vim
@@ -0,0 +1,50 @@
+" ============================================================================
+" File:        message.vim
+" Description: vim#message api of SpaceVim
+" Author:      L-stt
+" Website:     https://spacevim.org
+" License:     MIT
+" ============================================================================
+
+""
+" @section vim#message, api-vim-message
+" @parentsection api
+
+function! SpaceVim#api#vim#compatible#get() abort
+  return map({
+        \ 'echo' : '',
+        \ 'echomsg': '',
+        \ 'error': '',
+        \ 'warn': '',
+        \ },
+        \ "function('s:' . v:key)"
+        \ )
+endfunction
+
+function! s:echo(hl, msg) abort
+  execute 'echohl' a:hl
+  try
+    echo a:msg
+  finally
+    echohl None
+  endtry
+endfunction
+
+function! s:echomsg(hl, msg) abort
+  execute 'echohl' a:hl
+  try
+    for m in split(a:msg, "\n")
+      echomsg m
+    endfor
+  finally
+    echohl None
+  endtry
+endfunction
+
+function! s:error(msg) abort
+  call s:echomsg('ErrorMsg', a:msg)
+endfunction
+
+function! s:warn(msg) abort
+  call s:echomsg('WarningMsg', a:msg)
+endfunction
diff --git a/autoload/SpaceVim/api/vim/sid.vim b/autoload/SpaceVim/api/vim/sid.vim
new file mode 100644
index 000000000..d9b98fe10
--- /dev/null
+++ b/autoload/SpaceVim/api/vim/sid.vim
@@ -0,0 +1,49 @@
+" ============================================================================
+" File:        sid.vim
+" Description: vim#sid api of SpaceVim
+" Author:      L-stt
+" Website:     https://spacevim.org
+" License:     MIT
+" ============================================================================
+
+""
+" @section sid, api-vim-sid
+" @parentsection api
+"" Capture command
+
+let s:self = {}
+
+let s:self._cache = {}
+
+function! s:self._capture(command) abort
+  try
+    let save_verbose = &verbose
+    let &verbose = 0
+    redir => out
+    silent execute a:command
+  finally
+    redir END
+    let &verbose = save_verbose
+  endtry
+  return out
+endfunction
+function! s:self._unify_path(path) abort
+  return resolve(fnamemodify(a:path, ':p:gs?[\\/]?/?'))
+endfunction
+"" Capture command and return lines
+function! s:self._capture_lines(command) abort
+  return split(self._capture(a:command), "\n")
+endfunction
+
+
+function! s:self.scriptnames() abort
+  let sdict = {} " { sid: path }
+  for line in self._capture_lines(':scriptnames')
+    let [sid, path] = split(line, '\m^\s*\d\+\zs:\s\ze')
+    let sdict[str2nr(sid)] = self._unify_path(path)  " str2nr(): '  1' -> 1
+  endfor
+  return sdict
+endfunction
+function! SpaceVim#api#vim#sid#get() abort
+    return deepcopy(s:self)
+endfunction
diff --git a/autoload/SpaceVim/api/vim/tab.vim b/autoload/SpaceVim/api/vim/tab.vim
new file mode 100644
index 000000000..a5e4e4fb1
--- /dev/null
+++ b/autoload/SpaceVim/api/vim/tab.vim
@@ -0,0 +1,17 @@
+let s:self = {}
+
+let s:self._tree = {}
+
+function! s:self._update() abort
+    let tabnr = tabpagenr('$')
+    if tabnr > 1
+        for i in range(1, tabnr)
+            let buffers = tabpagebuflist(i)
+            let self._tree[i] = buffers
+        endfor
+    endif
+endfunction
+
+function! s:self._jump(tabnr, bufid) abort
+    
+endfunction
diff --git a/doc/SpaceVim.txt b/doc/SpaceVim.txt
index f69cbd1ef..5f137c6ab 100644
--- a/doc/SpaceVim.txt
+++ b/doc/SpaceVim.txt
@@ -47,6 +47,8 @@ CONTENTS                                                   *SpaceVim-contents*
       24. tmux...........................................|SpaceVim-layer-tmux|
   6. API........................................................|SpaceVim-api|
       1. cmdlinemenu................................|SpaceVim-api-cmdlinemenu|
+      2. sid............................................|SpaceVim-api-vim-sid|
+      3. vim#message................................|SpaceVim-api-vim-message|
   7. FAQ........................................................|SpaceVim-faq|
 
 ==============================================================================
@@ -909,6 +911,14 @@ Create a cmdline selection menu from a list of {items}, each item should be a
 list of two value in it, first one is the description, and the next one should
 be a funcrc.
 
+==============================================================================
+SID                                                     *SpaceVim-api-vim-sid*
+
+" Capture command
+
+==============================================================================
+VIM#MESSAGE                                         *SpaceVim-api-vim-message*
+
 ==============================================================================
 FAQ                                                             *SpaceVim-faq*
 
diff --git a/test/api/vim/buffer.vader b/test/api/vim/buffer.vader
new file mode 100644
index 000000000..c60f19aa2
--- /dev/null
+++ b/test/api/vim/buffer.vader
@@ -0,0 +1,6 @@
+Execute ( SpaceVim api: vim#buffer ):
+  new
+  let buffer = SpaceVim#api#import('vim#buffer')
+  call buffer.open({'bufname':'foo', 'cmd' : 'setl buftype=nofile bufhidden=wipe'})
+  AssertEqual bufname('%'), 'foo'
+  AssertEqual &buftype, 'nofile'