diff --git a/README.md b/README.md
index e524f8a..1a27d80 100644
--- a/README.md
+++ b/README.md
@@ -398,6 +398,14 @@ Specify whether to display ghost text.
 Default: `false`
 
 
+Commands
+====================
+
+#### `CmpStatus`
+
+Show the source statuses
+
+
 Programatic API
 ====================
 
@@ -435,6 +443,10 @@ Scroll documentation window if possible.
 FAQ
 ====================
 
+#### I can't get the specific source working.
+
+You should check `:CmpStatus` command's output. Probably, your specified source name is wrong.
+
 #### What is the `pairs-wise plugin automatically supported`?
 
 Some pairs-wise plugin set up the mapping automatically.
diff --git a/lua/cmp/config.lua b/lua/cmp/config.lua
index ad63222..ff4c6f1 100644
--- a/lua/cmp/config.lua
+++ b/lua/cmp/config.lua
@@ -65,7 +65,7 @@ config.get_source_config = function(name)
         return s
       end
     end
-    return {}
+    return nil
   end)
 end
 
diff --git a/lua/cmp/init.lua b/lua/cmp/init.lua
index 6464199..05167f7 100644
--- a/lua/cmp/init.lua
+++ b/lua/cmp/init.lua
@@ -110,6 +110,68 @@ cmp.confirm = function(option)
   end
 end
 
+---Show status
+cmp.status = function()
+  vim.cmd [[doautocmd InsertEnter]]
+
+  local kinds = {}
+  kinds.available = {}
+  kinds.unavailable = {}
+  kinds.installed = {}
+  kinds.invalid = {}
+  local names = {}
+  for _, s in pairs(core.sources) do
+    names[s.name] = true
+
+    if config.get_source_config(s.name) then
+      if s:is_available() then
+        table.insert(kinds.available, s:get_debug_name())
+      else
+        table.insert(kinds.unavailable, s:get_debug_name())
+      end
+    else
+      table.insert(kinds.installed, s:get_debug_name())
+    end
+  end
+  for _, s in ipairs(config.get().sources) do
+    if not names[s.name] then
+      table.insert(kinds.invalid, s.name)
+    end
+  end
+
+  if #kinds.available > 0 then
+    vim.api.nvim_echo({ { '\n', 'Normal' } }, false, {})
+    vim.api.nvim_echo({ { '# ready source names\n', 'Special' } }, false, {})
+    for _, name in ipairs(kinds.available) do
+      vim.api.nvim_echo({ { ('- %s\n'):format(name), 'Normal' } }, false, {})
+    end
+  end
+
+  if #kinds.unavailable > 0 then
+    vim.api.nvim_echo({ { '\n', 'Normal' } }, false, {})
+    vim.api.nvim_echo({ { '# unavailable source names\n', 'Comment' } }, false, {})
+    for _, name in ipairs(kinds.unavailable) do
+      vim.api.nvim_echo({ { ('- %s\n'):format(name), 'Normal' } }, false, {})
+    end
+  end
+
+  if #kinds.installed > 0 then
+    vim.api.nvim_echo({ { '\n', 'Normal' } }, false, {})
+    vim.api.nvim_echo({ { '# unused source names\n', 'WarningMsg' } }, false, {})
+    for _, name in ipairs(kinds.installed) do
+      vim.api.nvim_echo({ { ('- %s\n'):format(name), 'Normal' } }, false, {})
+    end
+  end
+
+  if #kinds.invalid > 0 then
+    vim.api.nvim_echo({ { '\n', 'Normal' } }, false, {})
+    vim.api.nvim_echo({ { '# unknown source names\n', 'ErrorMsg' } }, false, {})
+    for _, name in ipairs(kinds.invalid) do
+      vim.api.nvim_echo({ { ('- %s\n'):format(name), 'Normal' } }, false, {})
+    end
+  end
+end
+
 ---@type cmp.Setup
 cmp.setup = setmetatable({
   global = function(c)
diff --git a/lua/cmp/source.lua b/lua/cmp/source.lua
index 57fa9e2..b384558 100644
--- a/lua/cmp/source.lua
+++ b/lua/cmp/source.lua
@@ -63,7 +63,7 @@ end
 ---Return source option
 ---@return cmp.SourceConfig
 source.get_config = function(self)
-  return config.get_source_config(self.name)
+  return config.get_source_config(self.name) or {}
 end
 
 ---Get fetching time
@@ -175,7 +175,7 @@ source.get_debug_name = function(self)
   if self.source.get_debug_name then
     name = self.source:get_debug_name()
   end
-  return name .. '(' .. self.id .. ')'
+  return name
 end
 
 ---Return the source is available or not.
diff --git a/plugin/cmp.lua b/plugin/cmp.lua
index cd3ff13..374d3ff 100644
--- a/plugin/cmp.lua
+++ b/plugin/cmp.lua
@@ -17,3 +17,5 @@ vim.cmd [[
 
 vim.cmd [[inoremap <silent> <Plug>(cmp-autoindent) <C-o>:normal!==<CR>]]
 
+vim.cmd [[command! CmpStatus lua require('cmp').status()]]
+