如果你的BLOG系统有Invalid API key. Please obtain one from http://wordpress.com/api-keys/这个回复提醒，意味着你的wordpress或Z-BLOG装了Akismet反垃圾留言插件，并且你没有注册Akismet帐号。
今天袖袖说我的草皮BLOG没法回复留言，评论功能不行了，出现一串“Invalid API key. Please obtain one from,Invalid API key. Please obtain one from http://wordpress.com/api-keys/ ”原来是安装了Akismet反垃圾留言插件的缘故，Akismet你不注册个帐号，他就不让你用。
Akismet反垃圾留言插件导致无法评论的解决方法有哪些？
解决方法一：在后台直接关闭Akismet反垃圾留言插件。
解决方法二：按要求去http://wordpress.com/api-keys/注册个号，然后在插件里面找到“Akismet反垃圾留言系统”插件，添写注册号就可以了。
zblog和wordpress博客不能留言的解决办法（Invalid API key. Please obtain one from http://wordpress.com/api-keys/）就是这么简单。不过现在SEO黑帽手法还是很强大，垃圾留言太多。所以装个Akismet反垃圾留言插件还是有必要的，为了反垃圾留言，还是去注册个帐号吧！
这里还从网上抄来英文版的，充个数！
WordPress.com has what’s called “API keys” which allow you to use services like Akismet and WordPress.com Stats built on the WordPress.com platform. This allows you to leverage the power of WordPress.com while still hosting your blog elsewhere.
How do I get one?
For Akismet users: We have free keys and commercial keys available.
For all other services: When you sign up for a WordPress.com account we will email you an API key. If you already have a WordPress.com account, your API key is listed on your profile page, which you can get to by clicking the “My Account” link in the top left when you’re logged in.
Where will my API key be?
It will be in your welcome email. To make sure you get the email, avoid free services like Hotmail and MSN and check your spam filter if it doesn’t show up in a few minutes. (Also, consider whitelisting *@wordpress.com.)
Can I share my API key?
No, it’s like a password to your account.
