Where can I get Google developer key

I am working on Google API like chat, contacts and so on... I am stuck on developer_key as mentioned in gdata doc.

You can get this at https://code.google.com/apis/console:

'developer_key' => ''

I have already:

// OAuth2 Settings, you can get these keys at https://code.google.com/apis/console 'oauth2_client_id' => '', 'oauth2_client_secret' => '', 'oauth2_redirect_uri' => ''

Where can I find developer key?

I found some thing like this

http://code.google.com/apis/youtube/dashboard/gwt/index.html

But I understand this to be only for youtube.

How do I get a Google key?

To create an API key: Navigate to the APIs & Services→Credentials panel in console. Select Create credentials, then select API key from the dropdown menu. The API key created dialog box displays your newly created key.

Is Google API key free?

Obtaining a Google Maps API keyGoogle lets you make 1000 API requests per key for free.

What is my Google API key?

The API key is a unique identifier that authenticates requests associated with your project for usage and billing purposes. You must have at least one API key associated with your project.

It's the API key as listed under 'API Access', the 'Simple API Access' box.