Invalid webservice adapter specified REST API

Question

I have configured the rest api in my localhost magento. When I Hit this url, http://localhost/magento/api/rest/products

The error is:

Invalid webservice adapter specified.

Answer 1

This errors comes from here: \Mage_Api_Model_Server::initialize

You are using the rest adapter, which is defined in app/code/core/Mage/Api/etc/api.xml

    <adapters>
        <soap>
            <model>api/server_adapter_soap</model>
            <handler>default</handler>
            <active>1</active>
            <required>
                <extensions>
                    <soap />
                </extensions>
            </required>
        </soap>
        <soap_v2>
            <model>api/server_v2_adapter_soap</model>
            <handler>soap_v2</handler>
            <active>1</active>
            <required>
                <extensions>
                    <soap />
                </extensions>
            </required>
        </soap_v2>
        <soap_wsi>
            <model>api/server_wsi_adapter_soap</model>
            <handler>soap_wsi</handler>
            <active>1</active>
            <required>
                <extensions>
                    <soap />
                </extensions>
            </required>
        </soap_wsi>
        <xmlrpc>
            <model>api/server_adapter_xmlrpc</model>
            <handler>default</handler>
            <active>1</active>
        </xmlrpc>
        <default>
            <use>soap</use>
        </default>
    </adapters>

It might help to uncomment the line in .htaccess

############################################
## uncomment next line to enable light API calls processing

#    RewriteRule ^api/([a-z][0-9a-z_]+)/?$ api.php?type=$1 [QSA,L]

############################################
## rewrite API2 calls to api.php (by now it is REST only)

    RewriteRule ^api/rest api.php?type=rest [QSA,L]

Answer 2

The following solution fixed the issue for me.

If you're sure you have the following line uncomented in .htaccess:

RewriteRule ^api/rest api.php?type=rest [QSA,L]

...and it still does not work, then please be sure you have turned off MultiViews option in apache. For example:

<VirtualHost *:80>
    ServerName magento.local
    DocumentRoot "c:/www/magento"
    <Directory  "c:/www/magento/">
        Options +Indexes +Includes +FollowSymLinks -MultiViews
        AllowOverride All
        Require local
    </Directory>
</VirtualHost>

Pay attention to -MultiViews above.