For the following example we assume the following:
9A1hB7KnXrrU6SHX
mneiuMPMDugkteYJTBz35reKeiUMYsrl
IIOYznZuU7Z6eAoQSKWINaG5hDP0Dxp4
rSnhRDNiA1ErshZxiBdfoEOV5YGf9k1F
/ws/stock
(to get all articles the user has on MKM)The most important thing to take care of is the OAuth Header. That's why you find everything about it there. Once you're familiar with building the OAuth header, it's easy to request protected resources.
GET https://api.cardmarket.com/ws/stock Authorization: OAuth realm="https://api.cardmarket.com/ws/v1.1/stock", oauth_version="1.0", oauth_timestamp="1394701063", oauth_nonce="YPSM0TqkRKSwxOINSiVh", oauth_consumer_key="9A1hB7KnXrrU6SHX", oauth_token="IIOYznZuU7Z6eAoQSKWINaG5hDP0Dxp4", oauth_signature_method="HMAC-SHA1", oauth_signature="tj1A12h5T2w8QGMjQEF+AUzaMc0="