Not possible to test GET /path/{docId}/@blob/{blobXpath}/@convert from /nuxeo/api/v1/doc

• Access to your server [[NUXEO_SERVER]]/nuxeo/api/v1/doc
• Expand the convertAdapter : Convert Blobs section
• Select the

  GET /path/{docId}/@blob/{blobXpath}/@convert

  method

You can provide the docId, but you can't provide blobXpath, so you can successfully call the method.