Exit the service with:

$ curl -XPOST -H "Content-Type: application/json" \
    -d '{"method": "Magma.Exit", "params": [], "id": 1}' \
    localhost:8080/api

Create a ZIP archive with encrypted files in it with:

$ curl -XPOST -H "Content-Type: application/json" \
    -d '{"method": "Magma.CreateArchive", \
    "params": [{ \
        "password": "mypasswd", "outputname": "/tmp/archive.zip", \
        "files": ["/tmp/file1.jpg", "/tmp/file2.pdf"] \
    }], "id": 1}' localhost:8080/api

Extract all encrypted files to plain text files from the archive:

$ curl -XPOST -H "Content-Type: application/json" \
    -d '{"method": "Magma.ExtractAll", \
    "params": [{ \
        "password": "mypasswd", "archive": "/tmp/archive.zip", \
        "outputdir": "/tmp" \
    }], "id": 1}' localhost:8080/api

Extract one file at position 2 (the third one, 0-indexed):

$ curl -XPOST -H "Content-Type: application/json" \
    -d '{"method": "Magma.ExtractAt", \
    "params": [{ \
        "password": "mypasswd", "archive": "/tmp/archive.zip", \
        "outputdir": "/tmp", "pos": 2 \
    }], "id": 1}' localhost:8080/api