You are looking at the HTML representation of the RAW format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the RAW format, set format=raw.
See the complete documentation, or API help for more information. 
{
                    "query": {
                        "namespaces": {
                            "-2": {
                                "id": -2,
                                "case": "first-letter",
                                "*": "Media",
                                "canonical": "Media"
                            },
                            "-1": {
                                "id": -1,
                                "case": "first-letter",
                                "*": "Special",
                                "canonical": "Special"
                            },
                            "0": {
                                "id": 0,
                                "case": "first-letter",
                                "*": "",
                                "content": ""
                            },
                            "1": {
                                "id": 1,
                                "case": "first-letter",
                                "*": "Talk",
                                "subpages": "",
                                "canonical": "Talk"
                            },
                            "2": {
                                "id": 2,
                                "case": "first-letter",
                                "*": "User",
                                "subpages": "",
                                "canonical": "User"
                            },
                            "3": {
                                "id": 3,
                                "case": "first-letter",
                                "*": "User talk",
                                "subpages": "",
                                "canonical": "User talk"
                            },
                            "4": {
                                "id": 4,
                                "case": "first-letter",
                                "*": "Global wiki. Wargaming.net",
                                "subpages": "",
                                "canonical": "Project"
                            },
                            "5": {
                                "id": 5,
                                "case": "first-letter",
                                "*": "Global wiki. Wargaming.net talk",
                                "subpages": "",
                                "canonical": "Project talk"
                            },
                            "6": {
                                "id": 6,
                                "case": "first-letter",
                                "*": "File",
                                "canonical": "File"
                            },
                            "7": {
                                "id": 7,
                                "case": "first-letter",
                                "*": "File talk",
                                "subpages": "",
                                "canonical": "File talk"
                            },
                            "8": {
                                "id": 8,
                                "case": "first-letter",
                                "*": "MediaWiki",
                                "subpages": "",
                                "canonical": "MediaWiki"
                            },
                            "9": {
                                "id": 9,
                                "case": "first-letter",
                                "*": "MediaWiki talk",
                                "subpages": "",
                                "canonical": "MediaWiki talk"
                            },
                            "10": {
                                "id": 10,
                                "case": "first-letter",
                                "*": "Template",
                                "canonical": "Template"
                            },
                            "11": {
                                "id": 11,
                                "case": "first-letter",
                                "*": "Template talk",
                                "subpages": "",
                                "canonical": "Template talk"
                            },
                            "12": {
                                "id": 12,
                                "case": "first-letter",
                                "*": "Help",
                                "subpages": "",
                                "canonical": "Help"
                            },
                            "13": {
                                "id": 13,
                                "case": "first-letter",
                                "*": "Help talk",
                                "subpages": "",
                                "canonical": "Help talk"
                            },
                            "14": {
                                "id": 14,
                                "case": "first-letter",
                                "*": "Category",
                                "canonical": "Category"
                            },
                            "15": {
                                "id": 15,
                                "case": "first-letter",
                                "*": "Category talk",
                                "subpages": "",
                                "canonical": "Category talk"
                            },
                            "10000": {
                                "id": 10000,
                                "case": "first-letter",
                                "*": "Tank",
                                "canonical": "Tank",
                                "content": ""
                            },
                            "10001": {
                                "id": 10001,
                                "case": "first-letter",
                                "*": "Tank talk",
                                "canonical": "Tank talk"
                            },
                            "10002": {
                                "id": 10002,
                                "case": "first-letter",
                                "*": "Plane",
                                "canonical": "Plane",
                                "content": ""
                            },
                            "10003": {
                                "id": 10003,
                                "case": "first-letter",
                                "*": "Plane talk",
                                "canonical": "Plane talk"
                            },
                            "10004": {
                                "id": 10004,
                                "case": "first-letter",
                                "*": "Ship",
                                "canonical": "Ship",
                                "content": ""
                            },
                            "10005": {
                                "id": 10005,
                                "case": "first-letter",
                                "*": "Ship talk",
                                "canonical": "Ship talk"
                            },
                            "10006": {
                                "id": 10006,
                                "case": "first-letter",
                                "*": "Card",
                                "canonical": "Card",
                                "content": ""
                            },
                            "10007": {
                                "id": 10007,
                                "case": "first-letter",
                                "*": "Card talk",
                                "canonical": "Card talk"
                            },
                            "10008": {
                                "id": 10008,
                                "case": "first-letter",
                                "*": "Navy",
                                "canonical": "Navy",
                                "content": ""
                            },
                            "10009": {
                                "id": 10009,
                                "case": "first-letter",
                                "*": "Navy talk",
                                "canonical": "Navy talk"
                            },
                            "10010": {
                                "id": 10010,
                                "case": "first-letter",
                                "*": "Blitz",
                                "canonical": "Blitz",
                                "content": ""
                            },
                            "10011": {
                                "id": 10011,
                                "case": "first-letter",
                                "*": "Blitz talk",
                                "canonical": "Blitz talk"
                            },
                            "10012": {
                                "id": 10012,
                                "case": "first-letter",
                                "*": "XBOX",
                                "canonical": "XBOX",
                                "content": ""
                            },
                            "10013": {
                                "id": 10013,
                                "case": "first-letter",
                                "*": "XBOX talk",
                                "canonical": "XBOX talk"
                            },
                            "10014": {
                                "id": 10014,
                                "case": "first-letter",
                                "*": "TWA",
                                "canonical": "TWA",
                                "content": ""
                            },
                            "10015": {
                                "id": 10015,
                                "case": "first-letter",
                                "*": "TWA talk",
                                "canonical": "TWA talk"
                            },
                            "10016": {
                                "id": 10016,
                                "case": "first-letter",
                                "*": "Antiquity",
                                "canonical": "Antiquity",
                                "content": ""
                            },
                            "10017": {
                                "id": 10017,
                                "case": "first-letter",
                                "*": "Antiquity talk",
                                "canonical": "Antiquity talk"
                            },
                            "10018": {
                                "id": 10018,
                                "case": "first-letter",
                                "*": "Caliber",
                                "canonical": "Caliber",
                                "content": ""
                            },
                            "10019": {
                                "id": 10019,
                                "case": "first-letter",
                                "*": "Caliber talk",
                                "canonical": "Caliber talk"
                            },
                            "10020": {
                                "id": 10020,
                                "case": "first-letter",
                                "*": "SpecOps",
                                "canonical": "SpecOps",
                                "content": ""
                            },
                            "10021": {
                                "id": 10021,
                                "case": "first-letter",
                                "*": "SpecOps talk",
                                "canonical": "SpecOps talk"
                            },
                            "_element": "ns"
                        }
                    }
                }