correct me if im wrong, but a authentication url may be needed.
iirc correctly it is used for both verifying your identity aswell as joining you with your account as it uses that token to retreive your account details and log you into the game.
Revisiting the issue of the gameinstancesjson issue, roblox wouldnt deprecate an API Endpoint unless it was replaced with another, and/or it was a risk for hackers/cheats.
In this case, This endpoint Below lists all game servers in a json format. it will also return a job id as “id” which iirc is also required for gamejoining.
https://games.roblox.com/v1/games/2788229376/servers/0?sortOrder=2&excludeFullGames=false&limit=10
This Endpoint Returns This Code:
{
"previousPageCursor": null,
"nextPageCursor": "eyJzdGFydEluZGV4IjoxMCwiZGlzY3JpbWluYXRvciI6InBsYWNlSWQ6Mjc4ODIyOTM3NnNlcnZlclR5cGU6MCIsImNvdW50IjoxMH0KYWJlOTFjOTc0NzBmOWJlODMwMGQ0YjIyNGQ5M2FhZWU3MGNiNGU2MzJmYmExYzY4ZDZmNWM4NTU0NWI5ZDVmMg==",
"data": [
{
"id": "b32de54b-6a2f-4dac-a54e-a03a8105267b",
"maxPlayers": 40,
"playing": 40,
"playerTokens": [
"AAAF4144CAA7E74AF6E7F8955EEA9069",
"ED6D95FDEC7D2A704D8857357B94D038",
"DB97D36604539BBCD070B1C2A2C6C67E",
"89D32FC50370EE987B296A02AFA588AB",
"7B80F0D913DA9C4C5D322E5EA050418F"
],
"players": [],
"fps": 60.000629,
"ping": 88
},
{
"id": "47f7dc2a-b973-4f31-8eec-f69f9a8f982c",
"maxPlayers": 40,
"playing": 40,
"playerTokens": [
"78937D9D7866B68FEB0918701A067C52",
"48665F778B3639F929108F97EFCEA322",
"E714AC8067FC56CB21BA02C2DC7C9FE4",
"544D27E8C2770206DF993846497335D3",
"7377178EE9EABB02ACA806604196EAA4"
],
"players": [],
"fps": 59.93132,
"ping": 83
},
{
"id": "a396b503-53be-4c6d-b38a-7682c60aa1ea",
"maxPlayers": 40,
"playing": 40,
"playerTokens": [
"EF5A05D137C8526F4881A5E6830A7DF8",
"43F7820C71F0BC1BEF467534DF2952DD",
"B637A24CAFAA81D8BBDF2E79436F501E",
"D7E63C44787CC6E5F8108225991D5101",
"DFAF18F47DCBB75C1ED37944FDA3E21E"
],
"players": [],
"fps": 59.944923,
"ping": 61
},
{
"id": "b472e631-c485-4cd0-b668-fd8b7aac58cd",
"maxPlayers": 40,
"playing": 40,
"playerTokens": [
"9C13DF0395573A856752C278E0AA5B93",
"555448EE066B0589FD05C2F626DB352F",
"F427F667E8BEE28A5166BC4812A85E6F",
"511362B783BA00889829BBD89C20EE46",
"7312B02624801137300A66B76D8A1A7B"
],
"players": [],
"fps": 59.985958,
"ping": 55
},
{
"id": "b8734b6e-facb-48bf-9ed4-c17c603611a3",
"maxPlayers": 40,
"playing": 40,
"playerTokens": [
"B4CD9D358B8D2C745F55EC562369E7B2",
"F224A22171E3EFE9B7D641CB6702591F",
"865CD6DEDBF56A2DD41C7F0816C0F5DE",
"DC6595EE8792C523FCC04FF8532D27E3",
"38B2E8BEE1A47FADBC3CCAAEBAB91A7F"
],
"players": [],
"fps": 59.937588,
"ping": 58
},
{
"id": "b5ec0ae8-eea1-4e36-87db-09b15ec7b33b",
"maxPlayers": 40,
"playing": 40,
"playerTokens": [
"AB5C5A9E62A82E49DEC4151D23BD1BAE",
"FF52F025089049592ECA27B9F9693964",
"1B0C926341BA385F277B986A04CC8281",
"A0F769F904C3DD41AF6839106D55BD89",
"A87A8EB7BED425388A04C0CC733E3B2D"
],
"players": [],
"fps": 59.931255,
"ping": 63
},
{
"id": "83b82b3d-44ed-446c-ae31-fb146cebdc78",
"maxPlayers": 40,
"playing": 39,
"playerTokens": [
"F32DE86734257DDAD1B1EB4FFAE5C493",
"90541340469820F9E2079CB2A0E6FC96",
"46DE06BC6C063312575218E70C81413C",
"EBC3C7F50E23AD5C6A5ABC1072E53E0D",
"85D7237A01D454ACB398DDFB471F613B"
],
"players": [],
"fps": 58.701649,
"ping": 82
},
{
"id": "697cbd0a-e4ae-4294-8d92-3a9d710b8b27",
"maxPlayers": 40,
"playing": 39,
"playerTokens": [
"2D3CD8069C5F1D43475446E7910ED212",
"737071CB4752E1ED3579F38B4D4D893E",
"BE2A7C257A6086873B26987205907888",
"DC3D0C0FA35695D19B4C3A35301E714F",
"82686073CFE16EA26ED7F336D5B8334B"
],
"players": [],
"fps": 59.931576,
"ping": 65
},
{
"id": "8cb77a71-9496-4308-b2b5-9642ddcb27c6",
"maxPlayers": 40,
"playing": 39,
"playerTokens": [
"FB457FEE59C4EEB353EBA31EE0FC1FFE",
"513EEB439949232B8569F2A81C05D680",
"4B436AB699D016D759B78B80F87DBD01",
"9918388C3376853CCAD964ED4CA208D7",
"F47C5FA7952D2FD024C2A1B247EF1740"
],
"players": [],
"fps": 59.955715,
"ping": 37
},
{
"id": "1f9c9bab-ba41-403b-bd0b-d909ae33caec",
"maxPlayers": 40,
"playing": 38,
"playerTokens": [
"7335D1A4C89A7634F909A9386BB9751E",
"630C4D3E94C82EABCB8503827940205D",
"79436BF4FF4DF9103CBDBCE4EC4EF9C9",
"5C0C9B67B2A73DCB015309D34E0DE111",
"EDC9EF247FBB1BEEFABCAF41BB96F5E0"
],
"players": [],
"fps": 59.944077,
"ping": 62
}
]
}
Im sorry if im not helping as im pretty sure this is what you are trying to specify, if you need anymore help please feel free to reply with your question!
cheers, MrolivesGaming (Oliver)