Here is a breakdown of the new stream key API and how to use it. (Note: This page is a work in progress).

Stream Key Explanation

A stream key is generated from within the game settings in the Settings > Game > Stream Key section. A player can use their 64-bit Steam ID, with the in-game Stream Key, to generate a URL allowing access to the API. The URL takes the following form:

https://tb-api.xyz/stream/get?s=[your SteamID64]&key=[your stream key]

When a player has started playing with the stream key enabled, the page accessed with the URL will display a JSON string with a format similar to the one below:

{ "current": { "char": 2, "lasthit": 15, "world": 3, "level": 1, "crown": 1, "wepA": 4, "wepB": 20, "skin": 0, "ultra": 0, "charlvl": 4, "loops": 0, "win": false, "mutations": "00000000000000000000010100010", "kills": 86, "health": 1, "steamid": 76561198054979849, "type": "normal", "timestamp": 1453917332 }, "previous": null }

Sections of the Stream Key

The stream key is a JSON file with multiple fields, each containing a value corresponding to the status of the player during the most recent update. An example JSON string is shown below.

Current / Previous

If the run is noted as "current", this means it's currently in progress. If it's noted as "previous", it means it has ended and will no longer be updated. When a run ends, it gets moved from "current" to "previous", and the former "previous" run gets removed.

If there are no available runs, the value will be "null" like in the example above. Runs automatically expire 30 minutes after not being updated.

Health

The current health total of the player.

"health":

B-Skin

Indicates if the player is currently using a B-Skin.

"skin": 0

or

"skin": 1

Character

Indicates the current character being played. The characters are displayed as numbers from 1 to 15, not including 13. The last two are the secret characters.

Number	Character
1	Fish
2	Crystal
3	Eyes
4	Melting
5	Plant
6	Y.V.
7	Steroids
8	Robot
9	Chicken
10	Rebel
11	Horror
12	Rogue
14	Skeleton
15	Frog

Mutations

Indicates the current mutations chosen by the player. The player's mutation status is held in a 29-bit binary number, with each bit representing one mutation. A bit set to '1' indicates that the player has that mutation. A bit set to '0' indicates that the player does not have that mutation.

The JSON is in the following format:

"mutations":"00001000000000000010000001000"

The mutations are as follows (with bit positions relative to the first position, big-endian):

Bit Position	Mutation If Bit Set
0	Heavy Heart
1	Rhino Skin
2	Extra Feet
3	Plutonium Hunger
4	Rabbit Paw
5	Throne Butt
6	Lucky Shot
7	Bloodlust
8	Gamma Guts
9	Second Stomach
10	Back Muscle
11	Scarier Face
12	Euphoria
13	Long Arms
14	Boiling Veins
15	Shotgun Shoulders
16	Recycle Gland
17	Laser Brain
18	Last Wish
19	Eagle Eyes
20	Impact Wrists
21	Bolt Marrow
22	Stress
23	Trigger Fingers
24	Sharp Teeth
25	Patience
26	Hammerhead
27	Strong Spirit
28	Open Mind

Area

The current area of the player.

The JSON is in the following format:

"level":1

The normal area numbers are the same as they appear in game (1-1, 1-2, 1-3, etc.). The majority of secret levels have an area of 1, as they are considered their own world. Crown vaults seem to have different area values depending on which level you entered them from and whether or not you entered with a crown. (Additional testing is ongoing regarding secret levels and crown vaults.)

[TODO: Learn more about the loop levels (Campfire/HQ), as well as crown vaults]

Crown

Indicates the current crown of the player.

Crown Number	Crown
1	No Crown
2	Crown of Death
3	Crown of Life
4	Crown of Haste
5	Crown of Guns
6	Crown of Hatred
7	Crown of Blood
8	Crown of Destiny
9	Crown of Love
10	Crown of Luck
11	Crown of Curses
12	Crown of Risk
13	Crown of Protection

World

The current world of the player.

The JSON is in the following format:

"world":2

The world numbers are the same as they appear in game (World 1 being the Desert, World 2 being the Sewers, etc.), with the exception of the secret levels.

World Number	World Name
100	Crown Vault
1	Desert
101	Oasis
2	Sewers
102	Pizza Sewers
3	Scrapyard
103	Y.V's Mansion
4	Crystal Caves
104	Cursed Crystal Caves
5	Frozen City
105	Jungle
6	Labs
7	The Palace
0	Campfire
107	Y.V's Crib
106	I.D.P.D. Headquarters

[TODO: Complete list of worlds]

Loop

Indicates the current loop number.

The JSON is in the following format:

"loops":0

Weapons

Uses two fields to indicate the current weapons held by the player.

The JSON is in the following format:

"wepA":17,

"wepB":5

Timestamp

Set to the UNIX timestamp of the time when you started your run.

"timestamp":1454012759

Kills

Indicates the number of enemies that the player has killed.

The JSON is in the following format:

"kills":158

Type

This field indicates what is the type of the run.

The JSON is in the following format:

"type": "normal"

The following values are possible: "normal", "daily", "weekly" and "hard".

Ultra

This field indicates the ultra mutation of the player.
 
"ultra" : 0 

No ultra mutation 

"ultra" : 1 or 2 

Which ultra mutation was picked (from left to right). 

Lasthit

This field indicates the ID of the last enemy that hit the player. (If the player's health is 0, then this would indicate what they died to.)

The JSON is in the following format:

"lasthit":7