Online Tic-Tac-Toe

The /tic-tac-toe endpoint allows playing and storing an online Tic-Tac-Toe game. Games are stored for 1 hour and support both public and private modes.

POST/v5/tic-tac-toe

Parameters

Parameter	Required	Description
username	Yes	The username making the move
move	Yes	The move played in row-column format (e.g., 1-1, 2-2, 3-3)
session	Yes	The user's session identifier
game	Yes	The game identifier for connection. If the game does not exist, it will be created

Move Format

The board is a 3x3 grid with positions numbered as follows:

1-1 | 1-2 | 1-3
----|-----|----
2-1 | 2-2 | 2-3
----|-----|----
3-1 | 3-2 | 3-3

Code Examples

curl -X POST \
  -H "Content-Type: application/json" \
  -d '{
    "username": "User1",
    "move": "2-2",
    "session": "abc123",
    "game": "VWXYZ"
  }' \
  "https://api.sylvain.sh/v5/tic-tac-toe"

Response Fields

Field	Type	Description
message	string	Status message about the move
winner	string|null	Username of the winner (if game is over)
loser	string|null	Username of the loser (if game is over)
tie	boolean	Whether the game ended in a tie

Error Responses

Error	Description
Global rate limit exceeded.	Global API rate limit reached
You have exceeded the limit of X requests per hour.	Hourly IP/token limit reached
Rate limit exceeded. Try again in X seconds.	Per-user short-window limit
Invalid move. Please provide a valid move (e.g., 1-1, 2-2, 3-3).	Invalid move format
Game is full, you can only watch.	Game already has two players
Please wait for the other player to make a move.	Not your turn
Move already made. Please choose a different move.	Cell already occupied
Session ID mismatch	Session doesn't match the player

Try It

POSThttps://api.sylvain.sh/v5/tic-tac-toe

username*

move*

session*

game*

Error Handling

If parameters are missing or invalid, the API will return an error:

Error Message	Description
Please provide a username (?username={username})	The username parameter is missing
Please provide a valid move (&move={move})	The move parameter is missing or invalid
Please provide a valid session ID (&session={ID})	The session parameter is missing or invalid
Please provide a valid game ID (&game={ID})	The game parameter is missing or invalid

When a game is over, the request will return the winner and loser names, as well as whether there is a tie.

Related Endpoints

• POST /v5/tic-tac-toe/fetch - Retrieve current game information
• POST /v5/tic-tac-toe/list - List all public games
• PATCH /v5/tic-tac-toe/:game - Play a move
• DELETE /v5/tic-tac-toe/:game - Forfeit a game