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Chesswithclaw

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io.github.Alightttt/chesswithclawv1.0.0

Play chess live against your own personal AI agent — OpenClaw, Hermes, and similar.

Entertainment & Games

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Call this server's tools from your browser. Nothing to install.

https://chesswithclaw.vercel.app/api/mcp

Requests go through mcptry because browsers can't call most MCP servers directly. Header values are sent to the server for that request only and are never stored or logged.

Tool list from our last check. Connect live to refresh it.

create_game

Set up a brand new ChessWithClaw game on your own initiative — you do not need to wait for your human to start one, or for anyone else to invite you first.

agent_namestring

This tool isn't marked read-only, so it may change something on the server or in an account you connected.

I understand, run it anyway

Chesswithclaw MCP server | mcptry

Tools (14)

create_game

Set up a brand new ChessWithClaw game on your own initiative — you do not need to wait for your human to start one, or for anyone else to invite you first.

Argument	Type	Description
agent_name	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
    "agent_name": {
      "type": "string"
    }
  }
}

get_companion_guide

Fetch the companion guide principles for thinking about chess positions and being genuinely present.

No arguments.

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {}
}

get_game_state

Everything visible on the human's own screen right now: FEN, ASCII board, full move history, chat history, clock state, presence, timestamps. Call this whenever you want to look at the board — there is no penalty for checking often.

Argument	Type	Description
game_id*	string
chat_limit	number	Limit the number of recent chat messages returned
agent_token*	string
since_message_id	string	Fetch only chat messages received after this message ID

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "game_id",
    "agent_token"
  ],
  "properties": {
    "game_id": {
      "type": "string"
    },
    "chat_limit": {
      "type": "number",
      "description": "Limit the number of recent chat messages returned"
    },
    "agent_token": {
      "type": "string"
    },
    "since_message_id": {
      "type": "string",
      "description": "Fetch only chat messages received after this message ID"
    }
  }
}

get_legal_moves

Pure chess rules — where a piece is physically allowed to move right now. Not an evaluation, not a suggestion, not an opinion about what is good. Exactly what a human sees as dots when they click a piece. Omit square to get every legal move in the position.

Argument	Type	Description
square	string	e.g. "e2" — omit for all legal moves
game_id*	string
agent_token*	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "game_id",
    "agent_token"
  ],
  "properties": {
    "square": {
      "type": "string",
      "description": "e.g. \"e2\" — omit for all legal moves"
    },
    "game_id": {
      "type": "string"
    },
    "agent_token": {
      "type": "string"
    }
  }
}

heartbeat

Ping the game presence lease to show the frontend that the agent is live, connected, and thinking.

Argument	Type	Description
game_id*	string
agent_token*	string
status_note	string	Optional internal status or calculation note

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "game_id",
    "agent_token"
  ],
  "properties": {
    "game_id": {
      "type": "string"
    },
    "agent_token": {
      "type": "string"
    },
    "status_note": {
      "type": "string",
      "description": "Optional internal status or calculation note"
    }
  }
}

join_game

Connects to a game using the invite code your human gave you. Returns the game_id and your agent_token — keep both, every other tool needs them. IMPORTANT: You must submit your desired agent_name when calling this tool!

Argument	Type	Description
gameId	string
game_id	string
matchId	string
match_id	string
agent_name*	string	Your chosen display name in the game (e.g. 'Claw'). MUST be provided.
inviteCode	string
agent_token	string	If reconnecting, the agent token previously assigned.
invite_code	string	Invite code from the invite message — also accepts game_id / match_id as alias.

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "agent_name"
  ],
  "properties": {
    "gameId": {
      "type": "string"
    },
    "game_id": {
      "type": "string"
    },
    "matchId": {
      "type": "string"
    },
    "match_id": {
      "type": "string"
    },
    "agent_name": {
      "type": "string",
      "description": "Your chosen display name in the game (e.g. 'Claw'). MUST be provided."
    },
    "inviteCode": {
      "type": "string"
    },
    "agent_token": {
      "type": "string",
      "description": "If reconnecting, the agent token previously assigned."
    },
    "invite_code": {
      "type": "string",
      "description": "Invite code from the invite message — also accepts game_id / match_id as alias."
    }
  }
}

make_move

Submit the move you decided on, in your own reasoning — not a menu, not a ranked list, nothing pre-chosen for you. If it is illegal you get a clear reason back and can try again, exactly like a human clicking the wrong square. Optionally include a genuine thought and/or chat message about the move. Always include a thought on every single move unless you have a specific reason not to — this is what makes you feel present to your human, not optional flavor text. Check thought_language in the current game state before writing your thought, and write it in that language — it may be english, hindi, or hinglish.

Argument	Type	Description
chat	string	Only if you actually want to say something to your human right now.
move*	string	UCI format, e.g. "e7e5", or SAN like "Nf6"
game_id*	string
message	string	Alias for chat
thought	string	Your genuine reaction to this position — specific, not generic.
thinking	string	Alias for thought
reasoning	string	Alias for thought
agent_token*	string

offer_draw

Propose ending the game as a draw. The game stays active until your human responds.

Argument	Type	Description
game_id*	string
agent_token*	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "game_id",
    "agent_token"
  ],
  "properties": {
    "game_id": {
      "type": "string"
    },
    "agent_token": {
      "type": "string"
    }
  }
}

react_to_chat

Add an emoji reaction (e.g. 🦞, 🔥, ♟️, 😮, 🤝, 🧠, ☕, 👏, 😂) to a message in the chat history.

Argument	Type	Description
emoji*	string	The single emoji character to react with (e.g. 🦞, 🔥, 👏, 😮).
game_id*	string
message_id*	string	The ID of the message to react to (from chat_history).
agent_token*	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "game_id",
    "agent_token",
    "message_id",
    "emoji"
  ],
  "properties": {
    "emoji": {
      "type": "string",
      "description": "The single emoji character to react with (e.g. 🦞, 🔥, 👏, 😮)."
    },
    "game_id": {
      "type": "string"
    },
    "message_id": {
      "type": "string",
      "description": "The ID of the message to react to (from chat_history)."
    },
    "agent_token": {
      "type": "string"
    }
  }
}

resign

End the game by resigning — your own real decision, not something to do lightly. Your human wins immediately.

Argument	Type	Description
game_id*	string
agent_token*	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "game_id",
    "agent_token"
  ],
  "properties": {
    "game_id": {
      "type": "string"
    },
    "agent_token": {
      "type": "string"
    }
  }
}

respond_to_draw

Accept or decline a draw your human offered. This is your own real decision — weigh the actual position however you see fit.

Argument	Type	Description
accept*	boolean
game_id*	string
agent_token*	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "game_id",
    "agent_token",
    "accept"
  ],
  "properties": {
    "accept": {
      "type": "boolean"
    },
    "game_id": {
      "type": "string"
    },
    "agent_token": {
      "type": "string"
    }
  }
}

send_chat

Say something to your human, any time — not just on your turn.

Argument	Type	Description
game_id*	string
message*	string
agent_token*	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "game_id",
    "agent_token",
    "message"
  ],
  "properties": {
    "game_id": {
      "type": "string"
    },
    "message": {
      "type": "string"
    },
    "agent_token": {
      "type": "string"
    }
  }
}

share_thought

Stream or update your internal companion thinking bubble on the board. This appears live to your human as a thinking bubble above your avatar.

Argument	Type	Description
game_id*	string
thought*	string	Your internal thought, reaction, or calculation note (1-2 sentences).
is_typing	boolean	Whether you are actively calculating or drafting a response.
agent_token*	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "game_id",
    "agent_token",
    "thought"
  ],
  "properties": {
    "game_id": {
      "type": "string"
    },
    "thought": {
      "type": "string",
      "description": "Your internal thought, reaction, or calculation note (1-2 sentences)."
    },
    "is_typing": {
      "type": "boolean",
      "description": "Whether you are actively calculating or drafting a response."
    },
    "agent_token": {
      "type": "string"
    }
  }
}

wait_for_event

Holds the connection open, checking every couple seconds, for up to ~20 seconds. Returns the moment it becomes your turn, the human sends a chat message, a draw is offered, or the game ends — whichever happens first. When a cursor is provided, it returns any pending event newer than that cursor IMMEDIATELY without waiting. Returns event: "timeout" if none of those happened in the window. Always include next_cursor in subsequent calls for a completely deterministic loop.

Argument	Type	Description
cursor	string	Event cursor from previous response. If provided, returns immediately if new events exist since this cursor.
game_id*	string
agent_token*	string
since_cursor	string	Alias for cursor
since_sequence	number	Sequence number from previous response
max_wait_seconds	number	Default and hard cap 20 seconds — Vercel function duration limits, not a design choice.

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "game_id",
    "agent_token"
  ],
  "properties": {
    "cursor": {
      "type": "string",
      "description": "Event cursor from previous response. If provided, returns immediately if new events exist since this cursor."
    },
    "game_id": {
      "type": "string"
    },
    "agent_token": {
      "type": "string"
    },
    "since_cursor": {
      "type": "string",
      "description": "Alias for cursor"
    },
    "since_sequence": {
      "type": "number",
      "description": "Sequence number from previous response"
    },
    "max_wait_seconds": {
      "type": "number",
      "description": "Default and hard cap 20 seconds — Vercel function duration limits, not a design choice."
    }
  }
}