Slot Machine Skill

Overview

Slot Machine Simulator works by generating random reel results using weighted probabilities for different symbols, calculating payouts based on symbol matches and bet amounts, and tracking detailed statistics across multiple spins.

Live Test Slot Machine Skill Skill →

The tool

Once your client is connected to the VerveKit server, this appears in its tool list as SlotMachineSkill. It is read-only and open-world — it fetches and never mutates anything on your side — so most clients call it without asking you to confirm.

Tool call

{
  "name": "SlotMachineSkill",
  "arguments": {}
}

Connecting

One server URL covers every skill in the catalog, including this one. Authorization is OAuth: the client opens a browser once, and there is no key to paste into a config file.

{
  "mcpServers": {
    "vervekit": {
      "url": "https://api.vervekit.com/v1/mcp"
    }
  }
}

Per-client setup — Claude, Cursor, VS Code, ChatGPT — is on the MCP setup page.

Arguments

These are the properties on the tool's inputSchema, so a well-behaved client validates them before the call is made. Premium arguments are accepted on every plan but only take effect on plans that include them.

Argument	Type	Description
`spins`Optional	integer	Number of spins to simulate default 1 · range 1–5
`reels`Optional	integer	Number of reels default 3 · range 3–5
`bet`Optional	number	Bet amount per spin default 1 · range 0–1000

What the model gets back

The result carries a structuredContent object matching the tool's declared outputSchema, so a client reads fields without parsing prose. status is "ok" and error is null on success; a null field means the value was not available for that input, not that the call failed.

Result

{
  "status": "ok",
  "error": null,
  "data": {
    "total_spins": 5,
    "num_reels": 3,
    "bet_per_spin": 1,
    "spins": [
      {
        "spin_number": 1,
        "reels": [
          {
            "symbol": "🍋",
            "name": "Lemon"
          },
          {
            "symbol": "🍒",
            "name": "Cherry"
          },
          {
            "symbol": "🍒",
            "name": "Cherry"
          }
        ],
        "bet": 1,
        "payout": 0,
        "win_type": "none",
        "is_win": false
      },
      {
        "spin_number": 2,
        "reels": [
          {
            "symbol": "⭐",
            "name": "Star"
          },
          {
            "symbol": "🍋",
            "name": "Lemon"
          },
          {
            "symbol": "⭐",
            "name": "Star"
          }
        ],
        "bet": 1,
        "payout": 0,
        "win_type": "none",
        "is_win": false
      },
      {
        "spin_number": 3,
        "reels": [
          {
            "symbol": "🍊",
            "name": "Orange"
          },
          {
            "symbol": "🍇",
            "name": "Grape"
          },
          {
            "symbol": "🍋",
            "name": "Lemon"
          }
        ],
        "bet": 1,
        "payout": 0,
        "win_type": "none",
        "is_win": false
      },
      {
        "spin_number": 4,
        "reels": [
          {
            "symbol": "🍒",
            "name": "Cherry"
          },
          {
            "symbol": "⭐",
            "name": "Star"
          },
          {
            "symbol": "🔔",
            "name": "Bell"
          }
        ],
        "bet": 1,
        "payout": 0,
        "win_type": "none",
        "is_win": false
      },
      {
        "spin_number": 5,
        "reels": [
          {
            "symbol": "🍒",
            "name": "Cherry"
          },
          {
            "symbol": "🍒",
            "name": "Cherry"
          },
          {
            "symbol": "7️⃣",
            "name": "Seven"
          }
        ],
        "bet": 1,
        "payout": 0.5,
        "win_type": "small",
        "is_win": true
      }
    ],
    "total_bet": 5,
    "total_winnings": 0.5,
    "net_profit": -4.5,
    "wins": 1,
    "losses": 4,
    "win_percentage": 20,
    "available_symbols": [
      {
        "symbol": "🍒",
        "name": "Cherry",
        "payout_multiplier": 2
      },
      {
        "symbol": "🍋",
        "name": "Lemon",
        "payout_multiplier": 3
      },
      {
        "symbol": "🍊",
        "name": "Orange",
        "payout_multiplier": 5
      },
      {
        "symbol": "🍇",
        "name": "Grape",
        "payout_multiplier": 10
      },
      {
        "symbol": "🔔",
        "name": "Bell",
        "payout_multiplier": 20
      },
      {
        "symbol": "⭐",
        "name": "Star",
        "payout_multiplier": 50
      },
      {
        "symbol": "💎",
        "name": "Diamond",
        "payout_multiplier": 100
      },
      {
        "symbol": "7️⃣",
        "name": "Seven",
        "payout_multiplier": 200
      }
    ]
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Field	Type	Example	Description
`total_spins`	number	`5`	Total number of spins simulated in session
`num_reels`	number	`3`	Number of reels used per spin
`bet_per_spin`	number	`1`	Bet amount placed per individual spin
`spins`	array[5]		Array containing detailed information for each spin
`spins.0.spin_number`	number	`1`	Sequential number identifying this spin
`spins.0.reels`	array[3]		Array of reel results for this spin
`spins.0.reels.0.symbol`	string	`🍋`	Emoji symbol displayed on the reel
`spins.0.reels.0.name`	string	`Lemon`	Human-readable name of reel symbol
`spins.0.bet`	number	`1`	Bet amount wagered for this spin
`spins.0.payout`Premium	number	`0`	Monetary payout amount won from spin
`spins.0.win_type`Premium	string	`none`	Classification of win result for spin
`spins.0.is_win`Premium	boolean	`false`	Whether spin resulted in winning combination
`total_bet`	number	`5`	Total amount wagered across all spins
`total_winnings`Premium	number	`0.5`	Total monetary winnings from all spins
`net_profit`Premium	number	`-4.5`	Calculated profit or loss after all spins
`wins`Premium	number	`1`	Count of successful winning spins
`losses`Premium	number	`4`	Count of losing spins in session
`win_percentage`Premium	number	`20`	Percentage of spins that resulted in wins
`available_symbols`	array[8]		Array of all possible symbols used
`available_symbols.0.symbol`	string	`🍒`	Emoji symbol available in slot machine
`available_symbols.0.name`	string	`Cherry`	Name of the available symbol
`available_symbols.0.payout_multiplier`Premium	number	`2`	Payout multiplier for symbol matches

Failure modes

Errors come back as tool errors carrying a sentence the model can act on, not a bare status code. Error handling covers the full list.

Status	What it means
`400` / `422`	The arguments did not validate. The message names the offending one.
`401`	The OAuth session is invalid or expired — reconnect the server.
`403`	Blocked by a key restriction or an IP allow-list. Never a bad identity.
`404`	This skill is not part of VerveKit. Check the catalog.
`429`	Out of credits, or a brief rate limit. The message tells them apart.

A call costs 2 credits each time the tool actually runs; a model that reasons about the tool without calling it costs nothing.

Use cases

Game Development: Implement slot machine mechanics in casino games and gambling applications
Probability Analysis: Analyze slot machine probabilities and expected values for educational purposes
Entertainment: Provide safe, simulated slot machine experience without real money gambling
Testing: Test slot machine algorithms and payout structures for game design and balancing

Other ways to use Slot Machine Skill

Set up Slot Machine Skill on VerveKit, or reach the same source a different way. Your VerveKit account and credits work on all of them — one key, one balance.

Call it as a REST APIOne HTTPS endpoint and an x-api-key header, with SDKs for Node, Python and .NET.APIVerve →Reference →