Dice Roller Skill

Overview

Dice Roller works by parsing dice notation (e.g., 3d6+5), simulating random dice rolls, and calculating totals with modifiers. Returns individual roll results, statistics, and theoretical probability ranges.

Live Test Dice Roller Skill Skill →

The tool

Once your client is connected to the VerveKit server, this appears in its tool list as DiceRollerSkill. 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": "DiceRollerSkill",
  "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
`dice`Optional	string	Dice notation in XdY format (e.g., 3d6, 2d20, default: 1d6) default 1d6 · length 0–20
`modifier`Optional	integer	Modifier to add to the total (can be negative)

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": {
    "dice_notation": "3d6",
    "num_dice": 3,
    "num_sides": 6,
    "modifier": 5,
    "rolls": [
      6,
      4,
      4
    ],
    "total": 14,
    "total_with_modifier": 19,
    "min_roll": 4,
    "max_roll": 6,
    "average_roll": 4.67,
    "theoretical_min": 3,
    "theoretical_max": 18,
    "theoretical_average": 10.5,
    "expression": "3d6+5"
  }
}

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
`dice_notation`	string	`3d6`	The dice notation used for this roll request
`num_dice`	number	`3`	Total count of individual dice rolled
`num_sides`	number	`6`	Number of sides on each die rolled
`modifier`	number	`5`	Modifier value added to final total
`rolls`	array	`[6,4,4]`	Array containing individual result values for each die
`total`	number	`14`	Sum of all dice rolls before modifier applied
`total_with_modifier`Premium	number	`19`	Final total after applying the modifier value
`min_roll`Premium	number	`4`	Lowest individual die value in this roll
`max_roll`Premium	number	`6`	Highest individual die value in this roll
`average_roll`Premium	number	`4.67`	Calculated mean value of all individual rolls
`theoretical_min`Premium	number	`3`	Lowest possible sum without any modifiers applied
`theoretical_max`Premium	number	`18`	Highest possible sum without any modifiers applied
`theoretical_average`Premium	number	`10.5`	Expected mean value based on probability distribution
`expression`	string	`3d6+5`	Complete expression including dice notation and modifier

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

RPG Gaming: Roll dice for tabletop RPGs, D&D sessions, and role-playing game mechanics
Game Development: Implement dice rolling mechanics in digital games and gaming applications
Probability: Demonstrate probability concepts and dice statistics for educational purposes
Simulations: Generate random numbers with dice distributions for simulations and testing

Other ways to use Dice Roller Skill

Set up Dice Roller 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 →