Play D&D with Claude in Foundry VTT.

Can Claude run your Foundry game?

Yes. Claude drives Familiar, the Foundry module that puts an AI on the dungeon master's side of the table. You ask in plain language and it acts in your world: it rolls initiative, plays the monsters, looks up a rule, voices an NPC, and keeps a record of the campaign. You stay the player.

The part that matters for any AI is what you feed it. Claude does not invent your campaign. You import a published adventure, the maps someone painted and the NPCs someone wrote, and Claude reads that work and runs the table on it, from a single scene to a whole campaign. The story stays the one you brought.

Claude runs the adventure you imported. It does not improvise a plot from nothing, and that is the line between Familiar and a weekend AI-DM app.

• New here? Start with adding AI to FoundryInstall Familiar and connect your first model.

Connecting Claude to Foundry

Claude is the most direct of the three big assistants to connect, because it ships its own MCP clients. Claude Desktop and Claude Code both speak the Model Context Protocol, so neither needs a separate agent app in between. You add Familiar as a connector, and Claude can see your table.

Familiar's in-app wizard writes the config for you, secret included, so you paste rather than hand-edit JSON. An Anthropic Pro, Max, or Team plan is what exposes the connector. The click-by-click for each client lives in the connect guide, so this page does not restate it.

• Claude Desktop: add Familiar as a connector and let the wizard write the config.
• Claude Code: one command adds Familiar to your user scope.

• Connect over MCP: the step-by-stepPer-client setup for Claude Desktop and Claude Code.

Playing D&D with Claude

With Claude connected, you play by talking to it. Ask it to set the scene, run the next fight, or remind you what the innkeeper knew. It reads the situation, calls the Familiar tools, and your Foundry canvas keeps up: the map, the conditions, and the open journal all move as you talk.

Familiar keeps the damage, the conditions, and the dice in code Claude cannot reach, so the maths never bends; what Claude adds is the narration and the rulings.

On a direct Anthropic key, Familiar hands you the full reasoning dial, from off to maximum, so you spend more thinking on a tangled ruling and less on a quick lookup. Which model to pick, and how hard to let it think, is its own guide.

• Combat & AI
• Journals & Notes

• Choosing an AI model, and how hard it thinksTiers, the Thinking dial, and where the model shows up.

Connect Claude and play

Install Familiar in Foundry, add Claude as a connector or paste an Anthropic key, and import the first chapter of a published adventure you own. That is enough to run a session and see how it feels.

• Install Familiar in Foundry
• Connect Claude over MCP
• MCP vs API: which to choose
• Questions? Ask in the Discord