Praetorium

Public Warhammer 40K rules, datasheets, points and missions; sign in to manage rosters and battles.

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What it can do

    What data it sees

    Do you need an account

    No: the server works without sign-in

    Public Warhammer 40K rules, datasheets, points and missions; sign in to manage rosters and battles.

    How to connect

    How to connect Praetorium to Claude

    The server address to paste into Claude settings:

    https://praetorium.gg/mcp

    1. Open Claude (claude.ai or the desktop app).
    2. Go to Settings → Connectors.
    3. Click Add custom connector.
    4. Paste the server address copied below into Remote MCP server URL and click Add.
    5. In a chat, click + → Connectors and switch the new connector on.

    Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

    Authorization

    After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

    How to connect Praetorium to ChatGPT

    The server address to paste into ChatGPT settings:

    https://praetorium.gg/mcp

    1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
    2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
    3. Open Settings → Connectors and click Create.
    4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
    5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
    6. In a new chat open + → Apps/Connectors and enable the connector.

    OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

    Authorization

    On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

    How to connect Praetorium to Cursor

    The server address to paste into Cursor settings:

    https://praetorium.gg/mcp

    Fastest: click Open in Cursor below and confirm the prompt.

    Manually:

    1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
    2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
    3. Save the file. The server appears in the MCP list; authorize it there if asked.

    Authorization

    If the service needs sign-in, an authorize button appears next to the server in the MCP list.

    Server tool list (15)

    Raw names from tools/list. Only developers need these.

    list_my_rostersLists the rosters saved to the signed-in Praetorium account. Requires mcp:read.
    get_my_rosterReturns the saved choices for one roster owned by the signed-in player. Requires mcp:read.
    list_my_battlesLists up to 25 battles with a cursor for the next page. Requires mcp:read.
    get_my_battleReturns the current seated view of a battle for the signed-in player. Requires mcp:read.
    save_rosterSaves a complete roster. Pass its id to edit an owned roster; omit id to create one. limit is the battle size (1000, 2000 or 3000 points, or 600 for King of the Colosseum), which sets detachment points, enhancement and unit limits. pointsBudget optionally replaces only its points total (500 to 10000, not King of the Colosseum); omit it to keep a saved budget, or send null for the standard total. Requires mcp:write.
    set_roster_visibilityChanges the visibility of an owned roster. Requires mcp:write.
    create_battleCreates a battle with named player seats, using the same rules as the site. Requires mcp:write.
    submit_battle_actionAppends a legal battle command only when expectedSeq matches the current log. Requires mcp:write.
    search_referenceSearches the verified mission, rules, detachment, and datasheet text used by Praetorium. Returns bounded excerpts with canonical URLs, source revisions, and attribution.
    get_referenceReads the complete bounded document returned by search_reference, with its source location, revisions, and attribution.
    get_reference_recordReturns the source-faithful structured record behind a search result, including mission cards, deployments, terrain geometry, detachments, and datasheets.
    list_factionsLists the factions that can be used to narrow reference searches.
    list_referenceDiscovers available factions, mission packs, rule documents, reference kinds, and active source revisions.
    list_unitsReturns every pickable unit in one bounded response with unit-size costs, composition, attachment relationships, roster limits, roles, keywords, and links. Include a detachment to receive its complete rules, enhancements, upgrades, and stratagems without opening every unit page.
    simulate_combatRuns Praetorium's exact combat simulator for one attacking unit, with any attached leaders, against one defending unit at full strength: shooting, melee, and shooting followed by melee. Returns expected models destroyed, expected wounds lost, the chance to destroy the unit, cumulative odds, weapons used, the rule and weapon-mode choices each side can change, datasheet citations, and a simulator link. Passive datasheet rules apply by default; stratagems and conditional rules stay off until chosen. Unsupported mechanics are refused or listed under notCalculated rather than approximated. Like the standalone simulator page, it uses default loadouts and no detachment; unit sizes and attachments must be legal.