Laplace’s Mini World

Official3 tools

by Keith-CY

Interactive 3D science models in Chinese and English, found and shown live in the chat.

io.github.Keith-CY/laplace-mini-world-mcp Model Context Protocol (MCP) Server

This MCP server provides interactive 3D science models presented in both Chinese and English, displayed live within the chat. It is identified by the slug io-github-keith-cy-laplace-mini-world-mcp and is described as enabling in-chat model interaction rather than offline assets.

🛠️ Key Features

Interactive 3D science models
Chinese and English language support
Live model display in chat

🚀 Use Cases

Exploring 3D science concepts interactively
Using the models in multilingual (Chinese/English) chat contexts

⚡ Developer Benefits

Chat-integrated presentation of interactive 3D content
Clear bilingual labeling (Chinese and English) for conversational workflows

⚠️ Limitations

No additional capabilities, tool count, or API/tooling details are provided in the available server data

Topics

3deducationinteractivemcpmodel-context-protocolphysics

Captured live from the server via tools/list.

search_models

Use this when the user asks how something works or why something happens in physics, engineering, AI, biology and medicine, earth and space science or mathematics, or asks to see or try a mechanism: e.g. “why do we have seasons”, “how does a jet engine work”, “潮汐是怎么形成的”, “Transformer 的注意力是什么”. Searches the interactive 3D models (“plates”) on world.lapla.si: first an index of the questions each plate answers (Chinese and English), then titles and topics. Returns the best plates, each with its slug, the chapter that answers the question and sometimes lab settings, to pass to show_model. Returns no results when no plate covers the question. Not for news, prices, homework calculations, or medical, legal or financial advice.

Parameters3

query	string	required	The user’s question in their own words, in any language (e.g. “why is the sky blue”, “光刻机是怎么工作的”), or a topic (“black hole”, “黑洞”).
lang	string	optional	Language of the results: zh (Chinese) or en (English). Default: the query’s language.
limit	integer	optional	How many plates to return at most.

Raw schema

{
  "type": "object",
  "properties": {
    "query": {
      "type": "string",
      "description": "The user’s question in their own words, in any language (e.g. “why is the sky blue”, “光刻机是怎么工作的”), or a topic (“black hole”, “黑洞”).",
      "minLength": 1,
      "maxLength": 200
    },
    "lang": {
      "type": "string",
      "enum": [
        "zh",
        "en"
      ],
      "description": "Language of the results: zh (Chinese) or en (English). Default: the query’s language."
    },
    "limit": {
      "type": "integer",
      "minimum": 1,
      "maximum": 10,
      "default": 5,
      "description": "How many plates to return at most."
    }
  },
  "required": [
    "query"
  ],
  "additionalProperties": false
}

show_model

Shows one interactive 3D model from world.lapla.si in the conversation, opening at the chapter that answers the user’s question; the user can turn it, step through its chapters and try its lab. Use it after search_models with the slug and chapter (and params) it returned, or when the user names a plate. Also returns a short text summary and the plate’s link, for clients that show no UI.

Parameters5

slug	string	required	The plate id from search_models (e.g. "seasons").
chapter	string	optional	The chapter id to open at, from search_models or list_chapters (e.g. "tilt"). Default: the cover.
lang	string	optional	zh (Chinese) or en (English).
lab	boolean	optional	Open the lab panel.
params	object	optional	Lab settings by id, from search_models or list_chapters: a number for a slider, an option id for a choice, true/false for a toggle.

Raw schema

{
  "type": "object",
  "properties": {
    "slug": {
      "type": "string",
      "description": "The plate id from search_models (e.g. \"seasons\").",
      "maxLength": 64
    },
    "chapter": {
      "type": "string",
      "description": "The chapter id to open at, from search_models or list_chapters (e.g. \"tilt\"). Default: the cover.",
      "maxLength": 64
    },
    "lang": {
      "type": "string",
      "enum": [
        "zh",
        "en"
      ],
      "description": "zh (Chinese) or en (English)."
    },
    "lab": {
      "type": "boolean",
      "description": "Open the lab panel."
    },
    "params": {
      "type": "object",
      "description": "Lab settings by id, from search_models or list_chapters: a number for a slider, an option id for a choice, true/false for a toggle.",
      "additionalProperties": {
        "type": [
          "number",
          "string",
          "boolean"
        ]
      }
    }
  },
  "required": [
    "slug"
  ],
  "additionalProperties": false
}

list_chapters

Lists one plate’s chapters (ids and titles) and the lab settings it accepts (ids, ranges, options), for show_model. Use it when the user wants another part of a plate than the one search_models gave, or wants to set the lab.

Parameters2

slug	string	required	The plate id from search_models (e.g. "tides").
lang	string	optional	zh (Chinese) or en (English).

Raw schema

{
  "type": "object",
  "properties": {
    "slug": {
      "type": "string",
      "description": "The plate id from search_models (e.g. \"tides\").",
      "maxLength": 64
    },
    "lang": {
      "type": "string",
      "enum": [
        "zh",
        "en"
      ],
      "description": "zh (Chinese) or en (English)."
    }
  },
  "required": [
    "slug"
  ],
  "additionalProperties": false
}

README.md8 KBView on GitHub

Laplace’s Mini World

Laplace’s Mini World — MCP server

English · 中文

Live, interactive 3D science models from world.lapla.si, right inside ChatGPT, Claude, Cursor and any other MCP client.

Ask “why do we have seasons?”, “show me how a jet engine works” or “用迷你世界给我看看黑洞”: the assistant finds the right model and puts it in the conversation. Turn it, step through its chapters, and change things in its laboratory, such as the tilt of the Earth’s axis.

code

https://world.lapla.si/mcp

No account, no API key, no sign-in. Read-only. Streamable HTTP.

The turbofan model inside a ChatGPT conversation

What the models are

world.lapla.si (拉普拉斯的迷你世界, Laplace’s Mini World) is a set of over 100 “plates”: each one a working 3D model in the browser, a short illustrated essay with its sources, and a laboratory to try things in. Every plate says what it simplifies. Chinese and English.

Layer	Halls (plates)
Nature	Space (10) · Earth & Sky (13) · Matter, Light & Sound (17) · Life & Medicine (10)
Technology	Classic Machines (15) · Energy, Flight & Sensing (8) · Chips & Information (6) · AI (4)
Ideas	Mathematics (22)

Some of them: the seasons, tides, a solar eclipse, a black hole, the Orionids, hurricanes, tsunamis, rainbows, a turbofan, a tokamak, EUV lithography, the Antikythera mechanism, Enigma, a perceptron, attention in a transformer, CRISPR, Fourier series, the Lorenz attractor, the Hopf fibration. The full list is in /models.json and /llms.txt.

Tools

All three tools are read-only (readOnlyHint: true, destructiveHint: false, openWorldHint: false, idempotentHint: true).

Tool	Input	What it returns
`search_models`	`query`, `lang?` (`zh`/`en`), `limit?` (1–10)	The best plates for a topic, with ids and summaries
`show_model`	`slug`, `chapter?`, `lang?`, `lab?`, `params?`	The live model as an MCP Apps UI, plus a text summary and the plate’s link (text-only clients still get something useful)
`list_chapters`	`slug`, `lang?`	A plate’s chapters and its lab settings (ids, ranges, options)

The server speaks MCP 2026-07-28 (stateless, server/discover) and the earlier handshake versions (2025-11-25, 2025-06-18, 2025-03-26). The interactive UI is a ui:// resource with mimeType text/html;profile=mcp-app.

Connect it

ChatGPT

On chatgpt.com: Settings → Apps (Plugins) → Add → custom MCP server. Depending on your plan, this may sit under developer mode.
URL: https://world.lapla.si/mcp. Authentication: None.
Ask: “Use Laplace’s Mini World to show me why we have seasons.”

Claude (claude.ai, Desktop, mobile)

Customize → Connectors → Add custom connector. Custom connectors work on every plan, including Free (one connector).
Name: Laplace’s Mini World (or 拉普拉斯的迷你世界). URL: https://world.lapla.si/mcp. No sign-in.
Ask: “用拉普拉斯的迷你世界给我看看涡扇发动机。”

The connector in Claude’s settings

Claude Code

claude mcp add --transport http laplace-mini-world https://world.lapla.si/mcp

Cursor

~/.cursor/mcp.json (or .cursor/mcp.json in a project):

json

{
  "mcpServers": {
    "laplace-mini-world": { "url": "https://world.lapla.si/mcp" }
  }
}

VS Code (GitHub Copilot)

.vscode/mcp.json:

json

{
  "servers": {
    "laplace-mini-world": { "type": "http", "url": "https://world.lapla.si/mcp" }
  }
}

Gemini CLI

~/.gemini/settings.json:

json

{ "mcpServers": { "laplace-mini-world": { "httpUrl": "https://world.lapla.si/mcp" } } }

Gemini doesn’t render MCP Apps UI, so the tools answer in text with the plate’s link.

Any other client

Clients that speak Streamable HTTP: point them at https://world.lapla.si/mcp.
Clients that only run local (stdio) servers: bridge with mcp-remote:

json

{
  "mcpServers": {
    "laplace-mini-world": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://world.lapla.si/mcp"]
    }
  }
}

Plain HTTP: see examples/curl.sh.

curl -s https://world.lapla.si/mcp \
  -H 'Content-Type: application/json' \
  -H 'Accept: application/json, text/event-stream' \
  -H 'MCP-Protocol-Version: 2025-06-18' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"search_models","arguments":{"query":"black hole","lang":"en"}}}'

Screenshots


Turbofan, cover	Turbofan, a chapter
The turbofan in ChatGPT, asked in Chinese	Stepping to the next chapter

The seasons model in the conversation and the turbofan full screen The seasons model in English, with the turbofan opened full screen.

The tides model opened on its laboratory, with the chapter list The tides model opened straight on its laboratory, and its chapters listed by list_chapters.

The catalog, embed pages and oEmbed

The same data the server uses is public.

`models.json`

https://world.lapla.si/models.json lists every plate: slug, plate number, title, kicker, summary and description in zh and en, hall and layer, plate and embed URLs, card picture, chapters (with ids), and lab settings (ids, kinds, ranges or options, defaults). examples/models.mjs searches it from Node:

node examples/models.mjs tides

/llms.txt and /llms-full.txt follow llmstxt.org.

Embed pages

Every model has a page that is just the stage, sized to its frame:

code

https://world.lapla.si/embed/{lang}/{slug}/

Parameter	Effect
`chapter=<id>`	Open on that chapter (default: the cover)
`lab=1`	Open the laboratory
`theme=light` / `dark`	Match the host’s theme (default: the viewer’s system setting)
`ui=0`	The model alone, with only the link back
`<setting id>=<value>`	A lab setting: a slider’s number, a choice’s option id, a toggle `1`/`0`, `play=1`

Example: https://world.lapla.si/embed/en/seasons/?chapter=tilt&theme=dark

Where they can be framed. For now the embed pages may only be framed by world.lapla.si and the AI chat hosts (ChatGPT, Claude). On other sites, link to the plate (https://world.lapla.si/{lang}/{slug}/) instead; if you would like to embed a model on your own site or course page, write to contact@lapla.si.

oEmbed

code

https://world.lapla.si/oembed?url=https://world.lapla.si/en/seasons/&format=json

Returns a rich answer with the embed iframe and the card picture. Plate pages carry the oEmbed discovery <link>.

Privacy

The server stores and logs nothing about you: no account, no cookies, no sessions. Tool inputs (a search query, a plate id, a chapter id, lab settings) are used only to build the answer. The models shown in a chat run no analytics. See the site’s privacy page.

MCP Registry

TODO: server.json for the MCP Registry will be added here.

Licence

The models, essays, pictures and screenshots: CC BY-NC 4.0, © Laplace’s Mini World (world.lapla.si). Data sets keep their own licences, named on each plate.
The example code and configuration snippets in this repository (examples/ and the code blocks in the READMEs): MIT.

The server’s source is not in this repository.

Contact

contact@lapla.si · world.lapla.si

Install

Tools (3)

search_modelsshow_modellist_chapters

Remote endpoint

Streamable HTTP

Hosted server - connect over the network, no local install.

url

https://world.lapla.si/mcp

Add to VS Code Add to Cursor

claude_desktop_config.json

json

{
  "mcpServers": {
    "laplace-mini-world-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://world.lapla.si/mcp"
      ]
    }
  }
}

Desktop config is stdio-only; this bridges via mcp-remote. Native remote: Settings > Connectors.

io.github.Keith-CY/laplace-mini-world-mcp Model Context Protocol (MCP) Server

🛠️ Key Features

🚀 Use Cases

⚡ Developer Benefits

⚠️ Limitations

Topics

search_models

show_model

list_chapters

Laplace’s Mini World — MCP server

What the models are

Tools

Connect it

ChatGPT

Claude (claude.ai, Desktop, mobile)

Claude Code

Cursor

VS Code (GitHub Copilot)

Gemini CLI

Any other client

Screenshots

The catalog, embed pages and oEmbed

models.json

Embed pages

oEmbed

Privacy

MCP Registry

Licence

Contact

Install

Remote endpoint

Related servers

`models.json`