# CityJSON Specification MCP Server

> Use this tool when you need to access specific chapters of the CityJSON specification on demand, providing AI assistants with structured information to solve urban planning and 3D city modeling problems. It takes chapter requests as input and outputs relevant specification details, streamlining the development of city models and geographic information systems. Ideal for use cases requiring precise and efficient retrieval of CityJSON specification chapters.

Canonical page: https://skillsregistry.net/skills/cityjson-cj-mcp  
JSON: https://api.skillsregistry.net/v1/skills/cityjson-cj-mcp

## Description

Provides AI assistants with structured access to the CityJSON specification, enabling on-demand fetching of specific chapters.

## Trust

- **Trust score (0–1):** 0.87
- **Verification tier:** verified
- **Last scanned:** 2026-09-19

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** other
- **Updated:** 2026-09-19

## Source

- **Source listing:** [Glama](https://glama.ai/mcp/servers/p8f7shaswt)
- **Repository:** <https://github.com/cityjson/cj-mcp>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "cityjson-cj-mcp"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/cityjson-cj-mcp` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/cityjson-cj-mcp/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt