ARCclaude

An open-source MCP server that gives AI assistants complete access to the ArcGIS Pro ecosystem.

ARCclaude connects Large Language Models — Claude, GPT, Gemini, local models, or anything that speaks MCP — to ArcGIS Pro through ArcPy. It is not a chatbot that answers GIS questions: it's a copilot that does the work — running geoprocessing tools, writing and debugging ArcPy, inspecting projects and data, automating maps, and building complete analysis pipelines from natural language.

"Buffer every school in the city by 500 m, clip to the district boundary, and tell me how many parcels intersect" — and it actually happens, in your local ArcGIS Pro install, with full messages and outputs reported back.

How it works

Claude / GPT / any MCP client
        │  MCP over stdio
        ▼
ARCclaude server (lightweight Python, managed by uv)
        │  JSON-lines over pipes
        ▼
ArcPy worker — persistent session on ArcGIS Pro's own Python
        ▼
ArcGIS Pro  (all licensed tools & extensions)

The mental model (read this first)

There is no chat window inside ArcGIS Pro, and you never "open" ARCclaude. The relationship is flipped:

1. You talk to your AI app (Claude Desktop, Claude Code, Cursor, …) in plain English: "Create a shapefile of the 5 largest lakes in Ontario with name and area fields."

2. The AI drives ArcGIS Pro's engine through ARCclaude, in the background — Pro doesn't even need to be running.

3. You open the results in Pro like any other data: Map → Add Data → your new shapefile/geodatabase is just there, fields and all.

Pro can be open at the same time; just avoid pointing both Pro and the AI at the same geodatabase simultaneously (file locks). An in-Pro chat panel is on the roadmap (Phase 3).

Two design decisions make this robust:

1. Esri's Python environment is never modified. The worker script uses only the standard library + arcpy, so nothing is ever installed into arcgispro-py3. No env cloning, no admin rights, upgrade-safe.

2. The arcpy session is persistent. The slow arcpy import (~20–60 s license checkout) is paid once; after that every call is fast, and variables persist across calls like a REPL — the AI can build up state over a long workflow.

Related MCP server: ArcGIS Pro Bridge MCP Server

Requirements

• Windows with ArcGIS Pro 3.x installed and licensed

• uv (installs its own Python — you don't need one)

Install (everyone) — one command, then just talk to Claude

You do not need this repo, git, or any coding. Paste one line into PowerShell:

irm https://raw.githubusercontent.com/thaparSAAB14/ARCclaude/main/install.ps1 | iex

It checks ArcGIS Pro, installs what's needed, and auto-connects ARCclaude to Claude Desktop and Claude Code. Then open Claude Desktop (or Claude Code) and just talk: "make a shapefile of the 3 biggest parks near me." That's the whole product — Claude is the interface; ARCclaude works invisibly underneath. Re-running the same line updates you to the latest version.

Note: Claude must run on the same PC as ArcGIS Pro (Claude Desktop or Claude Code). The claude.ai website in a browser cannot reach software on your machine — a hosted/remote mode is on the roadmap.

Manual install (nerds)

git clone https://github.com/thaparSAAB14/ARCclaude.git
cd ARCclaude
uv sync

New to this? The complete setup guide walks through everything from a blank machine, including client configs and troubleshooting.

Claude Code

The repo ships a project-scoped .mcp.json, so opening this folder in Claude Code just works. To register it globally instead:

claude mcp add arcclaude --scope user -- uv --directory C:\path\to\arcclaude run arcclaude

Claude Desktop

Add to %APPDATA%\Claude\claude_desktop_config.json:

{
  "mcpServers": {
    "arcclaude": {
      "command": "uv",
      "args": ["--directory", "C:\\path\\to\\arcclaude", "run", "arcclaude"]
    }
  }
}

Any other MCP-capable client (Cursor, Windsurf, open-source agents, GPT/Gemini via MCP adapters) configures the same way: uv --directory <repo> run arcclaude over stdio.

Tools

Because discovery is dynamic (arcpy.ListTools), newly installed extensions and custom toolboxes are exposed automatically — no code changes needed.

No Claude subscription? The nerd door (terminal chat)

ARCclaude also ships a standalone agentic CLI (bring your own API key — Anthropic, OpenAI, Gemini-compat, Groq, or a free local model via Ollama):

uv run arcclaude login    # one-time: pick provider, paste key
uv run arcclaude chat     # Codex-style AI GIS terminal

Works in any Windows terminal, including ArcGIS Pro's own Python Command Prompt.

Cowork mode — live changes in the OPEN ArcGIS Pro

An open project is locked to outside processes, so ARCclaude ships a Live Link: run uv run arcclaude live, paste the printed one-liner into Pro's Python window (View ribbon → Python), and the AI can now drive the session you're looking at — add layers to the current map, restyle, zoom, save — via the pro_live_execute tool.

Cowork rules (experimental feature): while active, Pro's Python window is busy — don't type more commands into it, and don't close Pro to end it. Stop from any terminal with uv run arcclaude live stop; it also auto-exits after 10 minutes with no commands. See PRODUCT.md for the architecture — the Phase-3 add-in replaces this with proper in-app threading.

Security model

arcpy_execute runs arbitrary Python code on your machine with your permissions. That is the point — it's what makes the copilot universal — but understand it:

• Run it only with MCP clients that show you tool calls and let you approve them (Claude Code and Claude Desktop both do).

• The worker inherits your ArcGIS license and file access; it can edit and delete data you can.

• Never expose the server over a network transport without adding authentication.

Configuration

Project documents

• Setup guide — complete walkthrough: install, client configs, troubleshooting

• Security & privacy — data flow, offline mode, network surface (read this, IT folks)

• Comparison — vs. Esri's Pro Assistant, community MCP servers, and Kue

• Vision — the full scope this project is building toward

• Architecture — design decisions and worker protocol

• Roadmap — phased plan from this MVP to the full vision

• Contributing

Status

Alpha (v0.5.0). The core execution engine works end-to-end. The surface area of the vision — Pro SDK add-in for live session control, ArcGIS Online/Enterprise, open-data connectors — is roadmap. Issues and PRs welcome.

License

Apache-2.0. ArcGIS, ArcPy and ArcGIS Pro are trademarks of Esri. This is an independent community project, not affiliated with or endorsed by Esri.