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AgentSUMO

An Agentic Framework for Interactive Simulation Scenario Generation in SUMO via Large Language Models

<img src="assets/hero_overview.png" alt="AgentSUMO overview" width="850"/>

Documentation · Installation · Tools · Schema · Tutorials

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Overview

AgentSUMO lets non-expert stakeholders design, execute, and analyze SUMO traffic simulations through natural-language interaction. The Planner Agent translates abstract policy questions into executable simulation plans, drives them via the Model Context Protocol (MCP), and surfaces results through a web dashboard.

• Conversational scenario design — describe a policy question, get a runnable simulation
• Policy experiments — road closures, lane reductions, signal optimization, demand changes
• Cross-scenario analysis — SQL-based comparison across runs, with auto-generated HTML reports
• Web dashboard — geospatial visualization, time-series charts, and trip replay

Demo

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<img src="assets/demo_web_interface.png" alt="Web interface" width="800"/>

Web interface: conversational planning panel, scenario list, and live simulation status.

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<img src="assets/demo_geospatial.png" alt="Geospatial visualization" width="800"/>

Geospatial visualization: per-edge metrics, congestion overlays, and trip replay on the 2.5D basemap.

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Architecture

User (natural language)
    |
    v
Planner Agent (Claude LLM, Interactive Planning Protocol)
    |
    +--> AgentSUMO MCP Client --> AgentSUMO MCP Server (PyPI: agentsumo-mcp) --> SUMO
    |
    +--> SQLite MCP Client    --> SQLite MCP Server (Anthropic, open source)  --> simulations.db
    |
    +--> Filesystem MCP Client --> Filesystem MCP Server (Anthropic, open source) --> additional XML files

The reasoning layer (Planner Agent) lives in this repository. The execution layer (agentsumo-mcp) is published to PyPI and installed automatically as a dependency.

Tool Layer

The AgentSUMO MCP Server exposes 26 tools grouped into five capability categories that follow the simulation workflow. Full reference at agentsumo.readthedocs.io/.../tools.

Category	Purpose	Representative tools
Scenario Generation	Build a baseline SUMO simulation: OSM → network → trips → routes → run	osm_extract, net_convert, trip_generate, route_generate, sumo_runner
Policy Experimentation	Apply infrastructure, demand, and signal-control interventions	edge_edit_tool, reduce_lanes_tool, vehicle_generation_tool, flow_generation_tool, tls_offset_tool, tls_adaptation_tool
Result Analysis	Convert SUMO XML output to SQLite and render HTML reports	xml_to_sqlite_tool, simulation_report_tool
Visualization	Render networks, highlighted edges, and per-edge metric heatmaps	visualize_net_tool, visualize_edge_tool, visualize_policy_target_tool, visualize_edgedata_tool
Utility Functions	Network statistics, routing, road-name ↔ edge-id resolution, OD-coordinate validation, web-search grounding	network_summary_tool, route_analysis_tool, validate_od_coordinates_tool, web_search_tool

Installation

Requirements

• Python 3.10 or later
• SUMO 1.24 or later (locally installed, with SUMO_HOME set)
• Anthropic Claude API key (bring-your-own-key)
• Mapbox access token (used by the web map renderer)

1. Install SUMO

macOS

brew install sumo

Or download the installer from the Eclipse SUMO downloads page.

Windows — Download the installer from the Eclipse SUMO downloads page.

Linux (Ubuntu/Debian)

sudo add-apt-repository ppa:sumo/stable
sudo apt-get update
sudo apt-get install sumo sumo-tools sumo-doc

2. Set up the Python environment

Install uv:

# macOS / Linux
curl -LsSf https://astral.sh/uv/install.sh | sh

# Windows (PowerShell)
powershell -c "irm https://astral.sh/uv/install.ps1 | iex"

Clone the repository, create a virtual environment, and install AgentSUMO:

git clone https://github.com/mw-jeong/AgentSUMO
cd AgentSUMO

# Create a Python 3.12 venv
uv venv --python 3.12

# Activate the venv
source .venv/bin/activate              # macOS / Linux
# .venv\Scripts\activate               # Windows

# Install AgentSUMO and all dependencies
# (this also pulls agentsumo-mcp from PyPI as a dependency)
uv pip install -e .

3. Configure environment variables

AgentSUMO reads API keys and the SUMO path from environment variables. The easiest way is a .env file at the project root:

cp .env.example .env

Open .env in your editor and fill in:

ANTHROPIC_API_KEY (required) — Claude API key that drives the Planner Agent. Get one at the Anthropic Console.

ANTHROPIC_API_KEY=sk-ant-api03-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

MAPBOX_TOKEN (required for the web UI) — used to render the basemap. Get one at the Mapbox access tokens page.

MAPBOX_TOKEN=pk.eyJ1Ijoixxxxxxxxxxxxxxxxxx

SUMO_HOME (required) — absolute path to your local SUMO installation. The directory must contain bin/sumo (or bin/sumo.exe on Windows).

# macOS (Homebrew)
SUMO_HOME=/opt/homebrew/share/sumo

# macOS (Eclipse SUMO installer)
SUMO_HOME=/Library/Frameworks/EclipseSUMO.framework/Versions/<version>/EclipseSUMO  # e.g. 1.24.0; use the directory name installed under Versions/

# Windows
SUMO_HOME=C:\Program Files (x86)\Eclipse\Sumo

# Linux
SUMO_HOME=/usr/share/sumo

AGENTSUMO_MCP_OUTPUT_BASE (optional) — override the base directory where the MCP server writes simulation outputs (networks, trips, results). Defaults to the current working directory.

AGENTSUMO_MCP_OUTPUT_BASE=/path/to/your/output/dir

4. Run

# Web interface (opens at http://localhost:8000)
python web.py

# CLI mode
python chat.py

# Clean up simulation outputs
python clean.py

Project Structure

AgentSUMO/
├── agentsumo/
│   ├── agent/        # Planner Agent (Claude orchestrator + prompts)
│   ├── client/       # MCP clients (AgentSUMO, SQLite, Filesystem)
│   └── core/         # Configuration
├── agentsumo_mcp/    # AgentSUMO MCP Server source (also published to PyPI)
│   └── defaults/     # Packaged fixtures (e.g., vehicle_types.add.xml)
├── packaging/mcp/    # PyPI build configuration for agentsumo-mcp
├── web/              # Web interface (FastAPI + Jinja2 templates)
├── docs/             # Sphinx documentation source
├── tests/            # Unit tests
├── assets/           # README images
├── output/           # Runtime artifacts (auto-populated; 8 categories tracked
│                     #   via .gitkeep — simulations/, networks/, trips/,
│                     #   analysis/, reports/, uploads/, visualizations/, additional/)
├── chat.py           # CLI entry point
├── web.py            # Web server entry point
└── .env.example      # Environment variable template

Use the MCP Server Standalone

The AgentSUMO MCP Server can be used independently from this framework with any MCP-compatible LLM client (Claude Desktop, OpenAI tool clients, Gemini, local LLMs):

pip install agentsumo-mcp

Or via uvx without installing:

uvx agentsumo-mcp

The server is registered in the official MCP Registry under io.github.mw-jeong/agentsumo-mcp.

Troubleshooting

SUMO path error — Verify SUMO_HOME in your .env. The directory must contain bin/sumo (or bin/sumo.exe on Windows).

API key error — Verify ANTHROPIC_API_KEY in your .env is set to a valid Claude API key. The Planner Agent will refuse to start without it.

Dependency error — Re-resolve dependencies:

uv pip install -e . --upgrade

Legacy token files (deprecated, scheduled for removal in 0.2.0) — AgentSUMO still falls back to claude_api.txt and mapbox_token.txt at the project root when the corresponding environment variables are missing, but those code paths now emit a DeprecationWarning at import time. Use the .env workflow for new installations.

Documentation

Full documentation lives at agentsumo.readthedocs.io.

• Installation — SUMO, Python 3.10+, environment setup
• Tools — reference for all MCP tools
• Schema — simulations.db ER diagram and column reference
• Tutorials — walkthroughs of the paper case studies

Citation

If you use AgentSUMO in academic work, please cite:

@article{jeong2025agentsumo,
  title         = {AgentSUMO: An Agentic Framework for Interactive Simulation Scenario Generation in SUMO via Large Language Models},
  author        = {Jeong, Minwoo and Chang, Jeeyun and Yoon, Yoonjin},
  journal       = {arXiv preprint arXiv:2511.06804},
  year          = {2025},
  url           = {https://arxiv.org/abs/2511.06804}
}

License

MIT. See LICENSE.

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_{Developed at}

<img src="assets/logo_kaist.png" alt="KAIST" height="55"/>      <img src="assets/logo_caus.png" alt="CAUS" height="55"/>      <img src="assets/logo_stil.png" alt="Spatial Tech Innovation Lab" height="55"/>

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