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title: Barcli Mesa API
emoji: 🌡️
colorFrom: blue
colorTo: red
sdk: docker
pinned: false
short_description: Mesa ABM simulation API for Barcelona climate vulnerability
---
# Barcli Mesa API
FastAPI backend providing Mesa-based agent simulation for the [Barcli](https://barcli.vercel.app) frontend.
## Endpoints
| Method | Path | Description |
|--------|------|-------------|
| `GET` | `/health` | Liveness check |
| `POST` | `/simulate/single` | Single-agent A\* pathfinding with climate weighting |
| `POST` | `/simulate/multi` | 20-agent shelter-seeking with 4 personas |
## POST /simulate/single
```json
{
"start": [-2.1734, 41.3851],
"end": [-2.1700, 41.3900],
"climate_weight": 0.5,
"baseline_index": null,
"policy_index": null
}
```
Returns `baseline_path`, `policy_path` (arrays of `[lng, lat]`) and `baseline_profile`, `policy_profile` (vulnerability scores 0–1 per node).
## POST /simulate/multi
```json
{
"shelter_coord": [-2.1720, 41.3870],
"baseline_index": null,
"policy_index": null,
"seed": 42
}
```
Returns per-frame `baseline_snapshots`/`policy_snapshots` and `persona_breakdown` with arrived counts per persona.
## Data files required
Place these in the `data/` directory (same files as the frontend's `public/data/`):
- `data/climate_isochrone.geojson` — road network (LineString features)
- `data/data.geojson` — climate vulnerability points (heat, SPEI, urban_health fields)
- `data/climate_shelters.geojson` — shelter locations (Point features)
## Files
```
├── app.py FastAPI app + graph loading + routes
├── mesa_single.py Mesa single-agent A* model
├── mesa_multi.py Mesa multi-agent shelter model
├── requirements.txt
├── Dockerfile
└── data/
├── climate_isochrone.geojson
├── data.geojson
└── climate_shelters.geojson
```
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