Open data
Open tourism intelligence for the destination
Marco Três doesn't just show data to the visitor — it offers a free public API with the Triple Frontier's intelligence in real time: exchange rates for all three countries, weather, forecast movement, the events agenda and the community's top picks. Any destination, public manager, hotel, agency or Itaipu itself can consume and reuse it.
Endpoint
GET https://marcotres.com.br/api/v1/dadosCORS open, no key, refreshed every 10 minutes. CC BY 4.0 license.
Example response
Real JSON structure (illustrative values):
{
"fonte": "Marco Três — marcotres.com.br",
"licenca": "CC BY 4.0",
"atualizado_em": "2026-06-13T13:00:00.000Z",
"cambio": { "base": "BRL", "usd": 5.42, "guarani_1000": 0.74, "peso_ar_1000": 4.10 },
"clima_foz": { "temperatura_c": 27, "condicao": "céu limpo" },
"movimento_previsto": {
"nivel": "Alto",
"resumo": "Weekend — attractions busier than weekdays.",
"recomendacao": "Arrive early to avoid queues."
},
"eventos_proximos": [ { "titulo": "...", "inicio": "2026-06-20", "cidade": "Foz do Iguaçu", "categoria": "cultura" } ],
"recomendados_comunidade": [ { "nome": "...", "categoria": "comer", "cidade": "Foz do Iguaçu", "recomendacoes": 12 } ]
}Field dictionary
| Field | Type | Description |
|---|---|---|
| atualizado_em | ISO 8601 | When the response was generated (UTC). |
| cambio.usd | number | Cost of 1 US dollar in Brazilian reais. |
| cambio.guarani_1000 | number | Value of 1,000 Paraguayan guaraníes in reais. |
| cambio.peso_ar_1000 | number | Value of 1,000 Argentine pesos in reais. |
| clima_foz.temperatura_c | number | Current temperature in Foz do Iguaçu (°C). |
| clima_foz.condicao | string | Weather condition. |
| movimento_previsto.nivel | enum | Low · Moderate · High · Very high. |
| movimento_previsto.resumo | string | Natural-language read of the day. |
| movimento_previsto.recomendacao | string | Practical tip (best time, avoid queues). |
| eventos_proximos[] | array | Upcoming events: title, start, city, category. |
| recomendados_comunidade[] | array | Top recommended places: name, category, city, recommendation count. |
Use cases
Itaipu anticipates visitation peaks
Consuming movimento_previsto + the three countries' holidays, attraction management sizes staff and opens gates ahead of the peak — cutting queues.
Hotels adjust rates and occupancy
Cross-referencing movement level, exchange and upcoming events, hospitality anticipates demand and plans revenue management.
Apps and kiosks embed the data
Any app, kiosk or assistant shows exchange, weather and the best time to visit, with attribution to Marco Três.