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 any border attraction can consume and reuse it.

Live snapshot (now)

GET https://www.marcotres.com.br/api/v1/now

The destination state right now in JSON: cambio, clima_foz, cataratas_vazao (ANA) and indice_marco_tres (0-100). Each block states its source. CORS open, no key. CC BY 4.0 license.

See the live snapshot (JSON) →

Full endpoint

GET https://www.marcotres.com.br/api/v1/dados

CORS open, no key, refreshed every 10 minutes. CC BY 4.0 license.

See the live data (JSON) →

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

An attraction anticipates peaks

Consuming forecast movement + the three countries' holidays, an attraction, the Falls, Itaipu, the Bird Park, 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 rates and occupancy.

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.

Also in português · español.