Live data

Five panels read Korean government APIs at the moment you open the page. Produce prices are the exception — fetched twice a day and stored — and that panel explains why.

These six numbers do not point at the same moment

Number	How often it changes	Lag before you see it
Comprehensive Air-quality Index (CAI)	Hourly	About an hour
Apartment sale price	As filings arrive	Up to 30 days from contract
Base exchange rate	Once per business day	Same morning
Jeonse loan rates by bank	Weekly	That week
Seoul policy-loan rates by bank	Irregular (on update)	Not a moment — a rolling three months
Farm produce wholesale and retail prices	Once per survey day	Not on open — fetched twice a day and stored

Six feeds, one page each

Air quality where you are Pick a station to see the CAI and the pollutant that set it. Hourly Apartment sale prices Pick a district and period to see filed transactions, newest first. As filings arrive Exchange rate — the base rate Pick a currency to see today’s published base rate. Once per business day Jeonse loan rates The rate each bank applies to jeonse deposit loans, published weekly by the Korea Housi… Published weekly Seoul policy loans, by bank How much of the interest the city actually pays, bank by bank. These are loans to SMEs… Irregular · last three months Farm produce prices Pick a category and what to compare against — the normal-year price, a year ago, a mont… Fetched twice a day

When a number does not appear

Five read the issuing agency’s own API. If the upstream does not answer, neither can this page. When that happens we do not dress an old value up as a new one — we say we could not load it.

Air quality upstream throttles under load, so a failed call is retried once, quietly. If that also fails we show the last value we held — but only if it is less than six hours old, because that is how long we keep it. Past that, nothing is shown at all. An undated old reading is worse than saying we could not load it.

Sources

Number	Issuing body	Licence
Comprehensive Air-quality Index	Ministry of Environment / Korea Environment Corporation, AirKorea (data.go.kr)	Attribution · no derivatives
Apartment sale prices	Ministry of Land, Infrastructure and Transport, Real Transaction Price disclosure (data.go.kr)	Unrestricted
Base exchange rate	Export-Import Bank of Korea, published FX rates	Attribution
Jeonse loan rates	Korea Housing Finance Corporation (data.go.kr)	Attribution
Seoul policy-loan rates	Seoul Open Data Plaza / Seoul Credit Guarantee Foundation	Attribution
Farm produce prices	Ministry of Agriculture, Food and Rural Affairs / Korea Agro-Fisheries & Food Trade Corporation (aT), KAMIS Open-API	Unrestricted

Five of the APIs are called from our server only. Produce prices are served from a file fetched in advance from within Korea, because the KAMIS server blocks calls from overseas networks. Either way, keys are never sent to the browser. Which region you picked is not recorded.