For publishers
Data, API and reuse
Everything in this section is published so that it can be reused. There is no key, no registration and no rate limit worth mentioning. Take the numbers, take the chart, take the translation. Credit Tegong and link back, and that is the whole condition.
Endpoints
All are GET, all are public, all respond with permissive CORS headers.
Daily series — JSON
application/jsonThe full series plus the method string, the input descriptions and a computed summary. Every row carries the raw close and the raw FX rate, so the premium can be recomputed independently.
https://tegongkorea.com/api/market/history
- from=YYYY-MM-DD
- First date to include.
- to=YYYY-MM-DD
- Last date to include.
- limit=N
- Most recent N rows. Applied after from and to.
Daily series — CSV
text/csvSame rows, one header line, downloads as a file. Columns: date, usdt_krw, usd_krw, premium_pct, volume_krw, fx_carried.
https://tegongkorea.com/api/market/history?format=csv
- from, to, limit
- As above.
Chart image
image/svg+xmlRedraws from live data on every request and carries the source line inside the image, so it cannot go stale or lose attribution after publication. Cross-origin requests are allowed.
https://tegongkorea.com/api/chart/premium.svg
- theme=dark
- Dark background. Default is light.
- w=720
- Width in pixels, 320 to 1600.
- h=260
- Height in pixels, 160 to 900.
Embeddable widget
text/htmlA self-contained panel for an iframe: headline number, mean, chart and source line. Not indexed, so it will not compete with your own page in search.
https://tegongkorea.com/embed/tether-premium
- theme=dark
- Dark background. Default is light.
Put the chart in your page
Two ways. The iframe gives you the live panel with the numbers; the image tag gives you a plain picture that works inside a newsletter or a CMS that strips frames. Both redraw themselves, so a piece published today is still showing the right figure next month.
<iframe src="https://tegongkorea.com/embed/tether-premium" width="100%" height="400" frameborder="0" loading="lazy" title="Tether premium on the Korean won market"></iframe>
<img src="https://tegongkorea.com/api/chart/premium.svg" alt="Tether premium on the Korean won market" width="720" height="260">
Sentences you can paste
Written out with the figures already filled in, checked against the series on this page and rewritten every time the data updates. If you need a line about the Korean market and do not want to compute it yourself, take one of these. The attribution is inside the sentence, so nothing has to be added later.
On 2026-10-05 Tether traded at +0.28% against the European Central Bank USD/KRW reference rate on the South Korean won market (Tegong, https://doi.org/10.5281/zenodo.22270442).
Over the 30 days to 2026-10-05, the Tether premium on the South Korean won market averaged +0.26%, and closed below parity on 9 of those days (Tegong, https://doi.org/10.5281/zenodo.22270442).
So far in 2026, the Tether premium on the South Korean won market has averaged -0.10% across 278 trading days (Tegong, https://doi.org/10.5281/zenodo.22270442).
Across 643 consecutive daily observations from 2025-01-01 to 2026-10-05, the Tether premium on the South Korean won market averaged +0.96%, ranging from -3.22% on 2026-06-01 to +8.78% on 2025-02-02 (Tegong, https://doi.org/10.5281/zenodo.22270442).
Citation files
For a reference manager rather than a paragraph. Each file is generated from the live series, so the coverage line inside it is never stale.
How to cite
Use the DOI when you are citing a fixed version of the dataset, which is what a paper or a filing needs. Use the page URL when you are citing the figure as it stands today, which is what a news piece needs.
Tegong. Tether (USDT) premium on the Korean won market, daily series. https://doi.org/10.5281/zenodo.22270442
Tegong. "Tether premium on the Korean won market." https://tegongkorea.com/en/tether-premium (accessed 3 September 2026).
What the licence actually requires
CC BY 4.0. You may copy, redistribute, adapt and build on this material, including commercially. The one requirement is attribution: name Tegong (테공), link to the page or the DOI, and say if you changed anything. You do not need to ask first and you do not need to tell us — though a note to [email protected] is welcome, and it is how we hear about errors.
Update schedule and stability
The series is rebuilt weekly, on Mondays, and the last thirty days are re-synced each time so that late corrections to the exchange or FX data are picked up. Endpoint paths and CSV column names are treated as a published interface: if one has to change, the old form will keep working and this page will say so. The DOI at 10.5281/zenodo.22270442 points at a frozen deposit and never changes underneath a citation.
Primary sources
Every figure on this page traces back to one of these. Please verify against the original before publishing.
- Upbit public daily candles (KRW-USDT) — The price input, exactly as this site reads it.
- Frankfurter — ECB reference rates — The FX input.
- Deposited dataset, DOI 10.5281/zenodo.22270442
Related pages
Something missing, or a format you would rather have? [email protected]. Requests from people who intend to publish get built. Back to the English section.