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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.

Latest
+0.28%
2026-10-05
Mean
+0.96%
643 days
Series starts
2025-01-01
daily, no gaps
Licence
CC BY 4.0
credit required

Endpoints

All are GET, all are public, all respond with permissive CORS headers.

Daily series — JSON

application/json

The 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.

Endpoint
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/csv

Same rows, one header line, downloads as a file. Columns: date, usdt_krw, usd_krw, premium_pct, volume_krw, fx_carried.

Endpoint
https://tegongkorea.com/api/market/history?format=csv
from, to, limit
As above.

Chart image

image/svg+xml

Redraws 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.

Endpoint
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/html

A 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.

Endpoint
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 embed
<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>
Image tag
<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.

Latest reading
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).
Last 30 days
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).
Year to date
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).
Full series
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.

Fixed version (DOI)
Tegong. Tether (USDT) premium on the Korean won market, daily series. https://doi.org/10.5281/zenodo.22270442
Current series (URL)
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.

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.