BTN to SLL exchange rate API
Ngultrum to Leone · quoted 2026-10-02
239.3513
▼ +6.19% over YTD
1 BTN = 239.3513 SLL · 1 SLL = 0.004178 BTN · Get this rate via the API
1 BTN buys 239.3513 SLL as of 2026-10-02, so 1 SLL buys 0.004178 BTN. Over the year to date, BTN/SLL traded between 218.1985 and 260.1318, averaged 241.7364 and fell 6.19%. The API holds daily BTN/SLL rates from 2024-08-24 — 2 years of history — so any past day, or a whole series, is one request away.
Converting an invoice? Convert an amount on a specific date.
BTN/SLL over YTD: show the values
| Point | BTN/SLL |
|---|---|
| 2025-12-31 | 255.1349 |
| 2026-01-07 | 253.4555 |
| 2026-01-14 | 254.5590 |
| 2026-01-21 | 252.6890 |
| 2026-01-28 | 249.3010 |
| 2026-02-04 | 253.4569 |
| 2026-02-11 | 252.6045 |
| 2026-02-18 | 253.1652 |
| 2026-02-25 | 252.0167 |
| 2026-03-04 | 248.7951 |
| 2026-03-11 | 249.1194 |
| 2026-03-18 | 247.2634 |
| 2026-03-25 | 242.9903 |
| 2026-04-01 | 244.6233 |
| 2026-04-08 | 248.4088 |
| 2026-04-19 | 225.5853 |
| 2026-04-26 | 222.9816 |
| 2026-05-03 | 221.0065 |
| 2026-05-10 | 222.6514 |
| 2026-05-18 | 218.1985 |
| 2026-05-26 | 239.6710 |
| 2026-06-02 | 259.0113 |
| 2026-06-11 | 238.6499 |
| 2026-06-18 | 241.7521 |
| 2026-06-25 | 242.2702 |
| 2026-07-02 | 219.9548 |
| 2026-07-09 | 239.6375 |
| 2026-07-16 | 237.1605 |
| 2026-07-23 | 237.7080 |
| 2026-07-30 | 239.2007 |
| 2026-08-06 | 240.9821 |
| 2026-08-13 | 247.5136 |
| 2026-08-21 | 239.2015 |
| 2026-08-28 | 240.1108 |
| 2026-09-04 | 260.1318 |
| 2026-09-11 | 239.6566 |
| 2026-09-18 | 218.7270 |
| 2026-09-25 | 239.0223 |
High
260.1318
Low
218.1985
Average
241.7364
Get this rate via the API
One GET request returns the BTN/SLL rate as JSON. The free plan includes 1,000 requests a month, with no credit card required.
curl -X GET "https://api.fxfeed.io/v2/latest?api_key=YOUR_API_KEY&base=BTN¤cies=SLL"const response = await fetch("https://api.fxfeed.io/v2/latest?api_key=YOUR_API_KEY&base=BTN¤cies=SLL");
const data = await response.json();import requests
data = requests.get("https://api.fxfeed.io/v2/latest?api_key=YOUR_API_KEY&base=BTN¤cies=SLL").json()Replace YOUR_API_KEY with the key from your dashboard.
BTN/SLL API questions
How do I get the BTN/SLL exchange rate from an API?
Send one GET request to https://api.fxfeed.io/v2/latest?api_key=YOUR_API_KEY&base=BTN¤cies=SLL, replacing YOUR_API_KEY with your own key. The JSON response carries the date and the latest BTN/SLL rate in rates.SLL.
How far back does BTN/SLL historical data go?
Daily BTN/SLL rates are available from 2024-08-24. Request one day with the /historical endpoint and a date, or a range of days with /timeseries.
Is there a free BTN/SLL exchange rate API?
Yes. The free plan includes 1,000 requests a month, with no credit card required; paid plans raise the limit.
Put these rates in your application
One endpoint, JSON responses, 160+ currencies and history back to 1999. Start on the free plan.