BTN to SLL exchange rate API
Ngultrum to Leone · quoted 2026-10-02
239.3513
▼ +2.97% over 6M
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 last 6 months, BTN/SLL traded between 218.8076 and 257.2859, averaged 238.1004 and fell 2.97%. 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 6M: show the values
| Point | BTN/SLL |
|---|---|
| 2026-04-05 | 246.6661 |
| 2026-04-16 | 225.0963 |
| 2026-04-23 | 222.9193 |
| 2026-04-30 | 221.1336 |
| 2026-05-07 | 221.5651 |
| 2026-05-15 | 218.8076 |
| 2026-05-23 | 238.9741 |
| 2026-05-30 | 240.7873 |
| 2026-06-06 | 240.0467 |
| 2026-06-15 | 241.3051 |
| 2026-06-22 | 241.9632 |
| 2026-06-29 | 241.8394 |
| 2026-07-06 | 239.7270 |
| 2026-07-13 | 239.2586 |
| 2026-07-20 | 237.3155 |
| 2026-07-27 | 237.6915 |
| 2026-08-03 | 240.6378 |
| 2026-08-10 | 240.1161 |
| 2026-08-17 | 239.6982 |
| 2026-08-25 | 238.8108 |
| 2026-09-01 | 241.4950 |
| 2026-09-08 | 242.1290 |
| 2026-09-15 | 239.2652 |
| 2026-09-22 | 257.2859 |
| 2026-09-30 | 256.7249 |
High
257.2859
Low
218.8076
Average
238.1004
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.