WST to SLL exchange rate API

Tala to Leone · quoted 2026-10-03

8268.17

▼ +0.27% over YTD

1 WST = 8268.17 SLL · 1 SLL = 0.000121 WST · Get this rate via the API

1 WST buys 8268.17 SLL as of 2026-10-03, so 1 SLL buys 0.000121 WST. Over the year to date, WST/SLL traded between 7619.80 and 9150.07, averaged 8318.62 and fell 0.27%. The API holds daily WST/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.

WST/SLL over YTD

7D 30D 6M YTD 1Y 5Y

WST/SLL over YTD: show the values

Point	WST/SLL
2025-12-31	8290.23
2026-01-07	8261.19
2026-01-14	8287.33
2026-01-21	8351.37
2026-01-28	8407.25
2026-02-04	8475.60
2026-02-11	8484.04
2026-02-18	8523.23
2026-02-25	8471.12
2026-03-04	8468.05
2026-03-11	8461.53
2026-03-18	8415.37
2026-03-25	8355.28
2026-04-01	8365.56
2026-04-08	8357.46
2026-04-19	7726.14
2026-04-26	7700.01
2026-05-03	7792.49
2026-05-10	7810.13
2026-05-18	7745.14
2026-05-26	8469.60
2026-06-02	9150.07
2026-06-11	8353.38
2026-06-18	8416.98
2026-06-25	8301.35
2026-07-02	7619.80
2026-07-09	8339.28
2026-07-16	8404.53
2026-07-23	8406.82
2026-07-30	8392.00
2026-08-06	8424.22
2026-08-13	8671.77
2026-08-21	8468.97
2026-08-28	8494.01
2026-09-04	9066.50
2026-09-11	8436.54
2026-09-18	7656.66
2026-09-25	8337.14

High

9150.07

Low

7619.80

Average

8318.62

For developers

Get this rate via the API

One GET request returns the WST/SLL rate as JSON. The free plan includes 1,000 requests a month, with no credit card required.

Get a free API key Read the API docs

cURL

curl -X GET "https://api.fxfeed.io/v2/latest?api_key=YOUR_API_KEY&base=WST&currencies=SLL"

JavaScript

const response = await fetch("https://api.fxfeed.io/v2/latest?api_key=YOUR_API_KEY&base=WST&currencies=SLL");
const data = await response.json();

Python

import requests

data = requests.get("https://api.fxfeed.io/v2/latest?api_key=YOUR_API_KEY&base=WST&currencies=SLL").json()

Replace YOUR_API_KEY with the key from your dashboard.

WST/SLL API questions

How do I get the WST/SLL exchange rate from an API?

Send one GET request to https://api.fxfeed.io/v2/latest?api_key=YOUR_API_KEY&base=WST&currencies=SLL, replacing YOUR_API_KEY with your own key. The JSON response carries the date and the latest WST/SLL rate in rates.SLL.

How far back does WST/SLL historical data go?

Daily WST/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 WST/SLL exchange rate API?

Yes. The free plan includes 1,000 requests a month, with no credit card required; paid plans raise the limit.

SLL/WST · inverse 0.000121 WST/USD 0.35860 WST/EUR 0.31866 WST/GBP 0.27087 WST/JPY 56.6085 WST/CHF 0.29724 WST/AUD 0.51557

Put these rates in your application

One endpoint, JSON responses, 160+ currencies and history back to 1999. Start on the free plan.

Get a free API key Read the docs