WST to SLL exchange rate API

Tala to Leone · quoted 2026-10-03

8268.17

▼ +1.74% over 6M

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 last 6 months, WST/SLL traded between 7694.10 and 9131.53, averaged 8389.00 and fell 1.74%. 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 6M

7D 30D 6M YTD 1Y 5Y

WST/SLL over 6M: show the values

Point	WST/SLL
2026-04-06	8414.74
2026-04-17	7735.79
2026-04-24	7694.10
2026-05-01	7782.59
2026-05-08	7809.72
2026-05-16	8864.17
2026-05-24	8472.89
2026-05-31	8476.09
2026-06-09	8383.01
2026-06-16	9131.53
2026-06-23	8330.36
2026-06-30	8279.64
2026-07-07	8364.40
2026-07-14	8345.03
2026-07-21	8407.26
2026-07-28	8883.41
2026-08-04	8444.25
2026-08-11	8410.81
2026-08-18	8454.32
2026-08-26	8481.93
2026-09-02	8459.10
2026-09-09	8461.97
2026-09-16	9031.27
2026-09-23	8387.22
2026-10-02	8340.12

High

9131.53

Low

7694.10

Average

8389.00

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