Bank of Sierra Leone Exchange Rates Today & Official API

Official Bank of Sierra Leone rates for 25 Sept 2026: 1 USD = 22.822 SLE, 1 EUR = 25.998 SLE. All 24 currencies published, history back to 2026. Free JSON API for tax, audits, and compliant invoicing.

Bank of Sierra Leone official daily exchange rates as JSON: 24 currencies against the SLE, history back to 2026. Latest table on every plan. Get your API key.

About Bank of Sierra Leone

The Bank of Sierra Leone publishes a daily reference rate for the new leone (SLE) — the weighted-average mid rate of the interbank market — for about 25 currencies: the majors, the Gulf currencies, the rand, yuan and Hong Kong dollar, the SDR and the West African neighbours (CFA franc, dalasi, Guinean franc, cedi, naira, Liberian dollar, Cabo Verde escudo). It is the rate Sierra Leonean customs, the revenue authority and the banks convert at. The bank keeps only the last few weeks of sheets online, so our archive builds forward from September 2026.

• Official website: bsl.gov.sl
• Official rate publication: Daily Exchange Rates

Quick start

One request for the pair you need — USD to SLE at the official Bank of Sierra Leone rate:

curl "https://allratestoday.com/api/v1/central-bank/bsl/latest?source=USD&target=SLE" \
  -H "Authorization: Bearer art_live_your_key"

Or the bank's full published table:

curl "https://allratestoday.com/api/v1/central-bank/bsl/latest" \
  -H "Authorization: Bearer art_live_your_key"

On paid plans, any historical date or a time series:

curl "https://allratestoday.com/api/v1/central-bank/bsl/history?source=USD&target=SLE&from=2025-01-01" \
  -H "Authorization: Bearer art_live_your_key"

Latest published rates (2026-09-25)

Below is the current table from Bank of Sierra Leone, unmodified — what a call to /latest returns right now, with values SLE per 1 unit of each currency:

Download this table: Excel (.xlsx) CSV (paid plan required)

Base	Quote	Type	Rate
AED	SLE	reference	6.2133
AUD	SLE	reference	16.0419
CAD	SLE	reference	16.1301
CHF	SLE	reference	27.5366
CNY	SLE	reference	3.3994
CVE	SLE	reference	0.2359
DKK	SLE	reference	3.4778
EUR	SLE	reference	25.9985
GBP	SLE	reference	30.2077
GHS	SLE	reference	1.9661
GMD	SLE	reference	0.3134
GNF	SLE	reference	0.0654
HKD	SLE	reference	2.9097
JPY	SLE	reference	0.1443
KWD	SLE	reference	78.157
LRD	SLE	reference	0.1324
NGN	SLE	reference	0.0172
NOK	SLE	reference	2.3971
SAR	SLE	reference	6.0781
SEK	SLE	reference	2.3048
USD	SLE	reference	22.8215
XDR	SLE	reference	31.0076
XOF	SLE	reference	0.0397
ZAR	SLE	reference	1.3988

Node.js / TypeScript client

A dedicated zero-dependency npm package wraps these endpoints — bank-of-sierra-leone-exchange-rate:

npm install bank-of-sierra-leone-exchange-rate

import { getRate } from 'bank-of-sierra-leone-exchange-rate';

const pair = await getRate('USD', 'SLE', { apiKey: 'art_live_...' });
console.log(pair.rate, pair.rate_date);

Zero dependencies, TypeScript types included, and it runs anywhere fetch exists — Node 18+, Bun, Deno, and edge runtimes.

Full reference — installation, all four functions, response shapes, error codes: bank-of-sierra-leone-exchange-rate documentation.

Why use the official Bank of Sierra Leone rate?

When an auditor or tax office in Sierra Leone asks which rate you used, "the SLE mid-market rate at 14:32" is not an answer — the official rate published by Bank of Sierra Leone for that date is. This API returns exactly those published figures, stamped with the bank's own rate_date; on weekends and holidays the most recent published table is returned, as compliance rules expect.

If a pair isn't in the bank's published table, the API computes it from that table (inverse or cross via SLE) and marks it "derived": true — published and computed values are never silently mixed.

Endpoints

• GET /api/v1/central-bank/bsl/latest — latest table or single pair (all plans)
• GET /api/v1/central-bank/bsl/{YYYY-MM-DD} — the table for any date (paid plans)
• GET /api/v1/central-bank/bsl/history — time series, up to 5,000 rows (paid plans)
• GET /api/v1/central-bank/bsl/availability — publication calendar: the dates the bank actually published (all plans)

Full parameter reference in the API documentation. Every request counts toward your plan's monthly quota — rates change once per business day, so caching a published table locally makes a small quota go far.

Frequently asked questions

Is there an API for Bank of Sierra Leone exchange rates?

Yes — this one. Official daily SLE rates as clean JSON, latest table on every plan including free.

How often does Bank of Sierra Leone update its rates?

New tables land once per business day — the API picks each one up shortly after Bank of Sierra Leone publishes it (latest: 2026-09-25).

Is this the official published table?

Yes — the rows are Bank of Sierra Leone's published figures, untouched, with the original publication date attached. Pairs the bank didn't print are computed and flagged derived.

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