Choose Narwhal API when
You need current rates, decimal-safe conversion, stored daily history, and adjacent Narwhal APIs through a single authenticated contract.
Narwhal API vs ExchangeRate-API
ExchangeRate-API focuses on simple currency-rate and pair-conversion endpoints with open, free, and paid access options. Narwhal connects its smaller FX product to Economics and hosted MCP under one account.
Decision
Choose ExchangeRate-API for a simple specialist currency API, open no-key access, or its documented historical product. Choose Narwhal when its currency coverage fits and the same key also needs Economics, Palmoil, Calendars, or MCP.
Choose the alternative when
You need its no-key daily endpoint, all-rates response, pair conversion, enriched currency metadata, or historical data reaching 1990 for some pairs.
Evidence by requirement
The open, Free, Pro, Business, and Volume offerings differ. Verify attribution, caching, update frequency, history, redistribution terms, and request limits for the selected plan.
| Requirement | Narwhal API | ExchangeRate-API |
|---|---|---|
| Product shape | FX is integrated with other Narwhal financial and public-data APIs. | A focused exchange-rate and conversion service with several access tiers. |
| Current rates | Current rates are published for the documented currency set with source and freshness semantics. | Its Standard endpoint returns rates from one supplied base currency to the supported currency list. |
| Conversion and history | Decimal-safe conversion and stored daily observations are live features. | Pair conversion is available, while advanced plans add enriched data and historical endpoints with some pairs reaching 1990. |
| Open access | An API key is required; the Free plan shares quota across live products. | A rate-limited daily endpoint is available without a key and requires attribution; keyed free and paid plans add allowances and features. |
| Agent access | Hosted MCP uses the same key and quota as REST. | No first-party hosted MCP endpoint was established in the checked documentation. |
Sources and review date
The comparison uses Narwhal's current public contract and the following first-party competitor pages.
Reviewed: