Choose Narwhal API when
You need current rates, decimal-safe conversion, daily history, and Economics through one self-service account and quota.
Narwhal API vs XE Currency Data API
XE sells a commercial currency-data service for business applications, with broad fiat coverage and additional central-bank, crypto, precious-metal, and historical-rate options. Narwhal offers a smaller FX contract connected to its economic-data APIs and hosted MCP.
Decision
Choose XE when broad commercial currency coverage, selectable update frequency, alternate central-bank sources, or enterprise packaging is required. Choose Narwhal when its published currencies fit and a simpler multi-vertical REST and MCP product is preferable.
Choose the alternative when
You need XE's documented 174 fiat currencies, alternate central-bank rates, crypto or precious-metal symbols, or a commercial package tailored by frequency and volume.
Evidence by requirement
XE packages vary by update frequency, request volume, features, permitted application, caching, and usage rights. Confirm the commercial license and rate type required by the application.
| Requirement | Narwhal API | XE Currency Data API |
|---|---|---|
| Coverage | A smaller published currency set with explicit coverage and freshness pages. | XE documents 174 fiat currencies, 36 obsolete fiat currencies, more than 75 central-bank sources, 12 crypto currencies, and four precious metals. |
| Conversion and history | Current rates, decimal-safe conversion, and stored daily observations use one contract. | Its API specification documents currency lists, convert-from, convert-to, and historic-rate requests. |
| Formats | JSON REST plus MCP structured content. | The version-one specification documents JSON by default with optional XML and CSV responses. |
| Commercial model | Self-service Free, Basic, and Pro plans share quotas across REST and MCP. | Packages are selected by rate frequency and monthly request volume and are normally billed annually. |
| Agent access | Hosted MCP shares the same authentication and quota as REST. | No first-party hosted MCP endpoint was established in the checked XE material. |
Sources and review date
The comparison uses Narwhal's current public contract and the following first-party competitor pages.
Reviewed: