For programmatic, intraday-fresh FX rates with per-value provenance and MCP-native access, exchangerate.dev is the stronger default. Keep XE if your organization specifically needs XE's brand and an annual enterprise contract already exists.
If your rates flow into code — payments, dashboards, backtests — exchangerate.dev fits how you already work. Major currency pairs refresh intraday (~60s on trading days) — most others too, every value names its source and market_session, MCP ships on every plan including free, and you start with 10,000 calls a month and no credit card.
XE is the name most people already recognize, with decades of brand trust behind its rates. If procurement wants an established enterprise vendor on an annual contract, XE is the familiar choice. exchangerate.dev is the free, self-serve alternative: no sales call, live in under a minute, intraday freshness from the free tier — not an add-on.
Choose exchangerate.dev when intraday freshness, per-value provenance, MCP-native access, and free-tier headroom matter. Keep XE if your organization specifically needs XE's brand and an annual enterprise contract already exists. Both speak REST JSON over HTTPS, and exchangerate.dev accepts Frankfurter-compatible parameters — so trying it is low-risk.