Changelog

Webhook support (Pro tier) — subscribe to rate-change events and receive signed HTTP POST payloads when any configured currency pair moves beyond your threshold. Configure up to 10 webhooks per key from the dashboard.

5-minute rate updates via FastForex — Pro tier keys now receive rates refreshed every 5 minutes, sourced from FastForex in addition to the existing ECB + FRED pipeline. Latency from source to edge is under 90 seconds.

/v1/timeseries endpoint — query a currency pair across a date range in a single call. Supports up to 366 days per request on Pro, 90 days on Starter. Returns an array of { date, rate } objects.

HMAC-SHA256 payload signing for webhooks — every webhook delivery includes an X-Xchangr8-Signature header so you can verify the payload origin. See the webhooks documentation for verification examples in Node, Python, and Go.

Rate alert delivery latency reduced from ~8s to under 2s by moving to Cloudflare Queues rather than cron-based polling.

Dashboard webhook log now shows the last 50 delivery attempts with status codes, payload previews, and retry history.

xchangr8 public beta — the API is now open to all developers. Sign up at xchangr8.com and get your free API key in under 60 seconds.

31 currencies across all major global trading pairs — USD, EUR, GBP, JPY, AUD, CAD, CHF, CNY, HKD, SGD, and 21 more. Every currency supports any base via on-the-fly cross-rate calculation.

ECB eurofxref + FRED DEXJPUS dual sourcing — two independent official data feeds are reconciled on every update cycle. If one source is delayed, the other keeps the API current. No single point of data failure.

Cloudflare edge delivery across 300+ PoPs — responses are served from the closest Cloudflare location to the caller. Average global response time at beta launch: 17ms.

Free tier: 10,000 req/month, no credit card — permanent free tier available to all developers. Includes sandbox key, any base currency, and 7-day historical data.

Developer dashboard — key management, usage graphs, request logs, and billing all in one place. View per-key usage breakdowns and set budget alerts.

Private alpha launch — the core API is live for a small group of invited developers. Focus is on stability and data accuracy before public opening.

Core API endpoints — four foundational routes: /v1/latest, /v1/convert, /v1/historical, and /v1/currencies. All return JSON with consistent envelope shape.

Durable Objects burst rate limiting — per-key rate limiting enforced at the Cloudflare edge using Durable Objects. Burst windows of 1s and 60s are tracked independently to prevent abuse without penalising bursty but well-behaved clients.

D1 + KV hybrid storage — historical rates stored in Cloudflare D1 (SQLite at the edge) for queryable range access; latest rates cached in KV for sub-millisecond hot reads. Cache TTL aligns with update frequency tier.