Free tier: first 10 active wallets per month free, full API access in test mode. Production: $1 per active wallet per month (active = at least one transaction in billing month). First 1M events per month free. Volume discounts available.
Key features
Live exchange rates for 166 currencies
JSON and XML response formats
Historical data back to year 2000
API Playground for testing requests
Analytics and monitoring dashboard
Team management and API key management
IP whitelisting and blacklisting
SDKs for multiple programming languages
Multiple API endpoints including convert and timeframe
Real-time usage metering and authorization before costs are incurred
Multi-asset wallets supporting USD, tokens, GPU hours, or custom units
Branded customer billing portal with self-service top-ups and history
Per-customer profitability analytics and event-level cost tracking
Support for usage-based, subscription, hybrid, credits, and seat-based pricing models
Hard budget ceilings per customer, agent, or team with real-time enforcement
Automatic top-up functionality when balance falls below customer-set threshold
MCP server integration for AI coding tools without backend required
REST API, OpenAPI spec, SDKs, and webhooks for developers
What makes it different
330 edge locations worldwide for ultra-low latency
Handles over 50 million monthly requests
99.9% uptime guarantee
Average response time of ~50 milliseconds
Free plan available for hobby projects and open-source
Real-time billing for usage incurred in milliseconds, not month-end invoicing
No revenue percentage cuts or payment processing markups, only per-wallet fees
Built by payment infrastructure engineers from Checkout.com, Visa, TrueLayer, and SumUp
Originated from Revenew platform that analyzed $1B/month in revenue
Currency API
Credyt™