Why Choose eSIMfly Business API?
Everything you need to sell eSIMs from your own product — SDK, REST API, webhooks and AI-ready docs
Official SDK
npm install @esimfly/sdk — request signing, idempotent orders, paced catalog sync and webhook verification built in, zero dependencies. Other languages use the documented REST API. Quick start →
Global Coverage
Access to 200+ countries and territories. Deliver eSIM data packages instantly to travelers anywhere in the world.
Real-time Webhooks
Get a signed webhook the moment an eSIM is installed, changes status or runs low on data — no polling. Usage, live status, network events and top-ups are one call away. Webhooks →
Instant Activation
eSIMs are activated instantly upon purchase. No physical shipping, no delays. Perfect for last-minute travelers.
Competitive Pricing
Wholesale rates for businesses. Volume discounts available. Transparent pricing with no hidden fees.
Built for AI Assistants
Copy-paste prompts for every endpoint, one complete prompt for the whole API, and an hosted MCP server (mcp.esimfly.net/mcp) so Claude, ChatGPT or Cursor can call the API directly. AI integration →