eSIMfly API provides REST endpoints to provision and activate eSIMs globally for apps and services.
- for
- Developers building travel, booking, fintech or AI-enabled apps that need global mobile connectivity.
- pricing
- contact sales
Key features
- Global Coverage — Access eSIM data packages in 200+ countries and territories instantly.
- Instant Activation — eSIMs activate immediately upon purchase with no physical shipping.
- Official SDK — Zero-dependency npm SDK for request signing, idempotent orders and webhook verification.
- Real-time Webhooks — Signed webhooks notify on installation, status changes, data usage and top-ups.
- AI-ready Docs — Copy-paste prompts and hosted MCP server enable direct calls from Claude, ChatGPT or Cursor.
- Competitive Pricing — Wholesale rates with volume discounts and transparent, fee-free pricing.
Use cases
- Sell eSIMs directly from a travel booking platform
- Add mobile data connectivity to fintech apps for international users
- Provide last-minute travelers with instant data activation
- Integrate eSIM provisioning into AI assistants like Claude or ChatGPT
eSIMfly API vs alternatives
 eSIMfly API |  Postman |  Insomnia |  Twilio |  OpenRouter | |
|---|---|---|---|---|---|
| Best for | Instant global eSIM provisioning | API design, testing and documentation | REST/GraphQL API testing | Messaging and voice communications | Unified AI model access |
| Pricing | Contact sales | Subscription | Free | Subscription | Subscription |
| DevHunt upvotes | 0 | 0 | 0 | 0 | 0 |
| Launched | Jan 2026 | — | — | — | — |
- eSIMfly API vs Postman: General API design and testing platform, not specialized for eSIM provisioning
- eSIMfly API vs Insomnia: Open-source API client focused on testing, not eSIM services
- eSIMfly API vs Twilio: Communications APIs (SMS/voice) rather than mobile data eSIMs
- eSIMfly API vs OpenRouter: Aggregates AI model APIs, unrelated to mobile connectivity
eSIMfly API FAQ
How do I start integrating eSIMfly API?+
Install the npm SDK with npm install @esimfly/sdk or use the documented REST endpoints; the quick-start guide walks you through request signing and catalog sync.
What countries are supported?+
eSIMfly provides coverage in over 200 countries and territories worldwide.
How are eSIM activations delivered?+
Activations occur instantly after purchase; no physical SIM shipping is required.
Can I receive real-time status updates?+
Yes, signed webhooks are sent for installation, status changes, data usage, network events and top-ups.
Is the API usable by AI models?+
The docs include copy-paste prompts and a hosted MCP server so AI assistants like Claude, ChatGPT or Cursor can call the API directly.
Summarized by DevHunt from docs.esimfly.net · Oct 8, 2026. Details may change; check the official site.
