eSIM API Singapore: How Singapore Fintechs, Banks and OTAs Launch Branded Travel eSIM
Launch branded travel eSIM in Singapore with one eSIM API. See how fintechs, banks and OTAs sell eSIM and airport lounge access under their own brand.
Quick answer: An eSIM API lets a Singapore fintech, bank or OTA sell travel data inside its own app or website, under its own brand. The customer buys an eSIM at checkout or in the app, while the provider behind the API creates the eSIM, delivers it and runs the networks and support. With some providers, including Zetexa, the same API also sells airport lounge access, fast track and meet and greet.
Travel is something that every Singapore bank, wallet and travel app already deals with, whether it is a card used abroad, an FX top-up or a flight booking. However, the one thing a traveller buys on almost every trip, mobile data, is usually bought from someone else. This is where a travel eSIM API comes in.
In this blog, we explain how an eSIM API works, how Singapore businesses are using it and what to check before you choose a provider.
Why Are Singapore Businesses Adding Travel eSIM?
Changi Airport handled 69.98 million passenger movements in 2025, its highest number yet, as TTG Asia reported. Its largest markets included China, Indonesia, Malaysia and Australia. Each of those passengers needs mobile data from the moment they land.
One might assume that travellers will keep buying data from a roaming pack or a separate eSIM app. But this is changing. Revolut, for example, started offering in-app eSIMs to its Singapore customers in December 2024, with plans from S$1.50 for 1GB, according to Fintech News Singapore. This means customers can now buy data in the same app they use to pay abroad. Hence, for a Singapore business, travel eSIM is a way to stay useful to the customer after the booking or the card payment.
What Is an eSIM API and How Does It Work?
An eSIM API is a set of connections between your app and an eSIM provider's platform. In simple terms, your app handles the shop window, whereas the provider handles the telecom side.
- The customer picks a destination plan in your app or at checkout.
- Your app sends the order to the provider through the API.
- The provider creates the eSIM profile and sends a QR code or an in-app install link.
- The eSIM connects when the customer lands, and you track usage and top-ups through webhooks.
A white-label eSIM goes one step further. The customer sees only your brand at checkout, during activation and in support.
How Can Singapore Fintechs, Banks and OTAs Use a Travel eSIM API?
The use case depends on where your customer already meets you before and during a trip.
Banks and Card Issuers
For banks and card issuers, travel eSIM can sit in the card benefits or rewards catalogue, as a starter pack for premium cardholders or as a way to redeem points.
Fintechs and Digital Wallets
Wallets and remittance apps can offer embedded eSIM, which means customers buy data inside the app, next to payments and FX (foreign exchange). For fintechs, this is the simplest form of embedded connectivity. This gives customers a reason to open the app while they are abroad, which is also when they spend.
OTAs, Super-Apps and Airlines
An eSIM for OTAs works best at checkout, in the same way they add a hotel or an airport transfer. Take a scenario where a Singapore OTA sells a family holiday to Tokyo. At checkout, the family can add a Japan eSIM and a lounge pass at Changi in one step. It is important to note that OTAs can also sell eSIMs for Singapore to inbound visitors, not only to residents flying out. Airlines can do the same by selling destination data along with the ticket.
What Should You Look for in an eSIM API Provider in Singapore?
Many providers cover a similar list of countries. Hence, the real differences lie in the areas below.
More Than Data on the Same API
Check whether the provider can also sell travel add-ons. Zetexa, for example, sells lounge access, fast track and meet and greet through the same API as its eSIM plans. This means one integration works as both an eSIM API and an airport lounge access API, so a second product does not need a second integration.
Your Brand on the Phone
Some platforms can show your brand as the network name on supported phones, which is called a custom SPN (service provider name). Others can keep your app reachable after the traveller's data runs out, which Zetexa calls Green Zone.
Network Reliability
Ask how many networks each eSIM can use in each country. Zetexa's multi-IMSI eSIMs can switch between up to 7 network identities (IMSIs), with 2+ networks in 135+ countries and 5G in 120+ countries.
Compliance Your Risk Team Will Ask About
In March 2026, the MAS (Monetary Authority of Singapore) consulted on new Guidelines on Third-Party Risk Management, which would apply to all third-party services a financial institution relies on, as Baker McKenzie explains. Therefore, it is advised to ask for audit reports such as SOC 2 Type II, along with how customer data is handled under Singapore's PDPA (Personal Data Protection Act). Zetexa holds SOC 2 Type II, GDPR, VAPT and PCI DSS, along with approvals from the FCC (USA), CRTC (Canada) and TDRA (UAE).
How Do You Launch a White-Label eSIM in Singapore?
Please note that not every business needs a full API build. With Zetexa, there are five ways to launch:
- eSIM API: Everything runs through five APIs and webhooks, and it typically goes live in 2 to 4 weeks.
- App SDK: Ready code to add eSIM buying and activation inside your app.
- White-label microsite: A ready eSIM store in your brand, which can go live within days.
- Reseller portal: For travel agents and distributors in Singapore who want to start as an eSIM reseller, with markups and wallet payments.
- WhatsApp bot: Your customers can buy and manage their plans inside WhatsApp.
In most cases, there are no set-up, platform or API fees, and no exclusivity. Wego, the travel marketplace founded in Singapore, and the fintech Niyo already sell eSIM on Zetexa. You can read how they launched in our Wego case study and Niyo case study.
Launch Branded Travel eSIM With Zetexa
It is evident that Singapore's travellers would rather buy data from the bank, wallet or travel app they already trust. With Zetexa, you can offer them travel eSIM and airport services under your own name, through one API. Book a demo with our partner team today!
Frequently Asked Questions
What is an eSIM API?
An eSIM API is a set of connections that lets an app or website sell, deliver and manage eSIMs automatically. The business sells the plan, while the provider creates the eSIM, sends it and tracks usage.
What is a white-label eSIM?
A white-label eSIM is a travel eSIM sold under a business's own brand. The business keeps the customer and sets the price, whereas the provider runs the networks, eSIM profiles and support.
How long does it take to integrate an eSIM API?
With Zetexa, an API integration typically takes 2 to 4 weeks. A white-label microsite or reseller portal can go live within days.
Can a Singapore OTA sell eSIMs to visitors coming to Singapore?
Yes. A Singapore OTA or super-app can sell eSIMs for Singapore to inbound visitors, as well as eSIMs for 200+ destinations to residents travelling abroad.
Can Singapore businesses price eSIM plans in SGD?
Yes. Partners set their own retail prices, and Zetexa's platform supports multiple currencies and payment gateways.
Can I sell airport lounge access and eSIM through one API?
Yes. Zetexa sells lounge access, fast track and meet and greet through the same API as its eSIM plans, so both can be offered at the same checkout.
What should a Singapore bank check before adding a travel eSIM provider?
A bank should check the provider's audit reports, such as SOC 2 Type II, how customer data is handled under the PDPA, network coverage in its customers' top destinations and the support model when an eSIM fails abroad.
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