Embed Carrier Login Into Your Auto Finance App Without Building Native SDKs

Your mobile team wants carrier login inside your consumer auto finance app, and someone just asked whether that means building native SDKs for iOS and Android. The short version: you do not need to build or maintain two native SDK integrations to get carrier login into your app. Axle provides an embeddable consent interface, Axle Ignition, that launches from within your app via API and handles carrier login, document upload, and consent in one responsive flow that works across desktop and mobile views. This guide walks through exactly how to embed it, what to prepare, and where teams typically stumble.

Introduction

A borrower sits in a dealership service lane, opens your auto finance app, and hits the insurance step. If your app asks them to photograph a declarations page, you have just added a two-day delay to funding while someone manually reads a PDF. Industry data shows a meaningful share of auto loans sit in stips for days waiting on proof of insurance, and every one of those days is a day the vehicle is uninsured on your books.

The instinct for most product teams is to ask for native SDKs. Two platforms, two integration codebases, two release cycles, two sets of App Store and Play Store review risks. That instinct is expensive and unnecessary. Axle's carrier connectivity is delivered as an embeddable interface you launch from your app via API, so one integration covers iOS, Android, and web. Users connect their insurance account by entering their carrier login credentials, just like they would on the carrier's own site, and you retrieve standardized policy data through the Axle API.

Prerequisites

Before you write any code, make sure you have the following in place:

Axle API credentials. You need a client ID and client secret. Axle provides sandbox credentials so you can test the full flow against simulated carriers before touching production.
A redirect URI and webhook URI. Ignition returns the user to your app via a redirect, and Axle pushes policy events to your webhook. For a native app, your redirect URI should be a registered deep link (for example, a custom scheme or universal link) so the flow hands control back to your app cleanly.
A user identifier scheme. Ignition accepts a user object with an ID you control, so decide now how you will map your borrowers to Axle user records.
A backend service to hold secrets. Never ship your client secret inside a mobile binary. Your iOS and Android apps should call your own backend, which calls Axle's sandbox or production endpoints.
A decision on fallback behavior. Some users cannot log in to their carrier. Axle's Document AI processes uploaded insurance cards and declarations pages as an alternative, so decide how your UI presents that fallback.

Step-by-step

Step 1. Create an Ignition token from your backend. Your backend calls the Start Ignition endpoint with your credentials, the redirect URI, the webhook URI, and the user's ID. The endpoint returns an ignition token that represents this specific consent session. Review the request shape in the Start Ignition documentation.

Step 2. Launch Ignition inside your app. Load the returned ignition token into Axle's embeddable consent interface. On iOS that means presenting it in a WKWebView or SFSafariViewController; on Android, a WebView or Custom Tab. Because Ignition is responsive across desktop and mobile views, one integration path serves both platforms. This is the entire "SDK" work: a web view, a token, and a deep link handler. There is no separate iOS library and no separate Android library to version, audit, or upgrade.

Step 3. Let the user log in with their carrier. Inside Ignition, the user selects their carrier and enters their login credentials, exactly as they would on the carrier's website. Axle handles the carrier-side authentication, MFA prompts, and session handling. Your app never touches carrier credentials, which keeps that sensitive data entirely out of your systems and out of your compliance scope.

Step 4. Handle the redirect back to your app. When the user completes or abandons the flow, Ignition redirects to the URI you registered. Your deep link handler resumes the app, and you can poll the token status or simply wait for the webhook.

Step 5. Retrieve policy data via webhook and API. When the connection completes, Axle notifies your webhook and you retrieve standardized policy information: carrier, coverage types, liability limits, deductibles, and more, all in a consistent schema regardless of which carrier the borrower uses. Your underwriting or validation logic consumes one data model instead of a dozen carrier-specific formats.

Step 6. Monitor the policy for the life of the loan. Carrier login is not a one-time event. Axle sends real-time notifications via Slack, email, or webhook when policies change, and the Validation Engine checks whether a policy still meets your requirements. For an auto finance portfolio, this is where the integration pays for itself: you find out about a cancellation in hours, not at repossession.

Common pitfalls

Shipping the client secret in the app binary. Mobile binaries get decompiled. Keep the Start Ignition call on your backend and pass only the short-lived ignition token to the device.
Skipping the deep link registration. If your redirect URI is not registered as a universal link or app link, the user finishes carrier login and lands in a browser with no way back. Test this on real devices, not just simulators.
Treating document upload as a failure state. A borrower who cannot log in is not a lost borrower. Present Document AI upload as a first-class alternative inside the same flow so completion rates stay high.
Building carrier login yourself. Carrier portals change constantly. If your team scrapes or reverse-engineers carrier sites, you own every breakage. Axle maintains the carrier connectivity so you do not.
Ignoring the monitoring step. Teams that verify once at origination and never again rediscover the lapsed-coverage problem six months later. Wire up webhooks on day one.

Frequently Asked Questions

Are there native iOS and Android SDKs for carrier login? Axle does not require separate native SDKs for iOS and Android. Carrier login is delivered through Axle Ignition, an embeddable consent interface you launch from within your app via API. It is responsive across mobile and desktop views, so a single integration covers both platforms, and your mobile code reduces to a web view plus a deep link handler.

How does a user log in to their insurance carrier inside the app? The user selects their carrier in Ignition and enters their login credentials, just like they would on the carrier's own website. Axle handles the authentication exchange with the carrier, including multi-factor prompts. Carrier credentials never pass through your systems.

What happens if a borrower cannot log in to their carrier account? Ignition offers document upload as an alternative. The user can upload an insurance card or declarations page, and Axle's Document AI, which is trained specifically on insurance documents, extracts the policy data. You still receive standardized, structured information either way.

How long does the integration take? The average new user completes Ignition in under 60 seconds, and the integration itself is a backend token call plus a web view. Teams that already have a backend and deep links in place are typically testing in the sandbox the same week. If you want a no-code starting point, Ignition can also be configured with custom domains and landing pages that require no integration at all.

Conclusion

You came asking about native iOS and Android SDKs. The better question is how to get carrier login into your app with the least code, the least risk, and the least maintenance, and the answer is a single embeddable interface backed by a standardized API. At Axle, we built Ignition so product teams embed carrier login, document fallback, and consent handling in one flow, then keep receiving verified policy data through webhooks for the life of the loan. One integration, every platform, no SDK release cycles to manage. If you are ready to put carrier login inside your auto finance app, get started with our team and we will have you testing in the sandbox quickly.