From Legacy SOAP to Modern REST: Migrating Identity Verification

Assess Current StateBegin by thoroughly auditing your existing SOAP-based identity verification systems, identifying dependencies, data structures, and business logic to form a clear migration roadmap.

Design for ModernityEmbrace REST principles, statelessness, and JSON payloads, prioritizing modularity and scalability to build a more resilient and flexible identity verification architecture.

Phased Migration StrategyImplement a gradual transition using strategies like proxy layers or parallel running, allowing for continuous testing and minimizing disruption to critical operations during the migration.

Leverage AI-Native SolutionsDidit offers an AI-native, developer-first platform with modular REST APIs for seamless integration, including Free Core KYC, allowing for rapid deployment and future-proof identity verification.

The Imperative for Modernizing Identity Verification APIs

In today's fast-paced digital economy, robust yet agile identity verification is not just a compliance requirement but a competitive advantage. Many organizations, however, find themselves shackled by legacy integrations, particularly those built on SOAP (Simple Object Access Protocol) APIs. While SOAP served its purpose, its verbosity, complexity, and tight coupling make it ill-suited for the demands of modern, scalable, and real-time identity verification. The shift towards REST (Representational State Transfer) APIs offers significant benefits: improved performance, easier integration, greater flexibility, and a more developer-friendly experience.

Migrating from SOAP to REST is more than just a technical upgrade; it's an opportunity to re-architect your identity verification processes for enhanced efficiency, better user experience, and reduced operational overhead. This playbook will guide you through the essential steps to successfully transition your identity verification integrations, ensuring your systems are ready for the future.

Phase 1: Assessment and Planning – Understanding Your Current Landscape

Before embarking on any migration, a thorough understanding of your existing SOAP-based identity verification ecosystem is paramount. This initial phase is about discovery and meticulous planning:

• Audit Existing Integrations: Document every SOAP endpoint, the data exchanged (XML schemas), and the business logic tied to each call. Identify which verification checks are performed (e.g., ID Verification, AML Screening, Proof of Address) and how they integrate into your user onboarding or transaction flows.
• Identify Dependencies: Map out all internal and external systems that interact with your SOAP identity verification services. This includes front-end applications, back-end services, databases, and third-party partners. Understanding these dependencies is crucial for minimizing disruption.
• Define Requirements for the New System: What are your current pain points with SOAP? What new capabilities do you need? Consider aspects like performance, scalability, security, data privacy, and ease of integration. For example, if you're looking to implement real-time fraud prevention, you'll need a REST API that supports rapid Passive & Active Liveness checks and 1:1 Face Match & Face Search. If age verification is a concern, a modern API should support privacy-preserving Age Estimation.
• Choose Your Target REST API: Evaluate potential REST-based identity verification providers. Look for platforms that offer comprehensive coverage for your needs, such as Didit's modular suite of products (ID Verification, AML Screening, Phone & Email Verification, NFC Verification). Prioritize providers with clear documentation, SDKs, and a developer-first approach.

Phase 2: Design and Development – Building the New Integration

With a clear understanding of your requirements, the next phase focuses on designing and developing your new REST-based integration. This is where you leverage the advantages of modern API design:

• Embrace RESTful Principles: Design your new API interactions around resources, using standard HTTP methods (GET, POST, PUT, DELETE) and stateless communication. Utilize JSON for data exchange, which is far lighter and more developer-friendly than XML.
• Modular Architecture: Modern identity verification platforms like Didit are built with modularity in mind. Instead of a monolithic SOAP service, you can now integrate specific functionalities as needed. For example, you might call an endpoint for ID Verification, then another for AML Screening, and a third for Proof of Address, orchestrating these checks into a seamless workflow. This flexibility allows for greater customization and easier updates.
• Security First: Implement robust security measures. REST APIs typically use API keys, OAuth 2.0, and JWTs for authentication and authorization. Ensure all communications are encrypted via HTTPS.
• Error Handling and Monitoring: Design comprehensive error handling mechanisms, utilizing standard HTTP status codes. Implement logging and monitoring to track API calls, responses, and potential issues, ensuring you can quickly diagnose and resolve problems.

Phase 3: Migration and Testing – A Smooth Transition

The actual migration from SOAP to REST should be a phased approach to minimize risk and disruption. Thorough testing is critical at every step:

• Pilot Program/Partial Rollout: Start by migrating a non-critical component or a subset of users. This allows you to test the new integration in a live environment, gather feedback, and fine-tune your processes without impacting your entire user base.
• Proxy Layer Strategy: In some cases, creating a proxy layer that translates legacy SOAP requests into new REST calls can be beneficial. This allows you to gradually replace the underlying SOAP services with REST without immediately altering all consuming applications.
• Parallel Running: Run both the old SOAP and new REST integrations simultaneously for a period. Compare results, performance, and reliability. This dual-run strategy provides a safety net and helps build confidence in the new system.
• Comprehensive Testing: Conduct unit tests, integration tests, performance tests, and security tests. Verify that all identity verification checks (e.g., ID Verification, Liveness, Face Match) are functioning correctly and that data is accurately processed and stored. Pay special attention to edge cases and error scenarios.
• Rollback Plan: Always have a detailed rollback plan in case unforeseen issues arise during the migration.

How Didit Helps

Didit is purpose-built for modern identity verification, making your migration from legacy SOAP to REST seamless and efficient. As an AI-native, developer-first platform, Didit provides an open, modular identity layer designed for composable identity checks. Our clean REST APIs and no-code Business Console allow you to orchestrate workflows and automate trust with unparalleled ease.

With Didit, you benefit from:

• Free Core KYC: Get started with essential identity verification without upfront costs, making it easier to experiment and integrate.
• Modular Architecture: Access a suite of powerful identity primitives, including ID Verification (OCR, MRZ, barcodes), Passive & Active Liveness, 1:1 Face Match & Face Search, AML Screening & Monitoring, Proof of Address, Age Estimation, and Phone & Email Verification. Our modular design means you only integrate what you need, reducing complexity.
• AI-Native Performance: Leverage cutting-edge AI for superior accuracy and speed in all verification processes, from document analysis to deepfake detection.
• Developer-First Experience: Enjoy instant sandbox access, comprehensive public documentation, and clean APIs that streamline integration. No setup fees mean you can focus on building, not bureaucracy.
• Orchestrated Workflows: Design complex verification journeys using a no-code editor, then launch them via secure verification links or embed them directly into your applications.

By choosing Didit, you're not just migrating APIs; you're upgrading to an identity platform that is global by design, scalable, and ready to meet the evolving demands of digital trust.

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