{"id":2517,"date":"2025-04-04T05:23:24","date_gmt":"2025-04-04T04:23:24","guid":{"rendered":"https:\/\/discovery.cevolution.co.uk\/ciam\/?p=2517"},"modified":"2025-10-28T11:41:56","modified_gmt":"2025-10-28T11:41:56","slug":"an-api-first-approach-to-ciam","status":"publish","type":"post","link":"https:\/\/discovery.cevolution.co.uk\/ciam\/2025\/04\/04\/an-api-first-approach-to-ciam\/","title":{"rendered":"An API-First Approach to CIAM"},"content":{"rendered":"<span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 5<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>\n<p>As discussed in my previous article (below), <span class=\"popup-trigger popmake-1185\" data-popup-id=\"1185\" data-do-default=\"0\">CIAM<\/span> plays a crucial role when it comes to building <span class=\"popup-trigger popmake-1354\" data-popup-id=\"1354\" data-do-default=\"0\">B2C<\/span> and <span class=\"popup-trigger popmake-418\" data-popup-id=\"418\" data-do-default=\"0\">B2B<\/span> SaaS applications, and integration typically requires the handling of a broad array of scenarios: ranging from user management and privacy concerns to scaling for millions of users and ensuring seamless integration across multiple platforms.<\/p>\n\n\n\n<div class=\"wp-block-group is-content-justification-center is-nowrap is-layout-flex wp-container-core-group-is-layout-23441af8 wp-block-group-is-layout-flex\">\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-discover-ciam wp-block-embed-discover-ciam\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"q4vS3hRl8T\"><a href=\"https:\/\/discovery.cevolution.co.uk\/ciam\/2025\/03\/09\/what-can-ciam-do-for-you\/\">What Can CIAM Do For You?<\/a><\/blockquote><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;What Can CIAM Do For You?&#8221; &#8212; Discover CIAM\" src=\"https:\/\/discovery.cevolution.co.uk\/ciam\/2025\/03\/09\/what-can-ciam-do-for-you\/embed\/#?secret=uJM2t1TyTT#?secret=q4vS3hRl8T\" data-secret=\"q4vS3hRl8T\" width=\"500\" height=\"282\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n<\/div>\n\n\n\n<p>Over time, managing change, rapid deployment, and continuous monitoring \u2014 as part of the software development lifecycle (SDLC) \u2014 have become increasingly important aspects too. <\/p>\n\n\n\n<p>My name&#8217;s <span class=\"popup-trigger popmake-378\" data-popup-id=\"378\" data-do-default=\"0\">Peter Fernandez<\/span>, and in this article, I&#8217;m going to discuss some of the fundamentals you need to consider and why you should take an API-first approach to Customer Identity &amp; Access Management.<\/p>\n\n\n\n<h2 id=\"what-is-an-apifirst-approach\" class=\"wp-block-heading\">What is an API-First Approach?<\/h2>\n\n\n\n<p>One of the most significant trends in modern software development is the adoption of an <strong>API-first approach<\/strong>. This is essentially where one or more <span class=\"popup-trigger popmake-2876\" data-popup-id=\"2876\" data-do-default=\"0\">APIs<\/span> are implemented to allow command, control and management of the various aspects of a software implementation.<\/p>\n\n\n\n<div class=\"wp-block-group has-base-color has-accent-4-background-color has-text-color has-background has-link-color wp-elements-d08ce1d1da081a74d0087bbc599f9a0f is-layout-flow wp-block-group-is-layout-flow\" style=\"border-radius:20px\">\n<p class=\"has-text-align-center\" style=\"padding-top:var(--wp--preset--spacing--40);padding-right:var(--wp--preset--spacing--40);padding-bottom:var(--wp--preset--spacing--40);padding-left:var(--wp--preset--spacing--40)\"><em>The term API \u2014 a.k.a. Application Program Interface \u2014 refers to the backend implementation that allows systems to communicate consistently via an HTTP interface.<\/em><\/p>\n<\/div>\n\n\n\n<p>The API-first approach is increasingly valuable in the context of <strong>CI\/CD<\/strong> (<strong>Continuous Integration<\/strong>\/<strong>Continuous Deployment<\/strong>) pipelines, too, where the ability to integrate with existing tooling provides for automated system configuration and management (as well as for self-service configuration and provisioning). In a CIAM context, an API-first approach is highly beneficial for several additional reasons:<\/p>\n\n\n\n<div class=\"wp-block-group has-base-color has-accent-4-background-color has-text-color has-background has-link-color wp-elements-7084ed79c351b3349bb75c87703ff08e is-layout-flow wp-block-group-is-layout-flow\" style=\"border-radius:20px\">\n<p class=\"has-text-align-center\" style=\"padding-top:var(--wp--preset--spacing--40);padding-right:var(--wp--preset--spacing--40);padding-bottom:var(--wp--preset--spacing--40);padding-left:var(--wp--preset--spacing--40)\"><em>In a CIAM context, adopting an API-first approach typically means leveraging some application-independent <span class=\"popup-trigger popmake-415\" data-popup-id=\"415\" data-do-default=\"0\">IdP<\/span> and\/or Authorization Server implementation via an API.<\/em><\/p>\n<\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Decoupled Development<\/strong>: By focusing on leveraging API-first CIAM services, like an <span class=\"popup-trigger popmake-415\" data-popup-id=\"415\" data-do-default=\"0\">IdP<\/span>, as part of the development architecture, teams can develop independent (micro) services or components that interact through well-defined interfaces. This is particularly pertinent where standards-based protocols like <span class=\"popup-trigger popmake-407\" data-popup-id=\"407\" data-do-default=\"0\">OIDC<\/span> and <span class=\"popup-trigger popmake-467\" data-popup-id=\"467\" data-do-default=\"0\">OAuth 2.0<\/span> are used, reducing the complexity of maintaining tightly coupled systems and enabling easier updates or replacements of components.<\/li>\n\n\n\n<li><strong>Consistency Across Platforms<\/strong>: APIs offer a uniform interface for integrating with multiple platforms, whether it&#8217;s a web application, mobile app, or third-party services. A standards-based API-first approach provides a consistent way to interact with a CIAM implementation, ensuring that changes in one environment don\u2019t impact integration with others.<\/li>\n\n\n\n<li><strong>Faster Releases<\/strong>: With an API-first approach, incorporating CIAM features for user authentication and authorization means that integration can be implemented, tested, and deployed independently. This aligns with CI\/CD best practices, enabling faster iteration and a more reliable deployment pipeline; new features or updates to a CIAM implementation can be rolled out incrementally, reducing the risk of downtime or disruptions.<\/li>\n\n\n\n<li><strong>Improved Security and Compliance<\/strong>: Security policies and compliance checks are crucial in a CIAM system. With an API-first approach, the security requirements (such as encryption, <span class=\"popup-trigger popmake-428\" data-popup-id=\"428\" data-do-default=\"0\">MFA<\/span>, <a href=\"https:\/\/discovery.cevolution.co.uk\/ciam\/authorize\/access-control\/\" data-type=\"page\" data-id=\"509\" target=\"_blank\" rel=\"noreferrer noopener\">Access Control<\/a>, etc.) can be baked in, particularly when using standards like <span class=\"popup-trigger popmake-467\" data-popup-id=\"467\" data-do-default=\"0\">OAuth 2.0<\/span>. This also makes auditing and compliance tracking more straightforward, as security protocols can be tested and enforced consistently across all integrations.<\/li>\n\n\n\n<li><strong>Easier Integration and Extensibility<\/strong>: An API-first design allows for easier integration with new tools, services, or third-party applications. In environments where a toolchain often evolves rapidly, the ability to quickly integrate new capabilities, especially those that leverage CIAM, without major overhauls, is crucial.<\/li>\n\n\n\n<li><strong>Support for Service Architectures<\/strong>: Many <span class=\"popup-trigger popmake-2946\" data-popup-id=\"2946\" data-do-default=\"0\">SaaS<\/span> vendors adopt a (micro) services architecture, and APIs are typically regarded as the foundation for this. By leveraging APIs, CIAM systems can be integrated into a broader ecosystem of microservices that support user authentication, identity verification, and access control. This modular approach allows for better scalability, flexibility, and fault tolerance\/isolation.<\/li>\n<\/ul>\n\n\n\n<h2 id=\"key-scenarios\" class=\"wp-block-heading\">Key Scenarios<\/h2>\n\n\n\n<p>The first point of interaction a user typically has with a CIAM system is through the process of (interactive) authentication \u2014 i.e. a process which typically includes Registration and <span class=\"popup-trigger popmake-1437\" data-popup-id=\"1437\" data-do-default=\"0\">Login<\/span>. But CIAM goes beyond just the authentication process: authorisation and management are also key aspects of a CIAM solution that need to be addressed, and an API-first approach makes that a lot easier to achieve.<\/p>\n\n\n\n<h3 id=\"authentication\" class=\"wp-block-heading\">Authentication<\/h3>\n\n\n\n<p>Login and registration scenarios might involve the use of <a data-type=\"page\" data-id=\"1136\" href=\"https:\/\/discovery.cevolution.co.uk\/ciam\/authenticate\/login\/federation\/\" target=\"_blank\" rel=\"noreferrer noopener\">Federation<\/a> and\/or <span class=\"popup-trigger popmake-523\" data-popup-id=\"523\" data-do-default=\"0\">Social<\/span> providers, where users can sign in using their credentials from corporate <span class=\"popup-trigger popmake-415\" data-popup-id=\"415\" data-do-default=\"0\">IdPs <\/span>or platforms like Google or Facebook. <\/p>\n\n\n\n<p>Such identity scenarios can be complex, particularly with federation, which typically involves establishing trust relationships with various identity providers and managing different standards for authentication (i.e. <span class=\"popup-trigger popmake-470\" data-popup-id=\"470\" data-do-default=\"0\">SAML<\/span> and <span class=\"popup-trigger popmake-407\" data-popup-id=\"407\" data-do-default=\"0\">OIDC<\/span>) \u2014 and will likely involve the capture of potentially sensitive user data (such as name, email, age, etc.). <\/p>\n\n\n\n<p>Consider, too, cases where multiple authentication mechanisms such as Single Sign-On (<span class=\"popup-trigger popmake-397\" data-popup-id=\"397\" data-do-default=\"0\">SSO<\/span>), Multi-Factor Authentication (<span class=\"popup-trigger popmake-428\" data-popup-id=\"428\" data-do-default=\"0\">MFA<\/span>), and even biometric authentication need to be handled as part of the strategy.<\/p>\n\n\n\n<div class=\"wp-block-group has-base-color has-accent-4-background-color has-text-color has-background has-link-color wp-elements-4c5e81f46490819a4e40a1fa8c38ea63 is-layout-flow wp-block-group-is-layout-flow\" style=\"border-radius:20px\">\n<p class=\"has-text-align-center\" style=\"padding-top:var(--wp--preset--spacing--40);padding-right:var(--wp--preset--spacing--40);padding-bottom:var(--wp--preset--spacing--40);padding-left:var(--wp--preset--spacing--40)\"><em>Whilst the capture of user data is more common during registration, Progressive Profiling, often used as part of the Login process, means that user data capture can occur as part of user authentication too.<\/em><\/p>\n<\/div>\n\n\n\n<p>An API-first approach offered by a CIAM <span class=\"popup-trigger popmake-415\" data-popup-id=\"415\" data-do-default=\"0\">IdP<\/span> allows authentication services to be exposed to the various clients \u2014 e.g. mobile apps, web applications, and third-party platforms \u2014 that make up a SaaS solution while maintaining a consistent experience across all user interactions. <\/p>\n\n\n\n<p>Leveraging an API-first approach to integrate different authentication methods and protocols (e.g., <span class=\"popup-trigger popmake-467\" data-popup-id=\"467\" data-do-default=\"0\">OAuth 2.0<\/span>, <span class=\"popup-trigger popmake-407\" data-popup-id=\"407\" data-do-default=\"0\">OIDC<\/span> and\/or <span class=\"popup-trigger popmake-470\" data-popup-id=\"470\" data-do-default=\"0\">SAML<\/span>) makes developing an implementation easier and more flexible, ensuring a smooth, secure, and scalable way of managing external authentication sources.<\/p>\n\n\n\n<div class=\"wp-block-group has-base-color has-accent-4-background-color has-text-color has-background has-link-color wp-elements-b444730e2e38f9b60165bfd72cd8549a is-layout-flow wp-block-group-is-layout-flow\" style=\"border-radius:20px\">\n<p class=\"has-text-align-center\" style=\"padding-top:var(--wp--preset--spacing--40);padding-right:var(--wp--preset--spacing--40);padding-bottom:var(--wp--preset--spacing--40);padding-left:var(--wp--preset--spacing--40)\"><em>For B2C and B2B SaaS, the use of OIDC within the application is the recommended approach for authentication, leveraging a protocol that&#8217;s already API-first by design.<\/em><\/p>\n<\/div>\n\n\n\n<h3 id=\"authorization\" class=\"wp-block-heading\">Authorization<\/h3>\n\n\n\n<p>A crucial aspect of CIAM is ensuring that the right users have access to the right resources at the right time based on their privileges; in a complex system, users can have varying roles and\/or relationships, each with a varying set of permissions. Managing these and ensuring that users are granted access to only the resources they need is key to both security and a seamless user experience.<\/p>\n\n\n\n<p>OAuth 2.0 provides an API-first approach to authorisation by design. Not only does it support secure access to your own APIs, with user consent, but it also paves the way for enabling access control via mechanisms such as <span class=\"popup-trigger popmake-1623\" data-popup-id=\"1623\" data-do-default=\"0\">RBAC<\/span>, <span class=\"popup-trigger popmake-2333\" data-popup-id=\"2333\" data-do-default=\"0\">ReBAC<\/span> and ABAC. <\/p>\n\n\n\n<p>An API-first CIAM integration leveraging OAuth 2.0 offers flexibility in creating, assigning, and managing privileges across different systems and applications, and ensures that roles, relationships, and\/or associated attributes can be integrated and synchronised across multiple services and applications \u2014 improving consistency and reducing complexity.<\/p>\n\n\n\n<h3 id=\"management\" class=\"wp-block-heading\">Management<\/h3>\n\n\n\n<p>One aspect of a CIAM solution is system management, as in the deployment and control of configuration policies and updates, in an automated fashion, providing integration convenience and reducing the risk of errors. <\/p>\n\n\n\n<p>Another aspect is user management, and user profile management in particular. User profiles must not only store information required for authentication, but typically also extend to storing preferences, security settings, and potentially the consent data for the purpose of regulatory compliance and informing interactive UX.<\/p>\n\n\n\n<p>A robust API-first CIAM integration would not only allow information to be safely and securely managed by customer services\/administration personnel but would also allow a consumer to update or delete their profile information in a self-service fashion, again with secure processes for ensuring that changes are logged and validated. <\/p>\n\n\n\n<p>The use of APIs plays a crucial role in maintaining accuracy and consistency across multiple touch points, ensuring that changes made in one part of the system, like an update to an email address, say, propagate correctly to other parts of the infrastructure.<\/p>\n\n\n\n<div class=\"wp-block-group is-content-justification-center is-nowrap is-layout-flex wp-container-core-group-is-layout-23441af8 wp-block-group-is-layout-flex\">\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-discover-ciam wp-block-embed-discover-ciam\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"HISJ2Ez63p\"><a href=\"https:\/\/discovery.cevolution.co.uk\/ciam\/2025\/03\/25\/the-benefits-of-self-service-user-profile-management\/\">The Benefits of Self-Service User Profile Management<\/a><\/blockquote><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;The Benefits of Self-Service User Profile Management&#8221; &#8212; Discover CIAM\" src=\"https:\/\/discovery.cevolution.co.uk\/ciam\/2025\/03\/25\/the-benefits-of-self-service-user-profile-management\/embed\/#?secret=2n9dAX2wmY#?secret=HISJ2Ez63p\" data-secret=\"HISJ2Ez63p\" width=\"500\" height=\"282\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n<\/div>\n\n\n\n<h4 id=\"scalability\" class=\"wp-block-heading\">Scalability<\/h4>\n\n\n\n<p>SaaS platform solutions often require CIAM integrations that need to be scalable and capable of handling large volumes of users and requests; B2B SaaS solutions have the added complexity of needing to support a multi-tenancy approach when it comes to user communities. <\/p>\n\n\n\n<p>As the user base grows, so do the complexities related to managing data, authentication, and access control. In B2B solutions, CIAM integrations must also be capable of supporting tenants with different security needs, such as varying MFA policies or compliance regulations.<\/p>\n\n\n\n<p>An API-first design is essential in handling scalability, particularly in multi-tenant scenarios, providing a consistent way to manage specific configurations, user groups, and data access policies. It also allows for the rapid scaling of a system, as APIs can be accessed by any component or service without the need for complicated integrations.<\/p>\n\n\n\n<h4 id=\"compliance\" class=\"wp-block-heading\">Compliance<\/h4>\n\n\n\n<p>Privacy regulations such as <span class=\"popup-trigger popmake-399\" data-popup-id=\"399\" data-do-default=\"0\">GDPR<\/span> (General Data Protection Regulation) and CCPA (California Consumer Privacy Act) have made it essential for organisations to manage customer consent and ensure that user data is handled appropriately. <\/p>\n\n\n\n<p>A CIAM integration needs to facilitate the management of consent for various data processing activities, like using personal data for marketing, third-party sharing, or product improvements, and the ability to delete or anonymise user data upon request (ensuring that a user\u2019s privacy is honoured), requires close integration between the CIAM system and the other parts of the technology stack.<\/p>\n\n\n\n<p>In such cases, an API-first approach enables easier integration of consent management with other internal systems, such as marketing platforms or third-party analytics tools, so that when a user changes their preferences or requests data deletion, those changes can be synchronised across the entire infrastructure.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Customer Identity and Access Management (CIAM) involves addressing a variety of scenarios in an increasingly complex digital landscape. Adopting an API-first approach offers several advantages, particularly when it comes to integrating with your existing management systems and doing so in the context of Continuous Integration (CI) and Continuous Deployment (CD).<\/p>\n","protected":false},"author":1,"featured_media":2610,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"authenticate":"","authentication":"","authenticatedMethod":"","authenticatedMember":"","authorizedPermissions":[],"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"_links_to":"","_links_to_target":""},"categories":[7],"tags":[61,22,73],"class_list":["post-2517","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-integration","tag-apifirstmanagement","tag-ciam","tag-management"],"aioseo_notices":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/discovery-bucket-ha60ib.s3.eu-west-2.amazonaws.com\/wp-content\/uploads\/sites\/22\/2025\/04\/04052252\/create-a-highly-detailed-high-resolution-image-illustrating-the-concept-of.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/discovery.cevolution.co.uk\/ciam\/wp-json\/wp\/v2\/posts\/2517","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/discovery.cevolution.co.uk\/ciam\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/discovery.cevolution.co.uk\/ciam\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/discovery.cevolution.co.uk\/ciam\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/discovery.cevolution.co.uk\/ciam\/wp-json\/wp\/v2\/comments?post=2517"}],"version-history":[{"count":36,"href":"https:\/\/discovery.cevolution.co.uk\/ciam\/wp-json\/wp\/v2\/posts\/2517\/revisions"}],"predecessor-version":[{"id":4973,"href":"https:\/\/discovery.cevolution.co.uk\/ciam\/wp-json\/wp\/v2\/posts\/2517\/revisions\/4973"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/discovery.cevolution.co.uk\/ciam\/wp-json\/wp\/v2\/media\/2610"}],"wp:attachment":[{"href":"https:\/\/discovery.cevolution.co.uk\/ciam\/wp-json\/wp\/v2\/media?parent=2517"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/discovery.cevolution.co.uk\/ciam\/wp-json\/wp\/v2\/categories?post=2517"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/discovery.cevolution.co.uk\/ciam\/wp-json\/wp\/v2\/tags?post=2517"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}