Open Banking APIs

Open Banking (OB) isn’t a feature - it’s the blueprint for banks to stay relevant in an APIsed economy. But exposing a few APIs is not innovation. Here's what really powers OB - and some myth busting. OB is reshaping how we access and interact with financial services. At its core, it’s about unlocking data and making it securely available through modern infrastructure rails called APIs. But the impact goes far beyond banking. OB is becoming the key enabler of today’s two most dominant business models: —   Platform economics —   Embedded finance Banks play a critical role in this shift - because they hold the data. Enter: 𝗢𝗽𝗲𝗻 𝗕𝗮𝗻𝗸𝗶𝗻𝗴 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 This is the invisible technical foundation that allows banks to expose data and services to fintechs and partners. Here’s a simplified breakdown of key components: 1. API Gateway – The secure front door that handles requests and and routes them properly. 2. Consent & Identity Management – Ensures only the right parties get access, with the customer’s permission. 3. Authentication Layer – Uses secure login methods to confirm the customer’s identity. 4. Developer Portal – A gateway where third parties discover, test, and onboard to the bank’s APIs. 5. Microservices Layer – Breaks banking functions into modular services for faster, flexible delivery. 6. Core System Integration – Connects modern APIs to banks’ legacy systems without needing to rebuild everything from scratch. This isn’t just about technology - it’s about designing trust at scale. 𝗛𝗼𝘄 𝗮𝗻 𝗢𝗽𝗲𝗻 𝗕𝗮𝗻𝗸𝗶𝗻𝗴 𝗿𝗲𝗾𝘂𝗲𝘀𝘁 𝘄𝗼𝗿𝗸𝘀: 1.     A licensed third-party provider (TPP) sends an API request to the bank to access account data or initiate a payment. 2.     The end-user is redirected to the bank’s interface to authenticate and provide consent. 3.     Once consent is verified, the bank issues a secure access token to the TPP. 4.     The TPP retrieves only the authorized data or completes the payment transaction. 5.    All actions are logged for traceability, audit, security and compliance purposes. 𝗪𝗵𝗮𝘁’𝘀 𝗵𝗼𝗹𝗱𝗶𝗻𝗴 𝗯𝗮𝗻𝗸𝘀 𝗯𝗮𝗰𝗸? 1. Legacy tech – Many core platforms were never built for external connectivity. 2. Security & compliance pressure – Exposing APIs while meeting regulatory requirements is complex. 3. Real-time readiness – Open Banking requires real-time availability and minimal downtime. 4. Governance and ecosystem management – Managing third-party access and maintaining oversight is operationally demanding. Banks should avoid treating OB as just a tech upgrade or a compliance checkbox. It’s a strategic opportunity to modernize infrastructure - something they would have to do anyway. In the era of AI and real-time digital ecosystems, not being able to communicate via APIs is like owning a smartphone without internet access. Opinions: my own, Graphic source: Blanc Labs 𝐒𝐮𝐛𝐬𝐜𝐫𝐢𝐛𝐞 𝐭𝐨 𝐦𝐲 𝐧𝐞𝐰𝐬𝐥𝐞𝐭𝐭𝐞𝐫: https://lnkd.in/dkqhnxdg

Let's learn how Plaid works 👉 Source https://lnkd.in/dGkjU6PX Plaid’s magic lies in making complex integrations feel simple. When you “link” your bank account via Plaid, it begins with Plaid Link—the secure widget that lets you select a bank and authenticate. Depending on the bank, you’ll either input credentials directly or get redirected via OAuth. These credentials never touch the fintech app. Plaid encrypts them and establishes the connection behind the scenes. The app receives only a secure token (called an “item”) to make future API calls—ensuring a strong security barrier. Behind the curtain, Plaid connects to banks using a mix of open banking APIs, formal data agreements, and, in some cases, credential-based scraping. It has signed tokenized data-sharing deals with major U.S. banks like Chase and Wells Fargo. For smaller institutions, secure screen-scraping was historically used but is slowly being phased out in favor of API access, often via FDX in North America. Plaid maintains connectivity to over 12,000 institutions—no small feat given their varying systems and multi-factor authentication flows. Plaid essentially acts as a translator between these systems and its developer-friendly API, normalizing everything—whether pulled from a legacy mainframe or a sleek open banking endpoint—into consistent, usable JSON. Plaid’s API is RESTful and JSON-based, with endpoints like /auth/get or /transactions/get. Developers authenticate using API keys and tokens linked to each user’s “item.” Webhooks alert apps to updates like new transactions, so no constant polling is needed. With SDKs, a sandbox environment, and solid documentation, Plaid has become a favorite among engineers—by 2018, it powered 80% of major U.S. fintech apps, largely because it replaces countless custom integrations with one. Security is foundational. Plaid runs on secure cloud infrastructure, complies with ISO 27001, SOC 2, and encrypts all data at rest (AES-256) and in motion (TLS 1.2+). Credentials are encrypted and often discarded once API tokens are issued. Plaid also enforces multi-factor authentication, either by triggering the bank’s 2FA or offering its own fallback. A 24/7 security operations center, real-time monitoring, and a long-standing bug bounty program reinforce trust. Consumers can manage their connections via the Plaid Portal, seeing which apps have access and revoking them at will. Critically, Plaid doesn’t sell or share personal data without permission. Scaling this infrastructure is a feat in itself. Plaid boasts 99.99% uptime, with real-time queries, caching strategies, and smart data refresh intervals. For example, balances are fetched in real time; transactions typically update daily. Plaid also handles routing, login errors, MFA challenges, and data cleanup, so apps receive clean, structured information. The simplicity fintech users see masks a deep, complex engine. #payments #openbanking

𝐖𝐡𝐚𝐭 𝐢𝐬 𝐎𝐩𝐞𝐧 𝐁𝐚𝐧𝐤𝐢𝐧𝐠 — 𝐚 𝐧𝐞𝐰 𝐢𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞 𝐥𝐚𝐲𝐞𝐫 𝐟𝐨𝐫 𝐩𝐚𝐲𝐦𝐞𝐧𝐭𝐬 👇 Open Banking is not a product and not a new type of bank. It’s an API-based data and payment layer that allows customers — individuals or businesses — to securely share their bank data with third-party applications, only with explicit consent. Instead of financial data being locked inside one institution, it becomes portable, permissioned, and usable in real time. That shift is already changing how merchants handle payments, onboarding, and risk. — 𝐓𝐫𝐚𝐝𝐢𝐭𝐢𝐨𝐧𝐚𝐥 𝐁𝐚𝐧𝐤𝐢𝐧𝐠 𝐯𝐬 𝐎𝐩𝐞𝐧 𝐁𝐚𝐧𝐤𝐢𝐧𝐠 In traditional banking: → Customers interact directly with each bank → Data sits in silos → Every new service requires a new integration With Open Banking: → Customers authorize access once → APIs connect banks to fintech and merchant apps → Data and payments move securely between systems — 𝐇𝐨𝐰 𝐦𝐞𝐫𝐜𝐡𝐚𝐧𝐭𝐬 𝐮𝐬𝐞 𝐎𝐩𝐞𝐧 𝐁𝐚𝐧𝐤𝐢𝐧𝐠 𝐭𝐨𝐝𝐚𝐲 • Direct bank payments at checkout Merchants like Zalando and Ryanair enable account-to-account payments by connecting directly to banks such as ING, Santander, or BNP Paribas, reducing card fees, fraud exposure, and chargebacks. • Faster onboarding and credit decisions Platforms and marketplaces use live bank data from institutions like Barclays or HSBC to verify income, cash flow, and business activity — removing manual document uploads and accelerating approvals. • Real-time reconciliation and treasury visibility Large merchants and PSPs pull transaction and balance data directly from banks like JPMorganChase or Deutsche Bank to automate reconciliation, improve cash-flow forecasting, and reduce operational overhead. — 𝐓𝐡𝐞 𝐛𝐢𝐠𝐠𝐞𝐫 𝐩𝐢𝐜𝐭𝐮𝐫𝐞: Open Banking laid the groundwork for: → Open Finance → Embedded finance → Real-time payments → Programmable money flows The global Open Banking market is growing fast — with payments, value-added services, and data-driven products leading the expansion. A ~27% CAGR through 2030 isn’t hype; it reflects real adoption across banks, PSPs, and fintechs (DashDevs LLC) Open Banking didn’t replace banks. It opened the data layer — and merchants are already building on it. — Source: DashDevs LLC ► 𝐓𝐡𝐞 𝐏𝐚𝐲𝐦𝐞𝐧𝐭𝐬 𝐁𝐫𝐞𝐰𝐬: https://lnkd.in/g5cDhnjC ► Connecting the dots in Payments... | Marcel van Oost

Building an Open Banking Architecture 💡 In Open Banking, banks use an API messaging framework to securely share their customer data (with consent from customers) to third-party developers and service providers, which allows for automated and secure access to the data in their core banking environment. While Open Banking initially started as a regulatory requirement in the United Kingdom (UK) and other regions around the world, it has now transformed into a new revenue stream for banks, as they look to monetize their data and core functionality by exposing their core environment through APIs and building new business models such as Banking as a Service (BaaS) and embedded finance on top of the APIs. Open banking architectures supporting these use cases share the following characteristics: 🔹 Data is shared to third parties only after consent from the customer using OAuth 2.0. 🔹 Secure and limited third party access (with mutual Transport Layer Security (mTLS)). 🔹 API-driven infrastructure and an elastic and scalable environment. 🔹 Instant or near-instant access to customer account data. 🔹 Tamper-resistant logging and audit capabilities. Architecture description 1️⃣ A consumer accesses the licensed or accredited third-party application and provides consent to the third party to access consumer data or make a payment submission request. 2️⃣ Third parties in open banking can be defined as authorized institutions that provide value-added services in addition to the consumer's regular banking needs, such as accounts information (balance check, recent transactions, and statements) and payments (payment to merchants, people, and registered payees). This approach creates use cases such as spend analysis, credit decisioning, and payments for e-commerce transactions. 3️⃣ A trust service provider (TSP) is a trusted entity authorized by a supervisory government body to verify the authenticity of banks and third parties and issue digital certificates to third parties. 4️⃣ A bank's IT environment consists of its cloud environment and data centers. Source: Amazon Web Services (AWS) - https://t.ly/n6c1G #Innovation #Fintech #Banking #OpenBanking #EmbeddedFinance #BaaS #API #FinancialServices #Payments #Microservices #Cloud 

𝗪𝗵𝗮𝘁'𝘀 𝗗𝗿𝗶𝘃𝗶𝗻𝗴 𝘁𝗵𝗲 𝗚𝗹𝗼𝗯𝗮𝗹 𝗢𝗽𝗲𝗻 𝗕𝗮𝗻𝗸𝗶𝗻𝗴 𝗠𝗼𝘃𝗲𝗺𝗲𝗻𝘁? 🏦 Open Banking initiatives are reshaping finance worldwide. These frameworks aim to give consumers control over their financial data, foster competition, and enable innovation through standardized APIs. While the goals are similar, the execution and nuances vary by region, let's take a look 👇 𝗣𝗦𝗗𝟯 (𝗘𝗨) — 𝗧𝗶𝗴𝗵𝘁𝗲𝗿 𝗦𝗲𝗰𝘂𝗿𝗶𝘁𝘆, 𝗠𝗼𝗿𝗲 𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗦𝘁𝗮𝗻𝗱𝗮𝗿𝗱𝗶𝘇𝗮𝘁𝗶𝗼𝗻 ▪️𝗠𝗮𝗻𝗱𝗮𝘁𝗼𝗿𝘆 𝗔𝗣𝗜 𝗣𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 𝗠𝗲𝘁𝗿𝗶𝗰𝘀 → PSD3 will enforce specific uptime and availability standards for APIs, reducing merchant reliance on fallback mechanisms like screen scraping. ▪️𝗦𝘁𝗿𝗼𝗻𝗴𝗲𝗿 𝗦𝗖𝗔 𝗥𝗲𝗾𝘂𝗶𝗿𝗲𝗺𝗲𝗻𝘁𝘀 → New measures to authenticate payments and account access even more securely, tightening gaps left by PSD2. 𝗨𝗞’𝘀 𝗙𝘂𝘁𝘂𝗿𝗲 𝗘𝗻𝘁𝗶𝘁𝘆 — 𝗘𝘅𝗽𝗮𝗻𝗱𝗶𝗻𝗴 𝗯𝗲𝘆𝗼𝗻𝗱 𝗣𝗮𝘆𝗺𝗲𝗻𝘁𝘀 🔹𝗦𝘁𝗿𝗲𝗻𝗴𝘁𝗵𝗲𝗻𝗲𝗱 𝗟𝗶𝗮𝗯𝗶𝗹𝗶𝘁𝘆 𝗙𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸𝘀 → Greater clarity around who bears responsibility when third-party providers or banks mishandle data. 🔹𝗜𝗻𝘁𝗲𝗿𝗼𝗽𝗲𝗿𝗮𝗯𝗶𝗹𝗶𝘁𝘆 𝗙𝗼𝗰𝘂𝘀 → The UK Future Entity will prioritize ensuring that different industries beyond banking can interact seamlessly. 𝗨𝗦 𝗖𝗙𝗣𝗕 𝟭𝟬𝟯𝟯 𝗥𝘂𝗹𝗲 — 𝗖𝗼𝗻𝘀𝘂𝗺𝗲𝗿 𝗥𝗶𝗴𝗵𝘁𝘀 𝗔𝗯𝗼𝘃𝗲 𝗔𝗹𝗹 ▪️𝗖𝗼𝗻𝘀𝘂𝗺𝗲𝗿 𝗣𝗲𝗿𝗺𝗶𝘀𝘀𝗶𝗼𝗻𝗲𝗱 𝗔𝗰𝗰𝗲𝘀𝘀 → The emphasis is on giving consumers full control over which entities can access checking, mortgage, and credit card data. ▪️𝗦𝘁𝗮𝗻𝗱𝗮𝗿𝗱𝗶𝘇𝗮𝘁𝗶𝗼𝗻 𝗪𝗶𝘁𝗵𝗼𝘂𝘁 𝗖𝗲𝗻𝘁𝗿𝗮𝗹 𝗔𝘂𝘁𝗵𝗼𝗿𝗶𝘁𝘆 → Unlike PSD3, the US won't create a centralized technical standard. Instead, the market will drive API format innovation under CFPB oversight. 𝗢𝘁𝗵𝗲𝗿 𝗚𝗹𝗼𝗯𝗮𝗹 𝗠𝗼𝘃𝗲𝗺𝗲𝗻𝘁𝘀 🔹𝗖𝗮𝗻𝗮𝗱𝗮 → Open Banking framework development is underway, with full consumer-directed finance expected to launch this year. 🔹𝗦𝗶𝗻𝗴𝗮𝗽𝗼𝗿𝗲 → SGFinDex standardizes consent-driven financial data aggregation without mandating participation from every bank. 𝗦𝗶𝗺𝗶𝗹𝗮𝗿𝗶𝘁𝗶𝗲𝘀 𝗔𝗰𝗿𝗼𝘀𝘀 𝗥𝗲𝗴𝘂𝗹𝗮𝘁𝗶𝗼𝗻𝘀: ✔️𝗙𝗼𝗰𝘂𝘀 𝗼𝗻 𝗖𝗼𝗻𝘀𝘂𝗺𝗲𝗿 𝗖𝗼𝗻𝘁𝗿𝗼𝗹 → Across all markets, the central theme is empowering consumers with ownership over their financial data. ✔️𝗘𝗻𝗵𝗮𝗻𝗰𝗲𝗱 𝗟𝗶𝗮𝗯𝗶𝗹𝗶𝘁𝘆 𝗮𝗻𝗱 𝗦𝗲𝗰𝘂𝗿𝗶𝘁𝘆 → Frameworks are introducing stricter security measures and clarifying liability in case of breaches or misuse. 𝗞𝗲𝘆 𝗗𝗶𝗳𝗳𝗲𝗿𝗲𝗻𝗰𝗲𝘀: 📍𝗖𝗲𝗻𝘁𝗿𝗮𝗹𝗶𝘇𝗮𝘁𝗶𝗼𝗻 𝘃𝘀. 𝗠𝗮𝗿𝗸𝗲𝘁-𝗗𝗿𝗶𝘃𝗲𝗻 → The EU and UK push for heavy regulatory oversight, while the US takes a more decentralized, private sector-driven approach. 📍𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗦𝘁𝗮𝗻𝗱𝗮𝗿𝗱𝘀 → PSD3 will likely impose stricter technical performance standards compared to the US CFPB 1033 framework. Source: European Commission 🚨Follow Jason Heister for daily #Fintech and #Payments guides, technical breakdowns, and industry insights.