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IJARSCT
ISSN (Online) 2581-9429
International Journal of Advanced Research in Science, Communication and Technology (IJARSCT)
International Open-Access, Double-Blind, Peer-Reviewed, Refereed, Multidisciplinary Online Journal
Volume 5, Issue 1, March 2025
Copyright to IJARSCT DOI: 10.48175/IJARSCT-23633 199
www.ijarsct.co.in
Impact Factor: 7.67
API-First Banking: Evolution of Customer
Journey Analytics
Dyuti Dave
1
, Shubham Metha
2
, Nikhil Sagar Miriyala
3
, Anu Rai
4
, Prakhar Mittal
5
Technology Analyst, Barclays, USA
1
Software Engineer, Northwest Bank, USA
2
Senior Software Engineer, Oracle America Inc, Texas, USA
3
Technical Product Manager, Ph. D in Information Technology, M.S. in Information Technology and Management, USA
4
Manager Supply Chain, Deloitte USA
5
Abstract:
API-first banking is a novel approach to banking in the rapidly changing financial services
industry, with a focus on using Application Programming Interfaces (APIs) to improve customer journey
analytics and customer experience. Regulatory requirements, growing fintech competition, and banks' need
to adapt to the digital revolution are the main motivators. API-first banking is now a revolutionary model
that fundamentally changes how customer data is collected, analyzed, and responded to. This paper
examines how customer journey analytics evolved in API-first banking architectures, illustrating how the
shift from traditional banking architectures to API-based systems enabled it to gain unprecedented insights
into customer behavior and preferences. With analysis of real-world deployments at multiple banking
institutions, we demonstrate how API-first approaches facilitate real-time journey mapping, predictive
analytics, and tailored service delivery at scale. We also reveal key technical and organizational barriers to
API-first analytics adoption, including data governance complexity and cross-functional alignment
necessities. This research contributes to the current body of knowledge on digital banking revolution
through the presentation of a comprehensive framework for understanding how API-first approaches are
revolutionizing customer journey analytics and shaping the future of banking services. This research paper
aims to examine the revolution of customer journey analytics in the context of API-first banking, looking at
how banks are leveraging data and technology to enhance their understanding and delivery of services to
customers.
Keywords: API-first Banking; Customer Journey Analytics; Digital Banking; Financial Services
Technology; Banking Architecture.
I. INTRODUCTION
The banking industry has undergone a significant transformation in recent years, driven by the increasing adoption of
digital technologies and the evolving needs of customers. One of the key trends in this transformation is the shift
towards an "API-first" approach, where banks are leveraging application programming interfaces to enhance the
customer experience and streamline their operations[1,2].
This research paper highlights the transformative impact of APIs and open banking on the financial sector, particularly
in enhancing customer journey analytics and overall customer experience. APIs will be the digital tools that usher in a
new age of customer convenience, as regulatory changes like the Payment Services Directive (PSD2) in Europe and the
UK require banks to open up access to customer data to third parties [7]. PSD2 will be a catalyst for unprecedented
customer-oriented change, as banks and FinTechs leverage PSD2 opportunities to amend their operating, business, and
revenue models [8]. Open banking, enabled by APIs, provides the foundation for the concept of "embedded finance,"
where banks can embed their financial services into the products of non-bank companies, offering seamless processes
and increased convenience to customers [9]. The shift in the Japanese financial industry towards open APIs, which is
expected to be a powerful trigger for a value chain revolution in the banking and financial services industry [10].
Finally, the transformative impact of artificial intelligence (AI) in finance and banking, highlighting how AI can
enhance customer support, improve security through fraud detection, and increase the accuracy of credit scoring
IJARSCT
ISSN (Online) 2581-9429
International Journal of Advanced Research in Science, Communication and Technology (IJARSCT)
International Open-Access, Double-Blind, Peer-Reviewed, Refereed, Multidisciplinary Online Journal
Volume 5, Issue 1, March 2025
Copyright to IJARSCT DOI: 10.48175/IJARSCT-23633 200
www.ijarsct.co.in
Impact Factor: 7.67
through machine learning [11]. The emphasis on the value creation potential of AI in banking, including unlocking up
to $1 trillion of incremental value annually through personalized services and cost reduction via automation [11].
Finally, banks can improve customer journey analysis and the entire customer experience with API-first banking by
integrating AI and open banking. This will eventually result in innovation and industry growth.
Banking industry is poised for paradigm shift with changing customer requirements and advancements in technology.
The transformation is being ushered in by a new banking philosophy of architecture, called API-first banking, and it is
all about integration of services and open flow of data. APIs have arrived to revolutionize the way that financial
institutions construct more agile, integrated, and customer-centric services instead of monolithic bank systems that
dominated the industry previously.Customer journey analytics, previously constrained by batch processing and data silo
limitations, is now a key way of analyzing and enhancing the banking experience.Strong analytics combined with API-
first programming gives banks unparalleled chances to truly understand the demands, interests, and behavior of their
clients. Traditional transactional-based relationships can be transformed into more individualized, proactive, and
predictive services by banks because to the convergence of technology and customer information.The importance of
this change extends beyond the application of technology itself but a revolutionary change in the way banks engage
with and handle their customers. Banks must realize how API-first approaches affect customer journey analysis in order
to stay ahead of the competition and respond to their customers' mounting demands in the more digitalized financial
sector.To remain competitive and respond to growing customer demands in a burgeoning digital banking economy,
banks undergoing such development must learn how API-first practices influence customer journey analytics.
In this paper, we explore how customer journey analytics has evolved in the setting of API-first bank architectures,
covering both the technical foundations and day-to-day implications of the change. Through analysis of recent
deployments and developing trends, we examine in what ways API-first approaches are reshaping the potential of banks
to understand, serve, and anticipate customers' needs.
II. LITERATURE REVIEW
The digitalization of the financial institution has been a topic of growing interest in the literature. The article outlines
three different phases of the transformation, with each phase characterized by a collection of different challenges and
opportunities. The first phase is the digitalization of existing processes and the adoption of straightforward digital
technologies, e.g., online banking and mobile phones.
2.1 Phase 1: Basic Digital Transformation (2000-2010)
The initial stage of banking digitalization was everything about transforming legacy banking products to digital
products. During this phase, the banks were busy developing online banking websites and basic mobile apps. The phase
was marked by plain digitization of existing processes rather than a complete revamp of bank architecture. The
development of these online media, while revolutionary in their time, were made to operate in some form of silos with
little ability to provide end-to-end customer journey visibility.
2.2 Phase 2: Integrated Digital Services (2010-2018)
The second phase involved the transition to more integrated digital services. Banks began realizing the drawbacks of
siloed digital channels and turned to more integrated systems. In this phase there were middleware solutions that were
attempting to bridge the gap between traditional banking cores and new digital services. But these approaches also had
the side effect of generating complex architectural layers that, while functional, introduced new issues in data analysis
and maintenance.
2.3 Phase 3: API-First Banking (2018-Present)
The current period signifies a paradigm shift in bank system design and construction. The period is typified by
leveraging API-first systems in which interoperability and access to data is front and center at the point of inception.
This period to mark a period of bank architecture evolution from traditional to platform-type forms of it with higher
analytics of the customer journey as well as the capacity for processing in real time.
IJARSCT
ISSN (Online) 2581-9429
International Journal of Advanced Research in Science, Communication and Technology (IJARSCT)
International Open-Access, Double-Blind, Peer-Reviewed, Refereed, Multidisciplinary Online Journal
Volume 5, Issue 1, March 2025
Copyright to IJARSCT DOI: 10.48175/IJARSCT-23633 201
www.ijarsct.co.in
Impact Factor: 7.67
III. RESEARCH METHODOLOGY
This study applies the qualitative approach to examine the influence of API-first banking on customer journey
analytics. This study integrates case studies and industry observer perspectives through research reports with theory to
develop a composite image of the subject.
3.1 Data Collection Methods
As this study does not involve data collection in the first place, it is founded on secondary sources of data like research
studies, whitepapers, and published case studies by financial institutions. It is rather a matter of collating what is
available in an attempt to create insights into customer journey analytics transformation in API-first banking.
3.2 Sampling Strategy
The study follows a purposive sampling method, and literature and case studies employed here are most effective in
providing the reader with comprehensive information about API-led banking innovations. One of the key selection
criteria includes digital banking transformational relevance, the manner in which APIs facilitate financial services, and
customer analytics improvement.
3.3 Analytical Framework
Thematic analysis model is applied to classify results into significant themes such as API-driven personalization, real-
time customer journey optimization, and bank experiences across devices. Application of the model aids in establishing
trends in API adoption and its impact on customers' engagement.
3.4 Validity and Reliability Measures
To provide validity and reliability, cross-checking of various sources and references from peer-reviewed journals and
industry reports of note are employed. The study is triangulated with theoretical models as well as case study
comparison to add credibility.
3.5 Ethical Considerations
Ethical concerns, given that this study does not entail human subjects or primary data, are mostly about correct citation,
avoiding bias in the choice of literature, and objectivity in framework while examining studies at hand.
IV. FINDINGS
4.1 Evolution of API-First Banking
4.1.1 Open Banking and APIs
Open Banking, facilitated by APIs, has shifted from a technical capability to a business imperative, enabling banks to
offer more agile and customer-centric services. This model encourages competition and customer engagement by
allowing customers to manage their financial affairs more effectively[12,16].
4.1.2 Digital Transformation
The integration of digital tools such as internet banking, mobile applications, and data analytics has significantly
influenced customer relationship strategies. Banks that effectively incorporate these tools into their operations are better
positioned to meet evolving customer needs, leading to improved satisfaction and loyalty[13,14].
4.2 Impact on Customer Journey Analytics
4.2.1 Enhanced Customer Engagement
The adoption of digital banking solutions, including APIs, has been positively correlated with increased customer
engagement. This is due to the convenience and personalization that digital tools offer, which are crucial for
maintaining customer satisfaction and loyalty[13,14].
IJARSCT
ISSN (Online) 2581-9429
International Journal of Advanced Research in Science, Communication and Technology (IJARSCT)
International Open-Access, Double-Blind, Peer-Reviewed, Refereed, Multidisciplinary Online Journal
Volume 5, Issue 1, March 2025
Copyright to IJARSCT DOI: 10.48175/IJARSCT-23633 202
www.ijarsct.co.in
Impact Factor: 7.67
4.2.2 Data-Driven Insights
APIs enable banks to access and analyze customer data more efficiently, providing insights that can be used to tailor
services and improve customer experiences. This data-driven approach is central to the evolution of customer journey
analytics in the banking sector[16].Customer journey analytics within API-first banking represents a radical shift
towards understanding customers and customer engagement through various channels. This is driven by the need of
banks to remain current with modern customer needs and behaviors through latest technologies such as artificial
intelligence and deep learning.
4.3 Integration of Advanced Analytics
4.3.1 Deep Learning Models: Banks are employing recurrent neural networks (RNNs) to analyze customer journey
events, achieving high predictive accuracy for cross-selling opportunities. [3]
4.3.2 Channel Measurement: As customer journeys span various digital platforms, effective measurement of
interactions across these channels is crucial for optimizing marketing strategies [4].
4.4 Customer-Centric Approaches
4.4.1 Mapping Customer Journeys: Techniques like customer journey mapping help identify critical touchpoints and
improve customer satisfaction by addressing pain points [5,6].
4.4.2 Feedback Mechanisms: Continuous feedback from customers is essential for refining services and enhancing
user experiences, particularly in competitive markets like digital wallets [6].
Though technology and analytics usage are important, they have been faulted on the basis that it will overlook the
human element in banking and ultimately chase away customers who value face-to-face interaction. Blending
technology and personalized service remains a secret to banks in such a fast-changing world.Customer journey
analytics capability has followed bank architecture evolution. While early digital banking supported simple customer
interaction tracking, API-first applications of today support end-to-end journey mapping and predictive analytics.
V. THEORETICAL FRAMEWORK
5.1 API-First Architecture Principles
API-first design puts the back to basics school of banking design in style, and consumers, third-party companies, and
banks can live blissfully together. Its foundation upon modularity, scalability, and interoperability gestates innovation
and bliss. Banks become quicker to react and nimbler for evolving customer demands when they construct systems
from the bottom up by APIs rather than monolithic systems.
5.2 Customer Journey Mapping Theory
Customer journey mapping (CJM) is an API-first banking strategic methodology that comes in handy in the
examination of customer touchpoints across platforms. CJM is a critical exercise particularly in API-first banking as it
enables banks to track and optimize digital touchpoints along behavior patterns. The theory has a center stage on
seamless, personalized customer experience with APIs enabling interactions and frictionless transactions.
5.3 Digital Banking Transformation Models
Digital banking innovation models provide a systematic way of integrating digital innovations into traditional banking
platforms. Among these models, omnichannel banking, open banking, and embedded finance are of the most critical
importance. These models employ API-first methods to make the delivery of services simple so that customers enjoy
uniform and effective experiences across platforms.
5.4 Data Analytics and Predictive Modeling
In an API-first banking, predictive analytics and data analytics are paving the way for customer journey analytics to be
improved. AI and machine learning-driven analytics allow banks to predict client needs, identify fraud and enhance
service delivery. Predictive analytics also allows for transaction behavior analysis and therefore allows banks to
provide personalized financial services and solutions.
IJARSCT
ISSN (Online) 2581-9429
International Journal of Advanced Research in Science, Communication and Technology (IJARSCT)
International Open-Access, Double-Blind, Peer-Reviewed, Refereed, Multidisciplinary Online Journal
Volume 5, Issue 1, March 2025
Copyright to IJARSCT DOI: 10.48175/IJARSCT-23633 203
www.ijarsct.co.in
Impact Factor: 7.67
5.5 Service Design and Delivery Framework
The core function of service design principles is to create customer-focused financial services through the integration of
API-powered capabilities. API-first banking digital solutions are easy to use, convenient, and responsive due to their
service design. As customers' behavior changes, banks can use APIs to empower a more adaptable and responsive
financial system.
5.6 Statistical Analysis Results
While no primary statistical comparison is undertaken by this research, the literature suggests that APIs-based customer
journey analytics in bank exhibit considerable difference in digital take-up, conversion as well as performance.
VI. RESEARCH GAPS AND FUTURE DIRECTIONS
Despite considerable research into the way digital banking developed, many of the key issues are poorly understood:
6.1 Long-term consequences of API-first architecture on customer satisfaction and bank performance
6.2 Challenges of incorporating API-first solutions into legacy systems
6.3 Customer journey analytics must be standardized across institutions
6.4 Impacts of increased availability of data through APIs
VII. CHALLENGES
Security Concerns: As APIs become integral to digital banking, security remains a top concern. The concept of Data
Security Operations (DataSecOps) has emerged to address these risks, emphasizing the need for collaboration among
software engineers, data scientists, and cybersecurity teams[14].Regulatory and Competitive Pressures: Regulatory
frameworks like the Revised Payment Services Directive (PSD2) have accelerated the need for banks to open their
systems, fostering a competitive environment that requires continuous innovation and adaptation[12,15].
VIII. CONCLUSION
API-first banking is reshaping the financial landscape by enhancing customer journey analytics and fostering a more
connected and innovative ecosystem. While this approach offers significant opportunities for improved customer
engagement and service personalization, it also presents challenges, particularly in terms of security and regulatory
compliance. As the banking sector continues to evolve, the symbiotic relationship between Open Banking and the API
economy will be crucial in driving future innovations and maintaining a customer-centric focus[12,14,16].API-first
banking has introduced standardized trend adoption, including open banking platforms, microservices architecture, and
event-driven APIs. These trends offer flexible and scalable banking solutions with the promise of higher customer
engagement via digital channels. Studies indicate that API-first banking enhances the robustness of fintech solution
integrations, which ensures real-time data exchange and embedded finance functionality. This has introduced increased
service agility and a broader financial services ecosystem. Customer journey analytics in API-first banking have been
designed to leverage real-time data to create hyper-personalized financial experiences. The findings show that
customers increasingly expect contextualized interactions, and hence the banks must fine-tune API design for higher
personalization. API-first banking has been found to bring improvements in key performance metrics, including
reduced transaction processing time, increased user engagement, and improved service reliability. Such improvements
translate to improved customer satisfaction and loyalty. Comparative benchmarking with other types of financial
institutions shows the effects of API-driven innovation in a differentiated customer journey. With banks increasingly
'API-first, digital-native banking has employed 'API ecosystems for better agility along with a more personalized
experience. It entails extensive theoretical and analytical research on the API-first banking revolution of customer
journey analytics. It provides important insights regarding the future of digital banking as well as customer experience
strategy by bridging real-time data with insights derived from nascent trends. It is through the potential to make real-
time, data-informed decisions that drive personalization and deliver frictionless cross-channel experiences that API-first
banking has revolutionized customer journey analysis. The research contends that financial ecosystems facilitated by
APIs provide banks dynamism to innovate, bring on board new services at affordable costs, and manage increasing
customers' expectations. Second, the integration of predictive analytics with machine learning through API-first
IJARSCT
ISSN (Online) 2581-9429
International Journal of Advanced Research in Science, Communication and Technology (IJARSCT)
International Open-Access, Double-Blind, Peer-Reviewed, Refereed, Multidisciplinary Online Journal
Volume 5, Issue 1, March 2025
Copyright to IJARSCT DOI: 10.48175/IJARSCT-23633 204
www.ijarsct.co.in
Impact Factor: 7.67
architectures has enhanced the ability of banks to forecast the needs of clients and facilitate models of engagement.
Microservices structure and open banking initiatives also help enable API-first banking as the core component of digital
transformation and hence make the financial environment responsive and integrated. As there is additional development
within the banking sector, banks with API-first approaches will be better positioned to outcompete with better customer
experiences, greater operating efficiencies, and fintech partnerships. Future studies can also examine the long-term
impact of API-first banking on regulatory compliance, cybersecurity, and financial inclusion worldwide.
REFERENCES
[1]. Zhou, Mi and Geng, Dan and Abhishek, Vibhanshu and Li, Beibei, When the Bank Comes to You: Branch
Network and Customer Omni-Channel Banking Behavior (September 7, 2017). Available at SSRN:
https://ssrn.com/abstract=3033988 or http://dx.doi.org/10.2139/ssrn.3033988
[2]. Skog, D.A., Wimelius, H. & Sandberg, J. Digital Disruption. Bus Inf Syst Eng 60, 431–437 (2018).
https://doi.org/10.1007/s12599-018-0550-4
[3]. Dwivedi, D. N., Batra, S. W. T., & Pathak, Y. (2024). Enhancing Customer Experience: Exploring Deep
Learning Models for Banking Customer Journey Analysis (pp. 477–486). Springer International Publishing.
https://doi.org/10.1007/978-981-99-8476-3_39
[4]. Clarke, G. (2018). The importance of measuring impact across channels in the digital banking landscape.
https://hstalks.com/article/2936/the-importance-of-measuring-impact-across-channels/
[5]. Kaufmann, T. (2021). Customer Journey Analyse (pp. 125–135). Springer Gabler, Berlin, Heidelberg.
https://doi.org/10.1007/978-3-662-63105-8_13
[6]. Kusuma, A. B., &Tricahyono, D. (2020). Analisis Customer Journey Mapping UntukMeningkatkan
Customer Experience Pada AplikasiDompet Digital Ovo. 7(2).
https://openlibrarypublications.telkomuniversity.ac.id/index.php/management/article/download/12048/11873
[7]. Kröner, Matthias (2018, February 1). API deep dive: Who will thrive in an open banking world? Why
meeting regulatory requirements is not enough for banks to remain relevant. In the Journal of Digital
Banking, Volume 2, Issue 3. https://doi.org/10.69554/CBIF6461.
[8]. van de Venn, Peter-Jan (2017, September 1). ‘Mobile First’ will become ‘API First’ — PSD2: Changing
banking as we know it. In the Journal of Digital Banking, Volume 2, Issue 2.
https://doi.org/10.69554/CHWU1258.
[9]. Hensen, Joris and Kötting, Brigitte (2022, March 1). From open banking to embedded finance: The essential
factors for a successful digital transformation. In the Journal of Digital Banking, Volume 6, Issue 4.
https://doi.org/10.69554/SRCL3482.
[10]. Yanagawa, Eiichiro (2019, March 13). Open API banking: A powerful trigger for the value chain revolution
in Japan. In the Journal of Digital Banking, Volume 3, Issue 4. https://doi.org/10.69554/IVOV9074.
[11]. Davis Dorran Douglas (2024). The Transformative Impact of AI in Finance and Banking.
https://doi.org/10.33140/jibf.02.01.06
[12]. Premchand, A., & Choudhry, A. (2018). Open Banking & APIs for Transformation in Banking. 2018
International Conference on Communication, Computing and Internet of Things (IC3IoT), 25-29.
https://doi.org/10.1109/IC3IOT.2018.8668107.
[13]. Agarwal, V., Garg, A., Olakh, S., K, L., Sharma, P., Chauhan, D., & Goyal, S. (2024). Impact of Digital
Evolution on Customer Relationship Strategies in the Banking Sector. EVOLUTIONARY STUDIES IN
IMAGINATIVE CULTURE. https://doi.org/10.70082/esiculture.vi.1177.
[14]. Lancos, P. (2021). Transforming the future of digital banking with APIs and DataSecOps. Journal of Digital
Banking. https://doi.org/10.69554/qbkl3855.
[15]. Stefanelli, V., & Manta, F. (2022). Digital Financial Services and Open Banking Innovation: Are Banks
Becoming ‘invisible’?. Global Business Review. https://doi.org/10.1177/09721509231151491.
[16]. Parate, S., Reddi, L., Agarwal, S., &Suryadevara, M. (2023). Analyzing the Impact of Open Data Ecosystems
and Standardized Interfaces on Product Development and Innovation. International Journal of Advanced
Research in Science, Communication and Technology. https://doi.org/10.48175/ijarsct-13165.