1. © Open Banking Limited 2018
Open Banking Financial API Workshop
July 2018
Ralph Bragg, Ecosystem Architect

2. © Open Banking Limited 2018 2
OPEN BANKING UPDATE
Tasked with delivering the Open Banking API standards and security architecture
The CMA9 are the UK’s nine largest current account providers: AIBG, Bank of Ireland, Barclays, Danske, HSBC, Lloyds
Banking Group, Nationwide, RBS and Santander
The Open Banking Implementation Entity (OBIE)
OBIE was set up
by the CMA
in September
2016
A world leader in
the implementation
of the Open
Banking Remedies,
assisting in the
delivery of the first
APIs
A private body
whose
governance,
composition and
budget was
determined by the
CMA
Funded by the
CMA9 and
overseen by the
CMA, the Financial
Conduct Authority
(FCA) and Her
Majesty’s Treasury

3. © Open Banking Limited 2018 3
INTRODUCTION
Four broad categories of standards and information necessary for the API economy
OBIE Creating Banking Standards
IDENTITY
A “WHITE LIST”
OF TRUSTED
PARTICIPANTS
AND CUSTOMER
RELEVENT
OFFERINGS
REFERENCE DATA
”OPEN DATA”
API
BANK PRODUCT
DESCRIPTIONS
ATM LOCATIONS
USERS DATA
“READ WRITE”
API
ACCOUNT
INFORMATION
PAYMENTS
OPEN BANKING UK OPEN BANKING UK
SECURITY
“MATURE OPEN
SECURITY
STANDARD”
INCLUDING
CONSENT AND
AUTHORIZATION
OPEN BANKING UK, STET,
BERLIN GROUP, ISO 22022
OPEN BANKING UK

4. © Open Banking Limited 2018 4
INTRODUCTION
The only body in Europe mandated to ensuring nationally consistent implementation to realize an ecosystem not
just enable participant compliance
OBIE Building an Ecosystem!
IDENTITY
A “WHITE LIST”
OF TRUSTED
PARTICIPANTS
AND CUSTOMER
RELEVENT
OFFERINGS
REFERENCE DATA
”OPEN DATA”
API
BANK PRODUCT
DESCRIPTIONS
ATM LOCATIONS
USERS DATA
“READ WRITE”
API
ACCOUNT
INFORMATION
PAYMENTS
SECURITY
“MATURE OPEN
SECURITY
STANDARD”
INCLUDING
CONSENT AND
AUTHORIZATION
ENSURE CONSISTENT IMPLEMENTATIONS FOR ALL CMA9 and THIRD PARTIES

5. © Open Banking Limited 2018 5
INTRODUCTION
Time to onboard to new providers is the biggest barrier for new entrants followed very closely by consistency of
offering.
OBIE An ecosystem for developers
IDENTITY
OB Onboarding (1 API Call)
Application Registration (1 API Call)
Provider Bank Discovery (1 API Call)
Provider Onboarding (1 API Call)
Swagger (Open API) Fully Specified
OPEN BANKING UK
SECURITY
A Common Security Framework
(70million accounts)
A Common Consent and Authorization
Model
Standard Designed to Protect Third-
Parties and Banks
OPEN BANKING UK

6. © Open Banking Limited 2018
Yolt – Starling demo – What does it look like?
6
OPEN BANKING UPDATE

7. © Open Banking Limited 2018

8. © Open Banking Limited 2018
What’s in each version
OPEN BANKING UPDATE
V1 (Jan 18)
• AIS (Account &
Transaction Data)
• PIS (Single Immediate
Payments only)
• PCA/BCA accounts in
GBP
V2 (Aug 18)
• Extended AIS all PSD2
accounts (e.g. cards,
savings, mortgages)
• Still only GBP
V3 (Mar-Sep 19)
• AIS and PIS for all
PSD2 accounts and all
currencies
• PIS for multi-auth,
FDP, SO, bulk/batch,
international/FX
• CBPII fund check API
• Decoupled flows
• Enhanced CX
guidelines and
checklists
V4 (Sep 19)
• Notification of
revocation
• TB and SCA
exemptions (inc
Variable Recurring
Payments)
• Other TBC…
OB Directory (eIDAS compliant) + Support + Dispute Management

9. © Open Banking Limited 2018
The Open Banking Timeline
9
OPEN BANKING UPDATE
PSD2 Comes
into force
Mar
2017
Jan
2018
Aug
2018
Mar
2018
Mar
2019
Sep
2019
Open Data v1
Sep
2016
OBIE
created
RTS application dateRTS published RTS testing
Open Data v2
Jul
2017
Read/Write v1
Read/Write v2
Read/Write v3
Read/Write v4

10. © Open Banking Limited 2018
How does it work?

11. © Open Banking Limited 2018
Problem statement
11
OPEN BANKING IDENTITY CHALLENGE
Secure
Understood
by developers
+
Supported by
vendors
Can be
implemented
in time

12. © Open Banking Limited 2018
API Flow (Account and Transaction)
12
OPEN BANKING IDENTITY CHALLENGE

13. © Open Banking Limited 2018
Security – striking the balance
13
OPEN BANKING IDENTITY CHALLENGE
2017

14. © Open Banking Limited 2018
Security – striking the balance
14
OPEN BANKING IDENTITY CHALLENGE
2017

15. © Open Banking Limited 2018
Security – striking the balance
15
OPEN BANKING UPDATE

16. © Open Banking Limited 2018
Conformance and certification
16
OPEN BANKING IDENTITY CHALLENGE

17. © Open Banking Limited 2018
Where are the specifications?

18. © Open Banking Limited 2018
The API Specifications
18
OPEN BANKING IDENTITY CHALLENGE
Open Banking Developer Zone:
https://openbanking.atlassian.net/
wiki/spaces/DZ/overview
• Security Specifications
• API Definitions
• Swagger Files
• Sequence Diagrams

19. © Open Banking Limited 2018
How can I test my applications?

20. © Open Banking Limited 2018
Test Facilities
20
OPEN BANKING IDENTITY CHALLENGE
Reference Banks:
• Provides Test Payment and API Services
Conformance Harness:
• Security Profile Testing

21. © Open Banking Limited 2018
Thank you
www.openbanking.org.uk
ralph.bragg@openbanking.org.uk