How AI is applied across API Evangelist and APIs.io. Read my AI disclosure →
API Evangelist API Evangelist
Discovery
Learnings
Guidance
Toolbox
Alignment
API Evangelist LLC

Barclays Authentication API

Secure OAuth2 authentication for accessing Barclays Open Banking APIs.

Barclays Authentication API is one of 30 APIs that Barclays publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Authentication and Security. The published artifact set on APIs.io includes API documentation, an API reference, and an OpenAPI specification.

This API exposes 2 operations across 2 paths, organized into 2 resource areas, and defines 17 schemas. It is described by OpenAPI 3.1.0, at version 2.0.

2 operations 2 paths 17 schemas 2 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.1.0
API Version
2.0
Authentication
OAuth 2.0
Resource Areas
2

Authentication & Security 1

Barclays Authentication API declares 1 security scheme for authenticating requests. It supports OAuth 2.0 (ExternalTiaaUsCCAuth) using the clientCredentials flow, exposing 2 scopes.

  • ExternalTiaaUsCCAuth — OAuth2.0 Client Credentials Grant authentication using TIAA-US for external APIs

Paths & Operations 2

Across 2 paths, the API surfaces 2 operations — 2 POST. They span 2 resource areas: user-sso-context, user-identity-context. Each is listed below with its method, path, parameters, and response codes.

user-sso-context 1

User sso context API

POST
/users/sso
single-sign-on customer context. This operation contains sensitive data in request and response payload.
request-sso 3 params body → 200400401500403404503
user-identity-context 1

User identity context API

POST
/users/{externalAccountId}/context
To setup user identity context for customer login. This operation contains sensitive data in request and response payload.
request-auth 4 params body → 200400401500403404503

Schemas 17

The contract defines 17 schemas that model the data the API accepts and returns. The most detailed are DeviceDetails (16 properties), CustomerProfile (13 properties), UserSSOContextRequestData (6 properties), UserIdentityContextRequestData (6 properties). Each schema is shown below with its type and property counts.

DeviceDetails
object
Customer details
16 properties
UserSSOContextResponseData
object
response payload for sso.
2 properties
UserIdentityContextResponse
object
User identify context response.
1 property 1 required
UserIdentityContextResponseData
object
User identity context response data.
2 properties
UserSSOContextRequestData
object
Request payload for User SSO context.
6 properties 4 required
ErrorResponseType
object
An API error response.
1 property
UserIdentityContextRequest
object
User identity context request.
1 property 1 required
UserSSOContextRequest
object
SSO Request Data
1 property 1 required
CustomerProfile
object
Customer's partner account relationship details
13 properties 4 required
AdditionalSSOAttributes
array
Additional attributes for SSO context
Identifier
object
An field for customer unique identifier.
2 properties 2 required
NameValueAttributePair
object
Attribute name and value pair
3 properties 2 required
ErrorType
object
Message details - additional operation execution information.
4 properties 3 required
DeviceAttributes
array
Additional device attributes useful for fraud risk assessment
UserIdentityContextRequestData
object
User identity context request data.
6 properties 4 required
CustomerProfileAttributes
array
Additional customer profile attributes useful for fraud risk assessment
UserSSOContextResponse
object
User SSO Response.
1 property 1 required

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

barclays-authentication-openapi.yml Raw ↑

Other APIs Barclays publishes across the network.

Barclays Smartpay Web Payment API
Barclays Bank Ireland Confirmation of Funds API
Barclays Account and Transactions API
Barclays Bank Ireland Account Information API
Barclays Bank Ireland Payment Initiation API
Barclays Confirmation of Funds API
Barclays Dynamic Client Registration API
Barclays Event Notification API
Barclays Payment Initiation API
Barclays ATM Locator API
Barclays Branch Locator API
Barclays FCA Service Metrics API
Where this information came from

This is an independent, third-party profile of Barclays Authentication API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

info@apievangelist.com · Read the full data-sourcing policy →
On a security or compliance team? Put security in the subject line and you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.