East West Bank

East West Bank is the California state-chartered commercial banking subsidiary of East West Bancorp, Inc. (NASDAQ EWBC), headquartered in Pasadena, California, with roughly $79.7 billion in total assets and more than 125 locations across the United States and Greater China. A Member FDIC institution and one of the few U.S. banks holding a full banking license in China, it specializes in cross-border U.S.-China commercial banking, treasury and Global Transaction Services (GTS). On the open-finance front, East West Bank runs a first-party developer portal ("Bridge Open Banking" at apiportal.eastwestbank.com) aimed at commercial clients, documenting APIs to manage sub-accounts, retrieve balances, transfer funds, and obtain commercial account information, with a sandbox of live test accounts; the program is early-stage ("more APIs coming soon") and gated behind sales onboarding, so no OpenAPI/Swagger is publicly downloadable. Consumer-permissioned data access is also available indirectly through the Plaid aggregator. No public FDX participation or CFPB Section 1033 posture is documented as of this profile.

East West Bank publishes 1 API on the APIs.io network. Tagged areas include Financial Services, Banking, United States, Commercial Banking, and Treasury Management.

East West Bank’s developer surface includes documentation, support, authentication, sandbox, getting-started guide, signup flow, and 11 more developer resources.

🌐 Visit website 📡 Source on GitHub

29.8/100 emerging ▬ flat Agent 10/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

1 APIs

Financial ServicesBankingUnited StatesCommercial BankingTreasury ManagementCross-BorderOpen FinanceData Aggregation

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 29.8/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 10.0 / 20

Commercial Clarity 6.8 / 20

Operational Transparency 0.7 / 13

Governance 0.0 / 12

Discoverability 8.0 / 10

Agent readiness — 10/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

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APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

Get Started 5

Portal, sign-up, and the first successful call

DeveloperPortal

Sandbox

GettingStarted

SignUp

Login

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Conformance

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

Support

Support

HelpCenter

HelpCenter

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 2

The organization behind the API

Website

Website

LinkedIn

Source (apis.yml)

aid: east-west-bank
url: https://raw.githubusercontent.com/api-evangelist/east-west-bank/refs/heads/main/apis.yml
name: East West Bank
kind: company
description: East West Bank is the California state-chartered commercial banking subsidiary of East West Bancorp, Inc. (NASDAQ
  EWBC), headquartered in Pasadena, California, with roughly $79.7 billion in total assets and more than 125 locations across
  the United States and Greater China. A Member FDIC institution and one of the few U.S. banks holding a full banking license
  in China, it specializes in cross-border U.S.-China commercial banking, treasury and Global Transaction Services (GTS).
  On the open-finance front, East West Bank runs a first-party developer portal ("Bridge Open Banking" at apiportal.eastwestbank.com)
  aimed at commercial clients, documenting APIs to manage sub-accounts, retrieve balances, transfer funds, and obtain commercial
  account information, with a sandbox of live test accounts; the program is early-stage ("more APIs coming soon") and gated
  behind sales onboarding, so no OpenAPI/Swagger is publicly downloadable. Consumer-permissioned data access is also available
  indirectly through the Plaid aggregator. No public FDX participation or CFPB Section 1033 posture is documented as of this
  profile.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- Financial Services
- Banking
- United States
- Commercial Banking
- Treasury Management
- Cross-Border
- Open Finance
- Data Aggregation
created: '2026-07-23'
modified: '2026-07-23'
specificationVersion: '0.19'
apis:
- aid: east-west-bank:bridge-open-banking-api
  name: East West Bank Bridge Open Banking API
  description: East West Bank's first-party commercial banking API program, delivered through the "Bridge Open Banking" developer
    portal for Global Transaction Services (GTS) clients. Documented capabilities let applications manage sub-accounts, retrieve
    account balances, transfer funds, and securely obtain information on commercial accounts. Developers create an application
    to obtain a single authentication credential and test against a sandbox of live test accounts and test payments. The program
    is early-stage and access is gated behind sales onboarding, so specifications are not publicly downloadable.
  humanURL: https://apiportal.eastwestbank.com/how-it-works
  tags:
  - Accounts
  - Balances
  - Payments
  - Transfers
  properties:
  - type: Documentation
    url: https://apiportal.eastwestbank.com/how-it-works
  - type: APIReference
    url: https://apiportal.eastwestbank.com/apis
  - type: Documentation
    url: https://apiportal.eastwestbank.com/products
common:
- type: DomainSecurity
  url: security/east-west-bank-domain-security.yml
- type: Website
  url: https://www.eastwestbank.com/
- type: DeveloperPortal
  url: https://apiportal.eastwestbank.com/
- type: Documentation
  url: https://apiportal.eastwestbank.com/how-it-works
- type: Support
  url: https://apiportal.eastwestbank.com/support
- type: PrivacyPolicy
  url: https://apiportal.eastwestbank.com/privacy-policy
- type: GitHubOrganization
  url: https://github.com/eastwestbank
- type: LinkedIn
  url: https://www.linkedin.com/company/east-west-bank
- type: Authentication
  url: authentication/east-west-bank-authentication.yml
- type: Sandbox
  url: sandbox/east-west-bank-sandbox.yml
- type: Conformance
  url: conformance/east-west-bank-conformance.yml
- type: LLMsTxt
  url: llms/east-west-bank-llms.txt
- type: GettingStarted
  url: https://apiportal.eastwestbank.com/how-it-works
- type: SignUp
  url: https://apiportal.eastwestbank.com/signup
- type: Login
  url: https://apiportal.eastwestbank.com/signin
- type: TermsOfService
  url: https://apiportal.eastwestbank.com/terms-and-conditions
- type: HelpCenter
  url: https://apiportal.eastwestbank.com/faqs
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com