Columbia Bank

Columbia Bank is an Oregon state-chartered commercial bank and the principal banking subsidiary of Columbia Banking System, Inc. (NASDAQ: COLB), a West Coast regional bank holding company headquartered in Tacoma, Washington with more than $50 billion in assets. The bank took the legal name "Columbia Bank" effective July 1, 2025, having previously operated as Umpqua Bank following the 2023 merger of Columbia Banking System and Umpqua Holdings Corporation. On the open-finance front, Columbia is one of the relatively few US regional banks to run a first-party developer surface: Columbia API Banking, a commercial and treasury-management integration product exposing capabilities such as book transfers, ACH file imports, positive pay, stop-payment and NSF management, lockbox management, transaction and statement search, check images, and real-time account balances in JSON and XML, backed by a production-ready SDK and the gated Columbia API Portal. That surface is commercial/ERP-oriented rather than a self-serve public developer portal, and consumer-permissioned data access is instead delivered through the Plaid aggregator. No documented FDX participation or published CFPB Section 1033 posture was found.

Columbia Bank publishes 1 API on the APIs.io network. Tagged areas include Financial Services, Banking, United States, Regional Bank, and Commercial Banking.

Columbia Bank’s developer surface includes documentation, engineering blog, support, and 5 more developer resources.

🌐 Visit website 📡 Source on GitHub

12.8/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-28 · rubric v0.5

1 APIs

Financial ServicesBankingUnited StatesRegional BankCommercial BankingTreasury ManagementOpen FinanceData Aggregation

Kin Score

Kin Score How this is scored →
scored 2026-07-28 · rubric v0.5

Composite quality — 12.8/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 4.8 / 20

Commercial Clarity 0.0 / 20

Operational Transparency 0.0 / 13

Governance 0.0 / 12

Discoverability 8.0 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

MCP Server 0 / 12

Machine-Readable Auth 0 / 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 1

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Company 3

The organization behind the API

Website

Website

Blog

Blog

LinkedIn

Source (apis.yml)

aid: columbia-banking
url: https://raw.githubusercontent.com/api-evangelist/columbia-banking/refs/heads/main/apis.yml
name: Columbia Bank
kind: company
description: 'Columbia Bank is an Oregon state-chartered commercial bank and the principal banking subsidiary of Columbia
  Banking System, Inc. (NASDAQ: COLB), a West Coast regional bank holding company headquartered in Tacoma, Washington with
  more than $50 billion in assets. The bank took the legal name "Columbia Bank" effective July 1, 2025, having previously
  operated as Umpqua Bank following the 2023 merger of Columbia Banking System and Umpqua Holdings Corporation. On the open-finance
  front, Columbia is one of the relatively few US regional banks to run a first-party developer surface: Columbia API Banking,
  a commercial and treasury-management integration product exposing capabilities such as book transfers, ACH file imports,
  positive pay, stop-payment and NSF management, lockbox management, transaction and statement search, check images, and real-time
  account balances in JSON and XML, backed by a production-ready SDK and the gated Columbia API Portal. That surface is commercial/ERP-oriented
  rather than a self-serve public developer portal, and consumer-permissioned data access is instead delivered through the
  Plaid aggregator. No documented FDX participation or published CFPB Section 1033 posture was found.'
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- Financial Services
- Banking
- United States
- Regional Bank
- Commercial Banking
- Treasury Management
- Open Finance
- Data Aggregation
created: '2026-07-23'
modified: '2026-07-24'
specificationVersion: '0.19'
apis:
- aid: columbia-banking:columbia-api-banking
  name: Columbia API Banking
  description: First-party commercial and treasury-management API product from Columbia Bank, providing programmatic access
    to banking data and operations for integration with financial software and ERP platforms. Documented capabilities include
    book transfers, ACH file imports, positive pay, stop-payment and NSF management, new account requests, lockbox management,
    transaction and statement retrieval, check images, and real-time account balances, with responses available in JSON and
    XML. A production-ready SDK (source code and sample apps) and the gated Columbia API Portal provide documentation and
    an event log for debugging. No public OpenAPI/Swagger specification or public base URL was found; technical reference
    lives behind the Columbia API Portal.
  humanURL: https://www.columbiabank.com/commercial/api-banking/
  tags:
  - Commercial Banking
  - Treasury Management
  - Payments
  - ACH
  properties:
  - type: Documentation
    url: https://www.columbiabank.com/commercial/api-banking/
  - type: Documentation
    url: https://www.columbiabank.com/commercial/api-banking/developer-tools/
common:
- type: DomainSecurity
  url: security/columbia-banking-domain-security.yml
- type: LLMsTxt
  url: llms/columbia-banking-llms.txt
- type: DeveloperPortal
  url: https://www.columbiabank.com/commercial/api-banking/
- type: Website
  url: https://www.columbiabank.com/
- type: Documentation
  url: https://www.columbiabank.com/commercial/api-banking/
- type: Blog
  url: https://www.columbiabank.com/blog/
- type: Support
  url: https://www.columbiabank.com/help-center/
- type: LinkedIn
  url: https://www.linkedin.com/company/umpqua-bank
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com