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.

Kin Score

This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.

How we profile Columbia Bank

Each block below is one kind of artifact we hold for Columbia Bank. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.

APIs 1

Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.

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

Columbia API Banking

First-party commercial and treasury-management API product from Columbia Bank, providing programmatic access to banking data and operations for integration with financial softwa...

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Columbia Banking Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Resources

Every other property we hold for Columbia Bank — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.

← All providers · Data indexed from github.com/api-evangelist/columbia-banking · machine-readable index on apis.io