# Documentation Column N.A. is the first nationally chartered bank created to serve developers and builders, offering financial capabilities in a developer first way. We continue building as you build and your feedback is welcome! Honestly... tell us everything, the more critical, the better. We want to hear what you hate, what you like and what you want. It's been a labor of love and we hope you find it useful! For feedback email us at . For technical support email us at , and if you want to complain to the CEO (or say nice things), you can email me at . ### Built on OpenAPI Column's API is defined by an [OpenAPI spec](https://github.com/column/openapi). Use it to generate type-safe client SDKs in any language, import it into tools like [Postman](https://www.postman.com) or [Insomnia](https://insomnia.rest) to explore endpoints, or mock the API locally for testing. The spec is versioned, so you can pin your integration and track changes over time. ### Recommended Guides - [**Getting Started**](/guides/getting-started) — Build a basic payment workflow consisting of a wire, a book transfer, and an ACH credit with Column's APIs. - [**Payment Origination**](/guides/payment-origination) — Originate wires, ACH and book transfers, and store money in an FBO account for your customers. - [**Bank Accounts**](/guides/bank-accounts) — Programmatically open and manage FDIC insured bank accounts at Column on behalf of your customers. We support FBO, sweep, clearing and custom account types. - [**Card Programs**](/guides/card-programs) — Build a card program with Column to offer your customers any type of card. We work with all major networks and issuer processors.