# Kontosjekker

> Identify the Norwegian bank behind an account number, validate account numbers and IBANs, and fetch bank logos.

## Docs

- [Kontosjekker](/): Which bank owns this account number — and is the number even valid?
- [Account numbers](/account-numbers): How Norwegian account numbers are structured, and what validation can prove.
- [Authentication](/authentication): API keys, rate limits and what happens when you exceed them.
- [Logos](/logos): Serving bank logos, and how to cache them properly.
- [React component](/react): An account number input with formatting, validation and bank detection.
- [The dataset](/dataset): Where the register comes from, how often it changes, and how to pin it.

## Api

- [Kontosjekker](/api)

### Accounts

- [Validate an account number and identify its bank](/api/accounts/validateaccount)

### Banks

- [Get one bank by BIC](/api/banks/getbank)
- [List banks](/api/banks/listbanks)
- [Look up a bank by clearing code or BIC](/api/banks/lookupbank)

### Logos

- [Get a bank logo](/api/logos/getbanklogo)
- [Get a bank logo in a specific format](/api/logos/getbanklogobyformat)

### System

- [Liveness probe](/api/system/health)
- [Provenance of the active bank register](/api/system/getdataset)
- [Readiness probe — checks the database is reachable](/api/system/ready)