Frankfurter

Frankfurter API is an online platform which fetches current and historical exchnge rate data.

ingestr supports Frankfurter as a source primarily to demonstrate ingestr's features since the API doesn't require any authentication.

URI format

The URI format for Frankfurter is as follows:

frankfurter://?base=<currency-code-here>

URI parameters:

• base: defines the base currency code (e.g. EUR, USD, IDR) used to calculate the exchange rates.

Set-Up Frankfurter Integration

Let's say you want to fetch the exchange rates for a certain period with the base currency as Indian Rupees. Here's a sample command that will copy this data into your DuckDB database:

ingestr ingest \
--source-uri 'frankfurter://?base=INR' \
--interval-start '2025-03-20' \ 
--interval-end '2025-03-28' \       
--source-table 'exchange_rates' \    
--dest-uri 'duckdb///frankfurter.duckdb' \
--dest-table 'my_schema.exchange_rates'

The result of this command will be a list of currency exchange rates from 20.03.2025-28.03.2025 with INR as the base currency in your DuckDB database.

Tables

• latest: Fetches the latest exchange rates.
• exchange_rates: Fetches historical exchange rates for a specified date range.
• currencies: Fetches a list of the available currencies and their ISO 4217 currency code (e.g. USD, EUR, GBP).

Use these as --source-table parameter in the ingestr ingest command.

Notes:

• The arguments --interval-start and --interval-end are only relevant for the table exchange_rates.
• If a start date but no end date is specified, then the end date will default to today's date and ingestr will retrieve data up until the latest published data.
• Note that the Frankfurter API only publishes updates Monday-Friday. If the given date is on the weekend, the date will default to the previous Friday.