Did you have market data in flat files?

Yes. We can upload flat files to the customer-owned Amazon S3 bucket (initial upload + daily updates) for the CoinAPI Enterprise plan customers.

For the retail customers, we operate another website: www.cryptotick.com where selected flat files or directories can be purchased and downloaded on demand.

The samples and documentation of the flat files format is available in the CryptoTick FAQ: https://www.cryptotick.com/faq