[byproxy]

I wonder how the Lumen value is being derived. I assume whatever current worth is on Coinbase Pro at the time the amount is sent, considering they namedrop Coinbase Pro as a place to buy Lumens.

[malgorithms]

CoinMarketCap's paid API. We're open to considering other data sources.

[modeless]

I would suggest OpenMarketCap instead. CoinMarketCap is known to include exchanges that fake their volume and I wouldn't be surprised if their price data is somewhat manipulated too.

https://openmarketcap.com/exchanges/faq

[electic]

Correct. The price especially is wrong on CMC when there is high volume events.

I also invite the OP to check out Blockmodo's API. We deliver this data to developers and institutional investors.

https://blockmodo.com/docs/api

We stream everything which includes the price, trades, news, social media and community posts, and code checkins.

On the price side, we have two channels. We have a stream channel and a ticker channel. The stream channel derives the price of tokens by looking at raw trades from a select set of exchanges which have been vettted.

We are based in SF and happy to help at no charge! Drop us a note.