There are some awesome APIs that index/aggregate on-chain data across multiple chains that you can use too. I would generally recommend these over the exchange APIs.https://glacier-api.avax.network/apihttps://thegraph.com/en/https://docs.alchemy.com/reference/api-overview. Source: about 1 year ago

Forecasting GRT/USD (graph token to go up to between $0.30 and $0.55. https://thegraph.com/en/. Source: over 1 year ago

When it comes to indexing solutions, you can use The Graph; a decentralized solution, and again use Nader's resources to learn how to get started:. - Source: dev.to / over 1 year ago

Alternatively if you do want to go the third party data route, there are a number of saas type offerings on the market - thegraph was once pretty popular (https://thegraph.com/en/) they provide a graphql interface for querying data. Source: over 1 year ago

This is by no means an exhaustive list, just a smattering of some of the bigger projects doing neat things. The graph protocol - decentralized blockchain indexing feeding a network of graphQL servers hosting the data powering dapps https://thegraph.com/en/ Chainlink - decentralized on-chain oracles for basically any piece of data from the real world - https://chain.link/ MakerDAO - creator of the first “soft... - Source: Hacker News / over 1 year ago

Https://finary.com/en looks like a lot under the hood but maybe too much? Source: 10 months ago

Have you looked into Finary? They offer 20k+ banks & investment platforms and seem to cover many different asset classes. Their App is pretty nicely rated. Source: over 1 year ago