Yes, CoinAPI can be used commercially.
As per our legal policy, the following is a non-exhaustive list of practices that would not be considered "Legitimate Use":
- Using our services for unreasonable workloads we determine (in our sole discretion) to be unrelated to the deployment and maintenance of your own services;
- Re-selling our services or parts thereof to another party;
- Using our services in a manner we determine (in our sole discretion) could cause harm to our services or another party; or
- Unusual usage patterns inconsistent with those we reasonably consider as normal use when compared to other customers.
More information can be found in our legal information here: https://www.coinapi.io/legal