Cindercloud is free of use for everyone. However, by default unauthenticated requests are throttled at 4 req/min.

Removing this restriction can be done by registering on RapidAPI. After registering and signing up for the free plan, you'll get an API key.

Authentication Header

curl --get --include 'https://cindercloud.p.rapidapi.com/api/ethereum/address/0xc0ffee145a59d2172971cde0f0b4959d51193a80/balance' \
  -H 'X-RapidAPI-Key: YOUR_API_KEY'


The endpoint for unauthenticated requests is https://api.cinder.cloud

Endpoint with RapidAPI

When making use of RapidAPI, the base url changes from https://api.cinder.cloud to https://cindercloud.p.rapidapi.com