Why am I getting errors with a status code 429?

If you’re a Public API user, the error code 429  indicates that the rate limit has been reached, and you will have to reduce the number of calls made. Consider subscribing to a paid API plan with higher rate limits and call credits: https://www.coingecko.com/en/api/pricing  

If you’re a paid API plan subscriber, please refer to the authentication guide here: https://docs.coingecko.com/reference/authentication