Thank you @nawab69 for your contribution!.

1. I can see you are wrapping APIs upon the official full node - which you might want to extract that into a common configuration - if the node fails, you may want to have a fall-over mechanism to try next one.
2. The header should really be before your echo. Otherwise, depending on network latency, sometimes the browsers may have a warning.
3. Your APIs are not unit tested - could be good to have some tests
4. You don't need the ?> which is recommended in API, otherwise, you might accidently put extra blank lines after - which will be valid HTML outputs, and you don't want that.
5. Your curl code could be extracted into a function/class - this is to remove code duplication in your APIs.

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