Free Blockchain api?

[BlackHatCoiner]

Do you know any good and free APIs for the bitcoin's blockchain? Blockchair API costs some dollars per month and I consider it waste of money. There must be a node that accepts this information's transport for free.

I'm looking API for C# (Unity) and PHP.

[joniboini]

Have you tried Blockcypher API? Looks like it is free and supports PHP and other programming languages.
https://www.blockcypher.com/dev/bitcoin/?php#introduction

[TalkStar]

I have experience of using blockchain and coinbase API for some of my clients and they provide great service. As far as i know they only charge for transaction and they have no monthly charges for API users. Although I don't know they have added monthly charges now or not but their service is quite good.  

For better information you may take a look here, Top 10 Best Blockchain APIs. By visiting this link you will get details about top 10 blockchain API and their pricing which may help you to get the best one for your business. 

[AdolfinWolf]

There's a very good free api here => https://github.com/Blockstream/esplora
Not sure what their limits are.