help with API ?

[rizhiy87]

Hi all. I want to try make a project with BTC. In the scope of project is BTC recieveing and batch sending.
1. Where can I get normal API documentation with examples?
2. How can I reduce transactions fees? If I combine several payments into batch transaction - Is it save my btc from fees? How can I do this?
3. Why people are making new addresses for recieve payments?
4. How my site will knows, where payment is prcessed, and user finished his payment successfully?

Thanks for answers. I think this topic will help somebody else.

[agorism]

1) https://en.bitcoin.it/wiki/Original_Bitcoin_client/API_calls_list
2) you can reduce fees by using off chain transactions. http://www.youtube.com/watch?v=4d3LA8KpdMQ
3) it is effortless to make new addresses, and it increases privacy somewhat. So people make new addresses a lot.
4) umm... i don't understand the question? check "listtransactions" "listunspent" in the api. check out blockchain.info