Blockchain.info API - Check transactions from one address to another
You can use pybitcointools history(address). Note that this function has bugs, so try my fork instead.

Or, the API request for 12c6DSiU4Rq3P4ZxziKxzrL5LmMBrzjrJX would be:

https://blockchain.info/address/12c6DSiU4Rq3P4ZxziKxzrL5LmMBrzjrJX?format=json&amp;offset=0


If there's more than 50 results, you'd change offset=50.

I'll provide more details if required.

My personal recommendation would be to use this API call, as there's no offset issues:

https://bitcoin.toshi.io/api/v0/addresses/12c6DSiU4Rq3P4ZxziKxzrL5LmMBrzjrJX/transactions