How could I do this in the bitcoin client?
Are there any API to search for transactions?
Set txindex=1 in the bitcoin.conf file.
Run the client with -reindex
For every number between 1 and the current block height:
getblockhash [index]
getblock [blockhash]
For each transactionID returned by getblock
getrawtransaction [transactionID]
decoderawtransaction [rawtransaction]
For each output in the JSON vout[] array
Compare the value associated with the "addresses" tag to see if it matches the address you are looking for.
You can write a program to do this if you don't want to do it manually.
