The Cryptsy API is generally used to grab data from the markets, or from your personal account. This data is in the JSON format, and should be parsed using a script, so it's not really meant to be human readable just by pasting the URL in a browser.

It is not safe to leave your API keys in anyone else's hands for very long. A developer can use these keys to make orders, cancel orders, and even withdrawal coins to pre-approved addresses. So in theory, your coins could be maliciously stolen/traded if you have any pre-approved coin addresses, or by trading all the coins for cheap prices in small markets where the thief has placed coordinating orders on another account.

Personally, I do not think this developer would do such a thing. But, you should assume that this site will hacked eventually, and when it does, expect everything I explained above to happen.

Here's an easy solution to prevent this from happening while still using this useful site: Do not leave your Cryptsy API enabled when you aren't using it. I enable mine from the Cryptsy>Settings whenever I am using the Import function on MyAltCoins, and then I disable it once I'm done. If you feel like taking an extra precaution, generate a new API key after every time you use your keys on any site.

Congratulations on meeting my needs of a portfolio with automatic data entry. The Cryptsy copy/paste and API import methods worked flawlessly! This is the most user-friendly portfolio that I've found so far! Keep it coming, I'll definitely be donating. Although, I would be willing to pay a small subscription in cryptocoins to keep the site functioning smoothly, just so you know.

Also, I would love to see these features implemented, and would be willing to contribute!

Import Deposits and Withdrawals;
Export all data;
Profit/Loss for each transaction;
LIFO and FIFO purchase rates;
A single graph of each coin value in BTC or USD over time;
MyAltCoin.com API.

Keep up the good work!

How are you sure those coins were from your account? AFAIK, a lot of exchange sites use shared wallets to cut back on transaction fees. User's balances on exchange sites are not in individual wallets, but are values in the site's database. So unless the site's uses individual wallets for each user's balance, there is no way of finding withdrawals for a specific account on an exchange site from the blockchain.

I can't seem to find any worthwhile portfolios out there, so I've been cooking up something myself. So far it's just a proof of concept in a Google Spreadsheet with scripts to fetch private API data from Cryptsy and organizes the responses into sane tables and a few charts. The important part is that it all works completely automatically, all you have to do is give it the API keys. This is a feature that I think people NEED, for mining and trading, because I feel like I am shooting in the dark when trading and when holding coins on featureless sites. I am not aware of any way to manage an accounting system without huge amounts of manual data entry. Journalizing all this data and implementing inventory systems to determine balance history and profitable prices are very important to have in order to make the best decisions when brokering or even just for miners who want to sell their accumulated altcoins at the best times. WE ALL NEED THIS.

How does CryptoCoinCharts feel about offering this sort of service? I know that some people are uncomfortable with putting API keys on websites. Is this something CCC would like to pursue or stay away from? I really like the progress CCC is making, and if CCC plans to implement this feature then I would love to contribute! I'll share my work when it's done, unless anyone wants to help me with it now, I could really use the help!

+1 CoinEx!

I have an idea on how to automatically add coin balances. The coin's wallet address could be used to monitor it's balance. The balance could be calculated by scanning the coin's blockchain. This would probably be a pretty big task for the servers. Maybe a limit on scan intervals could be set?

Or instead of rescanning the entire blockchain for every balance update, there could be a single task of monitoring the blockchain in realtime that could update all users' balances. Then when a user's address shows up, it applies that value to the user's balance. This way there is no redundancy in reading the blockchains, and everything is updated automatically and in realtime! All the user has to do is give the coin type and wallet address, and then they never have to update again!

Is this a possibility? My roommate keeps asking me what my portfolio value is, and he has no clue how incredibly complicated it is to compile when I have several coins scattered across several accounts. I'm sure we all feel this way!