Quote from: Land of Bitcoin on November 13, 2014, 05:13:29 PM

Quote from: Carlos L. on November 13, 2014, 03:38:13 PM

Exact same problem I had, this is their response:

Quote

You can try using an api key with your requests, you might be blocked by our service provider automatically for making too many requests too fast.

If you would like to request a Blockchain API key, then you can do via this form: https://blockchain.info/api/api_create_code. Just let me know when it is submitted, and I will approve it for you.

As far as the double spend goes, I'm sorry that this happened, but blockchain is not liable for user initiated unintentional transactions.

Thank you. API key requested now.

So one thing I noticed was the size of the transaction directly impacted whether or not you would get a 502. Small (25-30 addresses) sendmany were always successful, anything larger up to about 75 addresses was hit or miss and anything above 75 addresses were almost always 502 + really did send the transaction. Glad you got it worked out.