user-1: Using the blockchain.info API, how can I check the transactions from one address to another, including the number of confirmations?
Clarification: I have one address let us say. I want to programmatically check new transactions, without running a wallet and a full node on my computer. So my address is fixed. The sender address is also fixed. So, given 2 addresses, get all the transactions from one to the other. And ideally including the number of confirmations.

user9382: 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&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


-1: <p>Using the <a href="https://blockchain.info/api" rel="nofollow">blockchain.info API</a>, how can I check the transactions from one address to another, including the number of confirmations?</p>

<p><strong>Clarification:</strong> I have one address let us say. I want to programmatically check new transactions, without running a wallet and a full node on my computer. So my address is fixed. The sender address is also fixed. So, given 2 addresses, get all the transactions from one to the other. And ideally including the number of confirmations.</p>
 9382: <p>You can use <a href="https://github.com/vbuterin/pybitcointools" rel="nofollow">pybitcointools</a> <code>history(address)</code>. Note that this function has bugs, so try <a href="https://github.com/wizardofozzie/pybitcointools" rel="nofollow">my fork</a> instead.</p>

<p>Or, the API request for <em>12c6DSiU4Rq3P4ZxziKxzrL5LmMBrzjrJX</em> would be:</p>

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

<p>If there's more than 50 results, you'd change <code>offset=50</code>.</p>

<p>I'll provide more details if required.</p>

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

<pre><code>https://bitcoin.toshi.io/api/v0/addresses/12c6DSiU4Rq3P4ZxziKxzrL5LmMBrzjrJX/transactions
</code></pre>
