user4012: What is the minimum (lowest) amount of Ada needed to stake?
Could you have the delegation fee + 0.00001 Ada?  Where is this referenced?

user4302: There is no staking minimum, but there is a UTXO minimum. With current protocol parameters, any UTXO on Cardano must have a minimum of 1 ADA (minUTXOvalue).
So while possible in principle, there is currently no way to create a UTXO, and thus to stake, anything less than 1 ADA.

user5286: There is an initial 2.17 ADA fee when delegating a wallet for the first time.
Here's the breakdown of that: 2 ADA deposit goes towards registering your stake address on the blockchain and ~0.17 ADA is the transaction fee.
Note: the 2 ADA deposit is refundable upon unstaking
Happy staking!
The 2 ADA (current configuration of "keyDeposit") comes from the mainnet genesis file.

4012: <p>What is the <strong>minimum</strong> (lowest) amount of Ada needed to <strong>stake</strong>?</p>
<p>Could you have the delegation fee + 0.00001 Ada?  Where is this referenced?</p>
 4302: <p>There is no <em>staking</em> minimum, but there is a UTXO minimum. With current <a href="https://developers.cardano.org/docs/governance/cardano-improvement-proposals/cip-0009/" rel="nofollow noreferrer">protocol parameters</a>, any UTXO on Cardano must have a minimum of 1 ADA (minUTXOvalue).</p>
<p>So while possible in principle, there is currently no way to create a UTXO, and thus to stake, anything less than 1 ADA.</p>
 5286: <p>There is an initial 2.17 ADA fee when delegating a wallet for the first time.</p>
<p>Here's the breakdown of that: 2 ADA deposit goes towards registering your stake address on the blockchain and ~0.17 ADA is the transaction fee.</p>
<p><em>Note: the 2 ADA deposit is refundable upon unstaking</em></p>
<p>Happy staking!</p>
<p>The 2 ADA (current configuration of &quot;keyDeposit&quot;) comes from <a href="https://hydra.iohk.io/build/3670619/download/1/mainnet-shelley-genesis.json" rel="nofollow noreferrer">the mainnet genesis file</a>.</p>
