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What is the URL scheme that is used by Bitcoin to copy transaction information directly into the client? Which versions of Bitcoin clients support it?

Murch
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ThePiachu
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2 Answers2

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The Bitcoin Improvement Proposal that defines the Bitcoin URI scheme is BIP21.

The simple syntax is:

bitcoin:<address>[?amount=<amount>][?label=<label>][?message=<message>]

On the desktop all of Armory, Electrum and MultiBit respond to Bitcoin URI clicks in a browser and I believe Bitcoin-QT V0.7 does as well.

On mobiles Android Bitcoin Wallet does. On the iPhone the blockchain.info app does.

魔大农
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jim618
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    Bitcoin-Qt v0.7 for Windows does. Not Mac or Linux yet. – Stephen Gornick Oct 11 '12 at 20:56
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    It's important to note that although it isn't specified in the simple syntax, '?' after the first are changed to '&' as in regular URLs. For example: `bitcoin:?amount=1&message=mymsg` – Kevin Cox Jan 13 '14 at 23:02
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    Not to nitpick, but the acronym "BIP" stands for *Bitcoin Improvement Proposal* instead of *Bitcoin Improvement Process*. – Priidu Neemre Mar 26 '15 at 15:19
  • Apparently the number of decimals in the BTC amount matters. My wallet was rejecting the uri until I reduced the decimals to eight. – KalenGi Feb 10 '16 at 08:57
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I think you need something like this

<a rel="payment" href="bitcoin:bitcoin_address_is_here?amount=5.00?message=payment to site name"><h2>Pay in Bitcoin now</h2></a>
Meshach Friday
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