Protocol & Consensus • Estimated 25m

Bitcoin URI Scheme (BIP21)

protocol.bitcoin-uri-bip21

BIP21 defines the `bitcoin:` URI scheme for packaging a payment destination with an amount and optional wallet-facing metadata such as a label or message. It standardizes payment links and QR payloads without changing the underlying transaction format.

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Curated resources (3)

• Bitcoin Developer Guide: Payment Processing (article) Canonical overview of payment requests, `bitcoin:` URIs, QR transport, and their role in wallet payment flows.
• BIP 21: URI Scheme (article) Canonical standard for `bitcoin:` URIs, amount encoding, and optional parameters.
• Mastering Bitcoin (book) Broad technical reference for addresses, wallet payment flows, and the request formats layered on top of them.

Direct prerequisites (1)

• Addresses and Outputs

Direct dependents (0)

• None

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