fascinating how Bitcoin creates and consumes tens of thousands of utxos every ~10 minutes. opencloudtech.xyz/tools/bloc…

An API request that returns a 402 (payment required). Pay 1 sat over Lightning, and the same request succeeds. Or buy prepaid credits and use them as needed. No accounts. No API keys. No KYC. Machine-to-machine payments for APIs. LN402 demo by Open Cloud Engineers.

Fee estimation isn’t a single number. It’s a range, a probability, and a set of tradeoffs: confirmation target, mempool depth, recent blocks, and variance across sources. Fee Planner makes those factors visible: opencloudtech.xyz/tools/fee-…

in block 364,292, a single large transaction consumed most of the block before SegWit, blocks were limited by raw size this illustrated why size-based limits were fragile, and why Bitcoin later moved to weight-based blocks opencloudtech.xyz/tools/bloc…

If you ever wondered how Bitcoin addresses are constructed, from xpubs and derivation paths to scripts and addresses Address Builder makes that process visible. opencloudtech.xyz/tools/addr…

Our Wallet Construction Lab helps explore how Bitcoin wallets are built. Step by step: entropy > mnemonic > seed > master keys > extended keys > derivation paths. built to understand how wallets work under the hood; not to generate real wallets. opencloudtech.xyz/tools/wall…

This transaction spends 71 inputs to create 1 output. This pattern is likely a UTXO consolidation. Tx Lens shows the full structure behind it. opencloudtech.xyz/tools/tx-l…

This block reduced the UTXO set by 3,192 outputs. Visualizing block impact helps understand how Bitcoin state changes. Block Lens: opencloudtech.xyz/tools/bloc…