# blockspace.to > Tracks spent sats. A Blockspace Labs product. blockspace.to is an explorer of Blockspace Holdings (https://blockspace.holdings/). ## Pages - [blockspace.to](https://www.blockspace.to/): Tracks spent sats. A Blockspace Labs product. - [About blockspace.to](https://www.blockspace.to/about): What blockspace.to is and how it tracks spent sats. - [Inscriptions](https://www.blockspace.to/inscriptions): The latest inscriptions. - [Runes](https://www.blockspace.to/runes): The latest runes. - [Collections](https://www.blockspace.to/collections): Inscription collections. - [Galleries](https://www.blockspace.to/galleries): Inscription galleries. - [Blocks](https://www.blockspace.to/blocks): The latest blocks. - [Clock](https://www.blockspace.to/clock): The block clock. - [Status](https://www.blockspace.to/status): The index's height and counts. ## Data and API ord's data pages answer in JSON when sent `Accept: application/json`. Query; please don't crawl. - [A spent output, block 170](https://www.blockspace.to/output/f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16:0): `spent` plus `sat_ranges`, kept by the spent-sats index after the output is spent. - `https://www.blockspace.to/output/:`: an output, spent or unspent, with its sat ranges. - `https://www.blockspace.to/sat/`: a sat. - `https://www.blockspace.to/inscription/`: an inscription. - `https://www.blockspace.to/block/`: a block. - [Status](https://www.blockspace.to/status): the index height and counts. - [ord's documentation](https://docs.ordinals.com/): the full API. ## Part of Blockspace Holdings - [Blockspace Holdings](https://blockspace.holdings/): the holding company and every property. - [blockspace.to on blockspace.wiki](https://blockspace.wiki/projects/blockspace.to/): its page in the estate's knowledge hub, with its glossary and FAQ. - [Blockspace Labs](https://blockspacelabs.com/): Research and development (R&D). ## Machine surfaces - [Manifest](https://www.blockspace.to/.well-known/blockspace.json): this host and its surfaces as JSON; the estate's master copy is https://blockspace.holdings/.well-known/blockspace.json. - [Sitemap](https://www.blockspace.to/sitemap.xml)