The blockspace.to ord API

blockspace.to is the explorer built into ord, the ordinals indexer, run by Blockspace Holdings as one process with its indexer. It is a fork of ord 0.27.1 that also indexes spent sat ranges (spent sats). It indexes sats, inscriptions, runes, addresses and transactions; its own /status says so (below). block.space's inscription pages and BTI both read it.

Asking for JSON #

The ord API guide: the server returns JSON instead of HTML when the request carries the header Accept: application/json, and the objects follow what the HTML pages show. For example:

curl -s -H "Accept: application/json" https://blockspace.to/status

Responses allow cross-origin reads (access-control-allow-origin: *).

Endpoints #

The guide lists these JSON endpoints (all GET unless marked):

The guide also lists POST /offer and GET /offers (PSBT offers) and /install.sh; they are not data endpoints. The fork's guide documents no endpoint of its own for spent sat ranges.

Recursive endpoints #

The /r/ endpoints are the ones an inscription can call from inside its own content (recursion). They answer JSON without the Accept header: /r/blockhash, /r/blockhash/<height>, /r/blockheight, /r/blockinfo/<query>, /r/blocktime, /r/children/<id> (and paged, and /inscriptions), /r/parents/<id> (likewise), /r/inscription/<id>, /r/metadata/<id>, /r/undelegated-content/<id>, /r/sat/<sat>, /r/sat/<sat>/<page>, /r/sat/<sat>/at/<index> and its /content, /r/tx/<txid> and /r/utxo/<outpoint>.

/content and brotli #

/content/<id> returns an inscription's raw content. An inscription stored with content-encoding: br gets a 406 unless the request accepts brotli, so send Accept-Encoding: br and decode the answer; block.space's thumbnailer does exactly that; it had met 38 such inscriptions by 2026-10-19. With the header, the response carries content-encoding: br. Content responses are served cache-control: public, max-age=1209600, immutable.

Examples #

All read 2026-10-20 at 09:44 UTC with Accept: application/json; the public form is shown.

https://blockspace.to/status:

{"address_index": true, "blessed_inscriptions": 127697344, "chain": "mainnet",
 "cursed_inscriptions": 472043, "height": 972303, "inscription_index": true,
 "inscriptions": 128169387, "json_api": true, "lost_sats": 2895844904,
 "minimum_rune_for_next_block": "LLGKX", "rune_index": true, "runes": 216409,
 "sat_index": true, "started": "2026-10-18T13:35:35.217254841Z",
 "transaction_index": true, "unrecoverably_reorged": false}

The wiki reads the same endpoint every hour: on its latest reading (as of block 972,304, 2026-10-20 10:17:29 UTC) ord was at block 972304 with 128,169,401 inscriptions, 472,043 of them cursed, and 2,895,844,904 lost sats.

https://blockspace.to/r/blockheight:

972303

https://blockspace.to/inscription/269730d6cd8c0795317bb8fd043fc7cecb147bb98ae0fed1a1ca9cc646a0c6a2i0, trimmed (the largest inscription on block.space's board):

{"id": "269730d6cd8c0795317bb8fd043fc7cecb147bb98ae0fed1a1ca9cc646a0c6a2i0",
 "address": "bc1pxj0y2yddwd2vccy9tf29czjun97ssmnyxt4n7w0y7ch9w93w5w8sanhtax",
 "charms": ["vindicated"], "child_count": 6,
 "content_length": 3969429, "content_type": "text/html;charset=utf-8",
 "fee": 49979388, "height": 873893, "metaprotocol": null}

https://blockspace.to/r/inscription/269730d6cd8c0795317bb8fd043fc7cecb147bb98ae0fed1a1ca9cc646a0c6a2i0, trimmed:

{"number": 79351656, "output": "14580fd5072a0e96d8e0e6b1526319fde391d788b80a17eee23bf91ee1f961b2:6",
 "sat": 257704999999999, "satpoint": "14580fd5…f961b2:6:0", "timestamp": 1733723872, "value": 10000}

https://blockspace.to/sat/257704999999999, trimmed:

{"number": 257704999999999, "name": "mahbufyxugw", "block": 51540, "rarity": "common",
 "decimal": "51540.4999999999", "percentile": "12.271666680165458%",
 "inscriptions": ["269730d6cd8c0795317bb8fd043fc7cecb147bb98ae0fed1a1ca9cc646a0c6a2i0"]}

https://blockspace.to/rune/UNCOMMON•GOODS, trimmed:

{"id": "1:0", "mintable": true,
 "entry": {"spaced_rune": "UNCOMMON•GOODS", "symbol": "⧉", "number": 0, "block": 1,
           "mints": 165723114, "burned": 24212, "divisibility": 0, "premine": 0, "turbo": true}}

https://blockspace.to/output/14580fd5072a0e96d8e0e6b1526319fde391d788b80a17eee23bf91ee1f961b2:6, trimmed:

{"value": 10000, "spent": false, "indexed": true, "confirmations": 98199,
 "inscriptions": ["269730d6cd8c0795317bb8fd043fc7cecb147bb98ae0fed1a1ca9cc646a0c6a2i0"],
 "runes": {}}

The output's sat_ranges field lists its sats as [start, end) pairs.

A known defect #

As of 2026-10-20 the server's operating notes record one defect: ord 0.27.1 cannot decode Bitcoin Core 28's "anchor" (P2A) script type, so a page for a transaction with such an output fails with "error serving request".

Related #

• The block.space board APIs
• The explore.block.space API
• blockspace.to
• ord
• Spent sats (blockspace.to)

Sources #

1. ord /status (the blockspace.to ord server) · blockspace.to/status
2. blockspace.to ord JSON API, read-only GETs with Accept: application/json · blockspace.to/status
3. Blockspace Holdings records