Blockspace itself markets
Where new blockspace trades: 6 venues, from blockspace.markets' directory.
Where new blockspace is bought: the fee market and the services that sell priority. 6 venues in blockspace.markets' directory, 6 of them live, as of 2026-10-21. Listed by name; nothing here is a ranking or a recommendation. Every fact gives its source and date; a source marked third-party is not the venue's own; "not found" means the directory found no source for it. Dead venues stay listed with the date they were checked.
The directory, with the same rows: blockspace.markets/markets/.
Binance Pool Transaction Accelerator #
- Type
- accelerator
- Settlement
- custodial
- Custody
- custodial
- Status
- live, checked 2026-10-21 (evidence)
- Fees
- not found
- API
- none
- Volume
- not found
- On the buy board
- not read: no listing book
Scheduled to close with Binance Pool on 2026-11-10 07:00 UTC (third-party report; Binance's own announcement not retrieved). Price model not verified; access was limited to VIP users and a Telegram channel.
Sources:
- decrypt.co/380870/binance-shutting-down-bitcoin-mining-pool, 2026-10-21 (third-party)
- www.nobsbitcoin.com/binance-pool-launches-btc-transaction-accelerator, 2026-10-21 (third-party)
Bitcoin public fee market (the mempool) #
- Type
- fee-market
- Settlement
- on-chain
- Custody
- non-custodial
- Status
- live, checked 2026-10-21
- Fees
- not found
- API
- open · docs
- Volume
- not found
- On the buy board
- not read: no listing book
A pay-as-bid auction on fee rate (sat/vB), paid inside the transaction to the miner that includes it; bids can be raised with RBF or CPFP. On 2026-10-21 the next-block estimate was 1 sat/vB and the precise floor 0.1 sat/vB.
Sources:
- mempool.space/docs/api/rest, 2026-10-21
- developer.bitcoin.org/reference/rpc/estimatesmartfee.html, 2026-10-21
Luxor Derivatives (hashrate forwards) #
- Type
- derivative
- Settlement
- off-chain
- Custody
- not found
- Status
- live, checked 2026-10-21 (evidence)
- Fees
- not found
- API
- none
- Volume
- not found
- On the buy board
- not read: no listing book
A derivative on hashrate and hashprice, not a claim on block inclusion; fees are only indirect exposure. Physically or cash settled OTC forwards after KYC/AML and ISDA onboarding; no fee schedule published; API not verified.
Sources:
- luxor.tech/derivatives, 2026-10-21
- hashrateindex.com/blog/luxor-hashrate-lookback-series-september-2026, 2026-10-21
- www.theblock.co/post/175588/luxor-launches-derivatives-product-based-on-bitcoin-mining-revenue, 2026-10-21 (third-party)
MARA Slipstream #
- Type
- accelerator
- Settlement
- on-chain
- Custody
- non-custodial
- Status
- live, checked 2026-10-21 (evidence)
- Fees
- Minimum fee rate is the higher of 1x the current mempool priority fee rate or 1 sat/vByte; volume discounts by contact · slipstream.mara.com/docs/openapi.json, 2026-10-21
- API
- open · docs
- Volume
- not found
- On the buy board
- not read: not read yet
Direct submission to MARA Pool's private mempool, meant for non-standard or large transactions; the fee goes inside the transaction and it only reaches blocks MARA Pool mines. A 2026-08-03 report that it became free and permissionless is not verified.
Sources:
- slipstream.mara.com, 2026-10-21
- slipstream.mara.com/docs/openapi.json, 2026-10-21
- slipstream.mara.com/api/system, 2026-10-21
- slipstream.mara.com/api/rates, 2026-10-21
- bitcoinmagazine.com/technical/marathon-launches-slipstream-tech-stack-to-process-non-standard-bitcoin-transactions, 2026-10-21 (third-party)
- www.odaily.news/en/newsflash/506315, 2026-10-21 (third-party)
Mempool Accelerator (mempool.space) #
- Type
- accelerator
- Settlement
- off-chain
- Custody
- custodial
- Status
- live, checked 2026-10-21 (evidence)
- Fees
- Acceleration cost includes the fee to boost to your selected target fee rate and the Mempool Accelerator service fee; no numeric service-fee rate published · mempool.space/accelerator, 2026-10-21
- API
- open · docs
- Volume
- not found
- On the buy board
- not read: not read yet
Paid off chain (Lightning, Cash App Pay, Apple Pay, Google Pay; Pro accounts preload credit) and relayed to partner mining pools; an acceleration cannot be modified or canceled by the user. Read endpoints are open; account endpoints need a login.
Sources:
- mempool.space/accelerator, 2026-10-21
- mempool.space/docs/api/rest, 2026-10-21
- mempool.space/enterprise, 2026-10-21
- mempool.space/api/v1/services/accelerator/accelerations/history, 2026-10-21
- www.theblock.co/post/307972/mempool-launches-off-chain-accelerator-bitcoin-transactions, 2026-10-21 (third-party)
ViaBTC Transaction Accelerator #
- Type
- accelerator
- Settlement
- custodial
- Custody
- custodial
- Status
- live, checked 2026-10-21 (evidence)
- Fees
- 0 free accelerations per hour shown; paid fee shown after entering a TXID and deducted from your ViaBTC account; non-cancellable and non-refundable · www.viabtc.com/tools/txaccelerator, 2026-10-21
- API
- none
- Volume
- more than 800,000 transactions, since 2016 · www.viabtc.com/en/blog/News-viabtc-partners-with-mempool-to-expand-access-to-btc-transaction-acceleration-services-802, 2026-09-16
- On the buy board
- not read: no listing book
Pool priority at ViaBTC; a sign-in is required and payment is in BTC, BCH or LTC. A 2026-09-16 partnership with Mempool is announced, but how it works is not verified.
Sources:
- www.viabtc.com/tools/txaccelerator, 2026-10-21
- www.viabtc.com/en/blog/News-viabtc-partners-with-mempool-to-expand-access-to-btc-transaction-acceleration-services-802, 2026-10-21
- en.bitcoin.it/wiki/Transaction_accelerator, 2026-10-21 (third-party)
Related #
Sources #
Updated 2026-10-21 · This page as Markdown