Jito announced on September 9, 2026 that its Block Assembly Marketplace (BAM) will sell Solana traders early access to transaction preconfirmations. The service, delivered through partners such as Helius and Triton, streams messages the moment a slot leader commits to executing a scheduled batch, offering a median advantage of five to ten milliseconds over existing shred‑based feeds, according to CryptoSlate.

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How the BAM feed works

In Solana’s architecture, a validator that wins a slot builds a block and then distributes the transactions as shreds. BAM inserts a preconfirmation step: once the leader accepts a batch, it emits a message indicating the batch will be executed in order. This message arrives before the shreds are created, giving subscribers a brief head‑start. Importantly, the feed does not grant any right to reorder or front‑run the transactions; the execution sequence remains locked once the leader commits.

Pricing and subscription model

Helius packages the BAM feed into four paid tiers—Developer, Business, Professional and Enterprise—excluding free accounts. Pricing is expressed in credits: each slot that delivers at least one preconfirmation costs the greater of 300 credits or 10 credits per message. For example, ten delivered messages cost 300 credits, while a hundred cost 1,000 credits. Credits are billed monthly and are not tied to a fixed dollar amount per trade. Concurrent subscriptions are billed separately, and slots with no messages incur no charge.

Revenue sharing and validator participation

The commercial arrangement allocates 35% of preconfirmation revenue to the validators that produce the streams, 35% to the Jito DAO, and 30% to the distributors. Validators running the AgaveBAM or FireBAM software are automatically opted in; they may opt out via a ticket to Jito’s developer Discord, though a self‑service toggle is not yet available. Payments are made after the month’s end, using priority fees attached to market‑tick transactions. Validators that deviate from their commitments can be disconnected, ensuring the integrity of the feed.

Coverage and limitations

As of November 7, 2026, about 39.1% of Solana’s stake was on validators that support BAM, according to the network’s public stake API. However, this figure does not guarantee uninterrupted coverage because non‑BAM leaders and opted‑out validators do not emit preconfirmations. Helius warns users to expect gaps, and the early‑test advantage of 5‑10 ms is not guaranteed for every transaction. Moreover, the preconfirmation describes what will execute only if the block lands; a leader can still skip its slot or end up on a fork.