Chains API

Which Solana slots produced a block, and which were skipped

From a start slot forward, the slots that produced a finalized block and the slots in between whose leader produced nothing, paged by block count, back to genesis.

GET/api/external/chain-analysis/confirmed-blocks/{chain}

Get a free API key Try it in the API reference

What it returns

Walks forward from startSlot and returns up to limit slots that produced a finalized block, plus every slot in between that was skipped (its leader produced no block). The page covers startSlot to endSlot inclusive, where endSlot is the last block on the page; every slot in that span is in exactly one of blockSlots and skippedSlots. To read the next page, ask again with startSlot = endSlot + 1. reachedTip is true when fewer than limit blocks came back: the newest finalized block was reached, and slots after it are not described yet. A startSlot above the newest finalized block answers no blocks, endSlot: null and reachedTip: true. History goes back to slot 0.

Chains

Solana SOL

Request

Send your key in the x-dex-data-key header. Replace each <placeholder> with a real value.

curl -H "x-dex-data-key: $DEXDATA_API_KEY" \
  "https://api.dexdata.io/api/external/chain-analysis/confirmed-blocks/SOL?startSlot=<startSlot>"

Parameters
Parameter	Description
`startSlot` query · integer · required	The first slot to describe (inclusive).
`limit` query · integer · optional	How many block-producing slots to return: 1 to 1000. Defaults to 100.
`chain` path · string · required	SOL only; every other chain returns 400. Solana names its block heights slots, and a slot whose leader produced nothing is skipped — a question other chains do not have.

Response fields

A JSON response. Every field is always present; null means the value could not be established, never zero.

Response fields of Which Solana slots produced a block, and which were skipped
Field	Type	Description
`startSlot`	integer	Echoes the request.
`endSlot`	integer \| null	The last block-producing slot on this page; null when no finalized block exists at or after `startSlot` yet.
`reachedTip`	boolean	True when fewer than `limit` blocks came back: the page ends at the newest finalized block.
`blockCount`	integer	Length of `blockSlots`.
`skippedCount`	integer	Length of `skippedSlots`. 0 is a real answer: nothing in the span was skipped.
`blockSlots`	integer[]	Slots that produced a finalized block, ascending.
`skippedSlots`	integer[]	Slots from `startSlot` to `endSlot` that produced no block, ascending.

Price per call

Solana: 3 credits

Charged only when the call succeeds. Prices as of 2026-10-30; the current ones are always in the API reference.

The newest blocks on a chain
The EVM-chain counterpart: the newest blocks with hashes and times, where no slot is ever skipped.
Which Solana validator will produce each upcoming slot
Which scheduled slots actually produced a block, and which leaders skipped theirs.
What one Solana slot did
Which slots in a range produced a block, vs what one named slot actually did.
Solana validators: stake, commission, voting and blocks produced
The slots behind the per-validator skipped-slot counts.
What it costs to land a Solana transaction right now
The base fee per signature in lamports, and the priority fee per compute unit in micro-lamports at the 25th, 50th, 75th and 95th percentiles of the last 150 slots. SOL only.
The newest validator withdrawals on Ethereum
The newest beacon-chain withdrawals credited on Ethereum (validator, receiver, amount, block) and the total number processed so far.

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