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Lazarus Pool public API

Everything the site draws itself with is a public JSON endpoint. No key, no account, no signature, CORS open, and the same numbers the pages show. Responses carry short cache headers; honour them and you can poll as often as you like.

Stable fields, as of 2026-10-10: they are not renamed or removed without a dated notice on this page. The date of the notice is the day the change is written here. Any field an endpoint does not list may change.

Public endpoints. GET, JSON, no authentication.
Endpoint	What it returns
`/api/pool`	Hashrate, the TIDES window, fees, blocks found, and the DATUM connection.
`/api/coinbaser`	The coinbase output list Prime is handing out for the next block.
`/api/blocks`	Recent blocks on the chain, as the explorer lists them. Not the pool's own found-block list.
`/api/found/{blockhash}`	The coinbase outputs one block the pool found actually paid.
`/api/miners`	Addresses with a live session or recent accepted work, and their window share.
`/api/miner/{address}`	One address: hashrate, window share, what it has been paid, and the last 24 hours.
`/api/gateways`	DATUM gateways Prime knows, connected or only historic.
`/api/payouts`	Coinbase payouts already made, one object per block. Per-address amounts are on /api/found/{blockhash}.
`/api/solo`	Solo miners and blocks found on the solo endpoints.
`/api/solo/{address}`	One address on the solo book.
`/api/price`	The XBT price the site converts with.
`/api/v1/prices`	The same price in the shape of a mempool /api/v1/prices document.
`/api/hardware`	Siacoin ASIC list with prices and estimated XBT per day.
`/api/rentals`	BLAKE2b rigs listed for rent, with the estimated XBT per day through your own DATUM gateway.
`/api/history`	Pool hashrate over a range, and the blocks the pool found in that range.
`/api/makegoods`	Make-goods the pool owes or has paid, one row per block.
`/api/gateway-builds`	Which DATUM gateway builds the site recommends, in the order it recommends them.
`/api/openapi.json`	This field list as an OpenAPI 3.1 document.

Fields a client may rely on

`/api/pool`

Hashrate, the TIDES window, fees, blocks found, and the DATUM connection.

Fields a client may rely on
Field	Type	Unit	Meaning
`name`	string	—	Pool name.
`blocks_found`	integer	count	Blocks this pool has recorded. Not rewritten from the explorer.
`last_found_height`	integer	blocks	Height of the newest block this pool has recorded.
`blocks_found_explorer`	integer	count	The explorer's block count for this pool at the last successful check.
`blocks_found_checked_at`	integer	unix seconds	When that check succeeded.
`pool_hr_ghs`	number	GH/s	Credited pool hashrate.
`height`	integer	blocks	Chain height last read from the node.
`difficulty`	number	—	Network difficulty last read from the node.
`miners_online`	integer	count	Payout addresses with a live session.
`fees.datum_percent`	number	percent	Fee on work that arrives through a miner's own DATUM gateway.
`fees.stratum_percent`	number	percent	Fee on work that arrives through the public stratum.
`fees.custody.percent`	number	percent	Custody fee a make-good for a pool-only or partial coinbase keeps, from fees.custody.from_height on, from each payee whose own gateway is producing such coinbases. Miners on current gateways are paid in full. 0 when there is none.
`fees.custody.from_height`	integer	blocks	First block whose make-goods carry the custody fee. 0 when there is none.
`datum.pool_host`	string	—	Host a DATUM gateway connects to.
`datum.pool_port`	integer	port	Port a DATUM gateway connects to.
`datum.pool_pubkey`	string	hex	Pool public key a gateway must pin. Empty until Prime has published one.
`datum.min_diff`	integer	share difficulty	Smallest share difficulty Prime accepts, and the vardiff floor it sends. Present only when Prime's stats include pool.min_diff.
`payout_scheme`	string	—	How a found block is paid.
`updated`	integer	unix seconds	When this document was built.

Any other field in this response may change.

`/api/coinbaser`

The coinbase output list Prime is handing out for the next block.

Fields a client may rely on
Field	Type	Unit	Meaning
`scheme`	string	—	Payout scheme this split belongs to.
`value`	integer	sats	Coinbase value the split is computed against.
`miner_sats`	integer	sats	Sum of the miner outputs.
`pool_sats`	integer	sats	The pool output.
`fee_sats`	integer	sats	Fee inside the pool output.
`fee_percent`	number	percent	Fee as a percent of the coinbase value.

Any other field in this response may change.

`/api/blocks`

Recent blocks on the chain, as the explorer lists them. Not the pool's own found-block list.

Fields a client may rely on
Field	Type	Unit	Meaning
`blocks[].height`	integer	blocks	Block height.
`blocks[].id`	string	hex	Block hash.
`blocks[].timestamp`	integer	unix seconds	Block time.
`blocks[].pool`	string	—	Pool name the explorer assigned.

Any other field in this response may change.

`/api/found/{blockhash}`

The coinbase outputs one block the pool found actually paid.

Fields a client may rely on
Field	Type	Unit	Meaning
`hash`	string	hex	Block hash asked for.
`outputs[].address`	string	—	Output address.
`outputs[].btc`	number	XBT	Amount of this output.
`outputs[].share`	number	fraction	This output's fraction of the coinbase.
`outputs[].to`	string	—	miner or pool.

Any other field in this response may change.

`/api/miners`

Addresses with a live session or recent accepted work, and their window share.

Fields a client may rely on
Field	Type	Unit	Meaning
`online[].address`	string	—	Payout address.
`online[].hr_ghs`	number	GH/s	Credited hashrate of that address.
`online[].window_percent`	number	percent	That address's share of the TIDES window.

Any other field in this response may change.

`/api/miner/{address}`

One address: hashrate, window share, what it has been paid, and the last 24 hours.

Fields a client may rely on
Field	Type	Unit	Meaning
`address`	string	—	The address asked for.
`hr_ghs`	number	GH/s	Credited hashrate.
`window_sats`	integer	sats	This address's next coinbase output.
`paid_btc`	number	XBT	Mature coinbase already credited to this address.
`blocks_found`	array	—	Coinbase outputs paid to this address, newest first, one page. Page with ?payouts_offset=N&payouts_limit=M (M up to 200, default 50).
`payouts_total`	integer	blocks	How many rows blocks_found has in all. Null when it could not be counted.
`payouts_offset`	integer	blocks	Offset of this page.
`payouts_limit`	integer	blocks	Page size used.
`earned_24h`	object	—	Earnings from blocks found in the last 24 hours. Null when a coinbase in that window cannot be read. When it is an object, block_sats, makegood_sats and total_sats are sats; makegood_sats counts make-goods at what they pay, after the custody fee in makegood_custody_fee_sats.
`makegoods[].sats`	integer	sats	What a partial or pool-only coinbase left unpaid to this address: the gross its make-good owes.
`makegoods[].custody_fee_sats`	integer	sats	Custody fee the make-good keeps from that gross. Charged only to a payee whose own gateway is producing pool-only or partial coinbases, as the fee wallet recorded when it signed; 0 for everyone else, before the fee's start height, before the make-good is signed, or when the rest would be under the address's dust floor.
`makegoods[].net_sats`	integer	sats	What the make-good pays: sats less custody_fee_sats.
`makegood_pending_btc`	number	XBT	Make-goods still on their way to this address, net of the custody fee.
`makegood_custody_fee_sats`	integer	sats	Custody fee kept from this address's pending and paid make-goods.
`custody_fee_percent`	number	percent	The custody fee on make-goods for pool-only and partial coinbases. 0 when there is none.
`custody_from_height`	integer	blocks	First block whose make-goods carry the custody fee. 0 when there is none.
`gateway_outdated`	boolean	—	True while this address is the payout identity of a connected DATUM gateway on an out-of-date build: its latest block in the last 30 days was pool-only or partial, or it sends pool-only work (at least 10% of 200 or more accepted jobs). The same rule decides who pays the custody fee.
`gateway_outdated_reason`	string	—	Why, in a few words. Also set when gateway_outdated is false but a make-good in the last 7 days carried a custody fee; empty otherwise.

Any other field in this response may change.

`/api/gateways`

DATUM gateways Prime knows, connected or only historic.

Fields a client may rely on
Field	Type	Unit	Meaning
`reachable`	boolean	—	Whether Prime's stats could be read.
`gateways[].gateway`	string	hex	Gateway signing-key prefix.
`gateways[].own`	boolean	—	True when this session is the pool's own public stratum.
`gateways[].offline`	boolean	—	True when the gateway is not connected now.

Any other field in this response may change.

`/api/payouts`

Coinbase payouts already made, one object per block. Per-address amounts are on /api/found/{blockhash}.

Fields a client may rely on
Field	Type	Unit	Meaning
`scheme`	string	—	Payout scheme.
`payouts[].height`	integer	blocks	Block height.
`payouts[].hash`	string	hex	Block hash.
`payouts[].miner_btc`	number	XBT	Miner outputs on this block, added together.
`payouts[].output_count`	integer	—	How many coinbase outputs this block paid.

Any other field in this response may change.

`/api/solo`

Solo miners and blocks found on the solo endpoints.

Fields a client may rely on
Field	Type	Unit	Meaning
`enabled`	boolean	—	Whether a solo endpoint answered.
`blocks_found`	integer	count	Solo blocks recorded.
`hashrate_ghs`	number	GH/s	Solo hashrate the endpoints reported.

Any other field in this response may change.

`/api/solo/{address}`

One address on the solo book.

Fields a client may rely on
Field	Type	Unit	Meaning
`address`	string	—	The address asked for.
`found`	boolean	—	Whether this address is on the solo book.

Any other field in this response may change.

`/api/price`

The XBT price the site converts with.

Fields a client may rely on
Field	Type	Unit	Meaning
`USD`	number	USD per XBT	Last price. Null when no book could be read and none is cached.
`time`	integer	unix seconds	When the price was read.
`stale`	boolean	—	True when this is a cached price from a failed refresh.
`pair`	string	—	Which coin the price is for.

Any other field in this response may change.

`/api/v1/prices`

The same price in the shape of a mempool /api/v1/prices document.

Fields a client may rely on
Field	Type	Unit	Meaning
`time`	integer	unix seconds	When the price was read.
`USD`	number	USD per XBT	Last price, when one is known.

Any other field in this response may change.

`/api/hardware`

Siacoin ASIC list with prices and estimated XBT per day.

Fields a client may rely on
Field	Type	Unit	Meaning
`source`	string	—	Where the machine list comes from.
`price_usd`	number	USD per XBT	Price used to turn XBT per day into dollars.
`ths_btc_day`	number	XBT per TH/s per day	Live estimate through a DATUM gateway at 0% fee.
`miners[].ths`	number	TH/s	Nameplate hashrate.
`miners[].xbt_day`	number	XBT per day	Estimated earnings at ths_btc_day. Null when that rate is unknown.

Any other field in this response may change.

`/api/rentals`

BLAKE2b rigs listed for rent, with the estimated XBT per day through your own DATUM gateway.

Fields a client may rely on
Field	Type	Unit	Meaning
`source`	string	—	Where the rental list comes from.
`price_usd`	number	USD per XBT	Price used for the dollar column.
`ths_btc_day`	number	XBT per TH/s per day	Rate the estimates use. Null when the pool has not published one.
`rigs`	array	—	The rigs. The fields inside a rig may change.

Any other field in this response may change.

`/api/history`

Pool hashrate over a range, and the blocks the pool found in that range.

Fields a client may rely on
Field	Type	Unit	Meaning
`range`	string	—	The range asked for.
`step_s`	integer	seconds	Width of one hashrate point.
`points`	array	—	Rows of [unix seconds, GH/s, miner count].
`blocks[].height`	integer	blocks	A block the pool found in the range.
`blocks[].hash`	string	hex	That block's hash.

Any other field in this response may change.

`/api/makegoods`

Make-goods the pool owes or has paid, one row per block.

Fields a client may rely on
Field	Type	Unit	Meaning
`tip`	integer	blocks	Chain height used to judge maturity. 0 when the node did not answer.
`pending_sats`	integer	sats	Sats still owed, net of the custody fee.
`custody_fee_sats`	integer	sats	Custody fee kept from make-goods that are pending or paid.
`blocks`	array	—	One object per block. Fields inside a block not listed here may change.
`blocks[].owed_sats`	integer	sats	What that block's coinbase left unpaid to miners, before the custody fee.
`blocks[].custody_fee_sats`	integer	sats	Custody fee that block's make-good keeps.
`blocks[].net_sats`	integer	sats	What that block's make-good pays: owed_sats less custody_fee_sats.

Any other field in this response may change.

`/api/gateway-builds`

Which DATUM gateway builds the site recommends, in the order it recommends them.

Fields a client may rely on
Field	Type	Unit	Meaning
`gateways[].id`	string	—	Stable id for that gateway line.
`gateways[].name`	string	—	Name shown on the site.

Any other field in this response may change.

`/api/openapi.json`

This field list as an OpenAPI 3.1 document.

Two of these take an address and are deliberately excluded from search indexing, since one page per address is infinite and identical: /api/miner/<address> and /api/solo/<address>. If you are building something on this and need a field that is not there, the pool server is one Python file and the endpoint you want is probably a few lines — say so and it can be added.