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• get_address

  Retrieve address information including current balance and transaction counts. Supports all standard Bitcoin address types (P2PKH, P2SH, P2WPKH, P2WSH, P2TR). *[Mempool.space docs](https://mempool.space/docs/api/rest#get-address)* REST operation: `GET /api/address/{address}`.

• get_address_confirmed_txs

  Get the first 25 confirmed transactions for an address. For pagination, request `GET /api/address/{address}/txs/chain/{after_txid}` with the last returned txid. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-address-transactions-chain)* REST operation: `GET /api/address/{address}/txs/chain`.

• get_address_confirmed_txs_after

  Get the next 25 confirmed transactions strictly older than `after_txid` (Esplora-canonical pagination form, matches mempool.space). *[Mempool.space docs](https://mempool.space/docs/api/rest#get-address-transactions-chain)* REST operation: `GET /api/address/{address}/txs/chain/{after_txid}`.

• get_address_hash_prefix_matches

  Find addresses by address type and by the first 1-16 hex nibbles of RapidHash v3 over the raw address payload bytes. Intended for privacy-preserving client-side wallet discovery without sending raw addresses or xpubs. Fetch metadata with `GET /api/address/{address}`. REST operation: `GET /api/address/hash-prefix/{addr_type}/{prefix}`.

• get_address_mempool_txs

  Get unconfirmed transactions for an address from the mempool, newest first (up to 50). *[Mempool.space docs](https://mempool.space/docs/api/rest#get-address-transactions-mempool)* REST operation: `GET /api/address/{address}/txs/mempool`.

• get_address_txs

  Get transaction history for an address, newest first. Returns up to 50 mempool transactions plus a confirmed page sized to fill the response to 50 total (chain floor of 25, so 25-50 confirmed depending on mempool weight). To paginate further confirmed history, request `GET /api/address/{address}/txs/chain/{after_txid}` with the last returned txid. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-address-transactions)* REST operation: `GET /api/address/{address}/txs`.

• get_address_utxos

  Get unspent transaction outputs (UTXOs) for an address. Returns txid, vout, value, and confirmation status for each UTXO. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-address-utxo)* REST operation: `GET /api/address/{address}/utxo`.

• get_block

  Retrieve block information by block hash. Returns block metadata including height, timestamp, difficulty, size, weight, and transaction count. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-block)* REST operation: `GET /api/block/{hash}`.

• get_block_by_height

  Retrieve the block hash at a given height. Returns the hash as plain text. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-block-height)* REST operation: `GET /api/block-height/{height}`.

• get_block_by_timestamp

  Find the block closest to a given UNIX timestamp. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-block-timestamp)* REST operation: `GET /api/v1/mining/blocks/timestamp/{timestamp}`.

• get_block_fee_rates

  Get block fee rate percentiles (min, 10th, 25th, median, 75th, 90th, max) for a time period. Valid periods: `24h`, `3d`, `1w`, `1m`, `3m`, `6m`, `1y`, `2y`, `3y`. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-block-feerates)* REST operation: `GET /api/v1/mining/blocks/fee-rates/{time_period}`.

• get_block_fees

  Get average total fees per block for a time period. Valid periods: `24h`, `3d`, `1w`, `1m`, `3m`, `6m`, `1y`, `2y`, `3y`. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-block-fees)* REST operation: `GET /api/v1/mining/blocks/fees/{time_period}`.

• get_block_header

  Returns the hex-encoded 80-byte block header. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-block-header)* REST operation: `GET /api/block/{hash}/header`.

• get_block_rewards

  Get average coinbase reward (subsidy + fees) per block for a time period. Valid periods: `24h`, `3d`, `1w`, `1m`, `3m`, `6m`, `1y`, `2y`, `3y`. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-block-rewards)* REST operation: `GET /api/v1/mining/blocks/rewards/{time_period}`.

• get_block_sizes_weights

  Get average block sizes and weights for a time period. Valid periods: `24h`, `3d`, `1w`, `1m`, `3m`, `6m`, `1y`, `2y`, `3y`. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-sizes-weights)* REST operation: `GET /api/v1/mining/blocks/sizes-weights/{time_period}`.

• get_block_status

  Retrieve the status of a block. Returns whether the block is in the best chain and, if so, its height and the hash of the next block. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-block-status)* REST operation: `GET /api/block/{hash}/status`.

• get_block_tip_hash

  Returns the hash of the last block. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-block-tip-hash)* REST operation: `GET /api/blocks/tip/hash`.

• get_block_tip_height

  Returns the height of the last block. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-block-tip-height)* REST operation: `GET /api/blocks/tip/height`.

• get_block_txid

  Retrieve a single transaction ID at a specific index within a block. Returns plain text txid. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-block-transaction-id)* REST operation: `GET /api/block/{hash}/txid/{index}`.

• get_block_txs_from_index

  Retrieve transactions in a block by block hash, starting from the specified index. Returns up to 25 transactions at a time. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-block-transactions)* REST operation: `GET /api/block/{hash}/txs/{start_index}`.

• get_block_v1

  Returns block details with extras by hash. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-block-v1)* REST operation: `GET /api/v1/block/{hash}`.

• get_blocks

  Retrieve the last 10 blocks. Returns block metadata for each block. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-blocks)* REST operation: `GET /api/blocks`.

• get_blocks_from_height

  Retrieve up to 10 blocks going backwards from the given height. For example, height=100 returns blocks 100, 99, 98, ..., 91. Height=0 returns only block 0. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-blocks)* REST operation: `GET /api/blocks/{height}`.

• get_blocks_v1

  Retrieve the last 15 blocks with extended data including pool identification and fee statistics. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-blocks-v1)* REST operation: `GET /api/v1/blocks`.

• get_blocks_v1_from_height

  Retrieve up to 15 blocks with extended data going backwards from the given height. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-blocks-v1)* REST operation: `GET /api/v1/blocks/{height}`.

• get_cpfp

  Returns ancestors and descendants for a CPFP (Child Pays For Parent) transaction, including the effective fee rate of the package. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-children-pay-for-parent)* REST operation: `GET /api/v1/cpfp/{txid}`.

• get_difficulty_adjustment

  Get current difficulty adjustment progress and estimates. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-difficulty-adjustment)* REST operation: `GET /api/v1/difficulty-adjustment`.

• get_difficulty_adjustments

  Get historical difficulty adjustments including timestamp, block height, difficulty value, and percentage change. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-difficulty-adjustments)* REST operation: `GET /api/v1/mining/difficulty-adjustments`.

• get_difficulty_adjustments_by_period

  Get historical difficulty adjustments for a time period. Valid periods: `24h`, `3d`, `1w`, `1m`, `3m`, `6m`, `1y`, `2y`, `3y`. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-difficulty-adjustments)* REST operation: `GET /api/v1/mining/difficulty-adjustments/{time_period}`.

• get_fullrbf_replacements

  Same response shape as `GET /api/v1/replacements`, but limited to trees where at least one predecessor was non-signaling (full-RBF). *[Mempool.space docs](https://mempool.space/docs/api/rest#get-fullrbf-replacements)* REST operation: `GET /api/v1/fullrbf/replacements`.

• get_hashrate

  Get network hashrate and difficulty data for all time. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-hashrate)* REST operation: `GET /api/v1/mining/hashrate`.

• get_hashrate_by_period

  Get network hashrate and difficulty data for a time period. Valid periods: `24h`, `3d`, `1w`, `1m`, `3m`, `6m`, `1y`, `2y`, `3y`. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-hashrate)* REST operation: `GET /api/v1/mining/hashrate/{time_period}`.

• get_historical_price

  Get historical BTC/USD price. Optionally specify a UNIX timestamp to get the price at that time. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-historical-price)* REST operation: `GET /api/v1/historical-price`.

• get_indexes

  Returns all available indexes with their accepted query aliases. Use any alias when querying series. REST operation: `GET /api/series/indexes`.

• get_mempool

  Get current mempool statistics including transaction count, total vsize, total fees, and fee histogram. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-mempool)* REST operation: `GET /api/mempool`.

• get_mempool_blocks

  Projected blocks for fee estimation. Block 0 reflects Bitcoin Core's actual next-block selection; blocks 1+ are a fee-tier approximation. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-mempool-blocks-fees)* REST operation: `GET /api/v1/fees/mempool-blocks`.

• get_mempool_hash

  Returns an opaque hash that changes whenever the projected next block changes. Same value as the mempool ETag. Useful as a freshness/liveness signal: if it stays constant for tens of seconds on a live network, the mempool sync loop has stalled. REST operation: `GET /api/mempool/hash`.

• get_mempool_recent

  Get the last 10 transactions to enter the mempool. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-mempool-recent)* REST operation: `GET /api/mempool/recent`.

• get_oracle_histogram_outputs

  Unfiltered output value histogram for a confirmed point. A block height (`840000`) gives every output in that block, coinbase included, binned by value on the oracle log scale; a calendar date (`YYYY-MM-DD`) sums every block that day. A flat array of log-scale bins. REST operation: `GET /api/oracle/histogram/outputs/{point}`.

• get_oracle_histogram_outputs_live

  Live unfiltered output value histogram for the forming mempool block. Every live output is binned by value on the oracle log scale; no oracle payment filters are applied. A flat array of log-scale bins, all zero when no mempool is configured. REST operation: `GET /api/oracle/histogram/outputs/live`.

• get_oracle_histogram_payments

  Smoothed histogram of oracle-eligible payment outputs for a confirmed point. A block height (`840000`) gives that block's oracle payment histogram; a calendar date (`YYYY-MM-DD`) gives the average of that day's per-block payment histograms. A flat array of log-scale bins. REST operation: `GET /api/oracle/histogram/payments/{point}`.

• get_oracle_histogram_payments_live

  Live smoothed histogram of oracle-eligible payment outputs, binned by output value on the oracle log scale. It combines the committed oracle window with the forming mempool block. A flat array of log-scale bins. REST operation: `GET /api/oracle/histogram/payments/live`.

• get_pool

  Get detailed information about a specific mining pool including block counts and shares for different time periods. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-mining-pool)* REST operation: `GET /api/v1/mining/pool/{slug}`.

• get_pool_blocks

  Get the 10 most recent blocks mined by a specific pool. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-mining-pool-blocks)* REST operation: `GET /api/v1/mining/pool/{slug}/blocks`.

• get_pool_blocks_from

  Get 10 blocks mined by a specific pool before (and including) the given height. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-mining-pool-blocks)* REST operation: `GET /api/v1/mining/pool/{slug}/blocks/{height}`.

• get_pool_hashrate

  Get hashrate history for a specific mining pool. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-mining-pool-hashrate)* REST operation: `GET /api/v1/mining/pool/{slug}/hashrate`.

• get_pool_stats

  Get mining pool statistics for a time period. Valid periods: `24h`, `3d`, `1w`, `1m`, `3m`, `6m`, `1y`, `2y`, `3y`. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-mining-pools)* REST operation: `GET /api/v1/mining/pools/{time_period}`.

• get_pools

  Get list of all known mining pools with their identifiers. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-mining-pools)* REST operation: `GET /api/v1/mining/pools`.

• get_pools_hashrate

  Get hashrate data for all mining pools. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-mining-pool-hashrates)* REST operation: `GET /api/v1/mining/hashrate/pools`.

• get_pools_hashrate_by_period

  Get hashrate data for all mining pools for a time period. Valid periods: `1m`, `3m`, `6m`, `1y`, `2y`, `3y`. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-mining-pool-hashrates)* REST operation: `GET /api/v1/mining/hashrate/pools/{time_period}`.

• get_precise_fees

  Recommended fee rates by confirmation target, with up to three decimal places and support for sub-sat/vB rates. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-recommended-fees-precise)* REST operation: `GET /api/v1/fees/precise`.

• get_prices

  Returns bitcoin latest price (on-chain derived, USD only). *[Mempool.space docs](https://mempool.space/docs/api/rest#get-price)* REST operation: `GET /api/v1/prices`.

• get_replacements

  Returns up to 25 most-recent RBF replacement trees across the whole mempool. Each entry has the same shape as `tx_rbf().replacements`. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-replacements)* REST operation: `GET /api/v1/replacements`.

• get_reward_stats

  Get mining reward statistics for the last N blocks including total rewards, fees, and transaction count. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-reward-stats)* REST operation: `GET /api/v1/mining/reward-stats/{block_count}`.

• get_series

  Fetch data for a specific series at the given index. Use query parameters to filter by date range and format (json/csv). REST operation: `GET /api/series/{series}/{index}`.

• get_series_bulk

  Fetch multiple series in a single request. Supports filtering by index and date range. Returns an array of SeriesData objects. For a single series, use `get_series` instead. REST operation: `GET /api/series/bulk`.

• get_series_count

  Returns the number of series available per index type. REST operation: `GET /api/series/count`.

• get_series_info

  Returns the optional description, supported indexes, and value type for the specified series. REST operation: `GET /api/series/{series}`.

• get_series_latest

  Returns the single most recent value for a series, unwrapped (not inside a SeriesData object). REST operation: `GET /api/series/{series}/{index}/latest`.

• get_series_len

  Returns the total number of data points for a series at the given index. REST operation: `GET /api/series/{series}/{index}/len`.

• get_series_version

  Returns the current version of a series. Changes when the series data is updated. REST operation: `GET /api/series/{series}/{index}/version`.

• get_sync_status

  Returns the sync status of the indexer, including indexed height, tip height, blocks behind, and last indexed timestamp. REST operation: `GET /api/server/sync`.

• get_transaction_times

  Returns timestamps when transactions were first seen in the mempool. Returns 0 for mined or unknown transactions. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-transaction-times)* REST operation: `GET /api/v1/transaction-times`.

• get_tx

  Retrieve complete transaction data by transaction ID (txid). Returns inputs, outputs, fee, size, and confirmation status. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-transaction)* REST operation: `GET /api/tx/{txid}`.

• get_tx_by_index

  Retrieve the transaction ID (txid) at a given global transaction index. Returns the txid as plain text. REST operation: `GET /api/tx-index/{index}`.

• get_tx_hex

  Retrieve the raw transaction as a hex-encoded string. Returns the serialized transaction in hexadecimal format. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-transaction-hex)* REST operation: `GET /api/tx/{txid}/hex`.

• get_tx_merkle_proof

  Get the merkle inclusion proof for a transaction. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-transaction-merkle-proof)* REST operation: `GET /api/tx/{txid}/merkle-proof`.

• get_tx_merkleblock_proof

  Get the merkleblock proof for a transaction (BIP37 format, hex encoded). *[Mempool.space docs](https://mempool.space/docs/api/rest#get-transaction-merkleblock-proof)* REST operation: `GET /api/tx/{txid}/merkleblock-proof`.

• get_tx_outspend

  Get the spending status of a transaction output. Returns whether the output has been spent and, if so, the spending transaction details. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-transaction-outspend)* REST operation: `GET /api/tx/{txid}/outspend/{vout}`.

• get_tx_outspends

  Get the spending status of all outputs in a transaction. Returns an array with the spend status for each output. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-transaction-outspends)* REST operation: `GET /api/tx/{txid}/outspends`.

• get_tx_rbf

  Returns the RBF replacement tree for a transaction, if any. Both `replacements` and `replaces` are null when the tx has no known RBF history within the mempool monitor's retention window. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-transaction-rbf-history)* REST operation: `GET /api/v1/tx/{txid}/rbf`.

• get_tx_status

  Retrieve the confirmation status of a transaction. Returns whether the transaction is confirmed and, if so, the block height, hash, and timestamp. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-transaction-status)* REST operation: `GET /api/tx/{txid}/status`.

• get_urpd

  URPD for the most recent available date in the cohort. The response's `date` field echoes which date was served. Returns `{ cohort, date, weight, aggregation, close, total_supply, buckets }`. `close` and each bucket's `price_floor`, `realized_cap`, and `unrealized_pnl` are USD; `total_supply` and bucket `supply` are BTC. `unrealized_pnl` can be negative. REST operation: `GET /api/urpd/{cohort}`.

• get_urpd_at

  URPD for a (cohort, date) pair. Returns `{ cohort, date, weight, aggregation, close, total_supply, buckets }` where each bucket is `{ price_floor, supply, realized_cap, unrealized_pnl }`. `close`, `price_floor`, `realized_cap`, and `unrealized_pnl` are USD; `total_supply` and `supply` are BTC. `unrealized_pnl` can be negative. REST operation: `GET /api/urpd/{cohort}/{date}`.

• list_series

  Paginated flat list of all available series names. Use `page` query param for pagination. REST operation: `GET /api/series/list`.

• list_urpd_cohorts

  Cohorts for which URPD data is available. Returns names like `all`, `sth`, `lth`, `utxos_under_1h_old`. REST operation: `GET /api/urpd`.

• list_urpd_dates

  Dates for which a URPD snapshot is available for the cohort and selected `weight`. One entry per UTC day, sorted ascending. REST operation: `GET /api/urpd/{cohort}/dates`.

• search_series

  Search series by name or descriptive terms. Matches metric names, descriptions, formulas, cohort aliases, partial words, and common typos. REST operation: `GET /api/series/search`.

• validate_address

  Validate a Bitcoin address and get information about its type and scriptPubKey. Returns `isvalid: false` with an error message for invalid addresses. *[Mempool.space docs](https://mempool.space/docs/api/rest#get-address-validate)* REST operation: `GET /api/v1/validate-address/{address}`.