mempool.space

Bitcoin fees, bitcoin address balances and bitcoin transactions

mempool.space provides Bitcoin mempool, transaction fee, block, price, and address activity data, including current fee estimates and up to 50 recent address transactions.

Get bitcoin address

See a Bitcoin address’s confirmed and pending balances, lifetime received and sent amounts, and up to 50 recent transactions. USD balance uses the latest reported Bitcoin price; received and sent totals include pending transactions.

Your information

Address

Bitcoin address starting with 1, 3 or bc1, for example 1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa.

Max TransactionsOptional

Maximum recent transactions to return, for example 10. Defaults to 10; maximum 50.

1 credit per run

Example results

Address: 1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa
Total Sent Btc: 0
Transaction Count: 66,619
Total Received Btc: 57.47644956
Confirmed Balance Btc: 57.47633581
Confirmed Balance (USD): 4,779,042.37
Unconfirmed Balance Btc: 0.00011375
Recent Transactions: Recent Transactions
Link Fee Btc Confirmed Date Time Block Height Net Change Btc Transaction ID
mempool.space
0.0000002
no
—
—
0.00003672
c99e446ab2d43e999de5708e62a8384f187f8015cc6d188af2a23e8d313b39a4
mempool.space
0.00000043
no
—
—
0.00000546
4fe8b2b6fec09c158e1bd622e236a629510c87d4f77a9778f416a850aab041db
mempool.space
0.00000055
no
—
—
0.00000546
5b38b8e6c131189d1366d8b73241a6034ccd637edd4d5ad1c7195dfb92d9e847
mempool.space
0.00000073
no
—
—
0.00000546
72e3157ffd71047b4b3ad53c7e5569deebdb3a9311299bbe0e9716dcc96183ad
mempool.space
0.00000019
no
—
—
0.00000605
23a7da969d343379593be3f571a8be0043c818fc686cb8b708bdfc28c9a6e7f5
mempool.space
0.00000047
no
—
—
0.00000546
8c23b2cb60bc1887aaaa0582062289d360944ecba1d450cf05af9ed0c3b794f6
mempool.space
0.00000034
no
—
—
0.00000546
eafaab3f6fb4f8d9371545c8eb7234550134f7b3aea4bf2eb70bd1c789835f30
mempool.space
0.00000047
no
—
—
0.00000546
21d648babbf509e35321170ea32c6446b0308a8b1ac8d4db7271edef1602b588
mempool.space
0.00000045
no
—
—
0.00000546
171b275653dfe0250c155a4312a5ca2062abab282679e5acc18facbc41f18659
mempool.space
0.00000047
no
—
—
0.00000546
01211d3df9e15adbad674d59f816c63b2bd6d54316a00541cefdd74c1a013a8b

Recent Transactions
Link	Fee Btc	Confirmed	Date Time	Block Height	Net Change Btc	Transaction ID
mempool.space	0.0000002	no	—	—	0.00003672	c99e446ab2d43e999de5708e62a8384f187f8015cc6d188af2a23e8d313b39a4
mempool.space	0.00000043	no	—	—	0.00000546	4fe8b2b6fec09c158e1bd622e236a629510c87d4f77a9778f416a850aab041db
mempool.space	0.00000055	no	—	—	0.00000546	5b38b8e6c131189d1366d8b73241a6034ccd637edd4d5ad1c7195dfb92d9e847
mempool.space	0.00000073	no	—	—	0.00000546	72e3157ffd71047b4b3ad53c7e5569deebdb3a9311299bbe0e9716dcc96183ad
mempool.space	0.00000019	no	—	—	0.00000605	23a7da969d343379593be3f571a8be0043c818fc686cb8b708bdfc28c9a6e7f5
mempool.space	0.00000047	no	—	—	0.00000546	8c23b2cb60bc1887aaaa0582062289d360944ecba1d450cf05af9ed0c3b794f6
mempool.space	0.00000034	no	—	—	0.00000546	eafaab3f6fb4f8d9371545c8eb7234550134f7b3aea4bf2eb70bd1c789835f30
mempool.space	0.00000047	no	—	—	0.00000546	21d648babbf509e35321170ea32c6446b0308a8b1ac8d4db7271edef1602b588
mempool.space	0.00000045	no	—	—	0.00000546	171b275653dfe0250c155a4312a5ca2062abab282679e5acc18facbc41f18659
mempool.space	0.00000047	no	—	—	0.00000546	01211d3df9e15adbad674d59f816c63b2bd6d54316a00541cefdd74c1a013a8b

Example data · Run in Studio for fresh results.

About mempool.space

mempool.space, also called Mempool, returns Bitcoin fee recommendations, estimated costs, and the Bitcoin price; it needs no input.

Get bitcoin address returns address balances and recent transactions; it needs a Bitcoin address and optionally a transaction count.

Built by Fous from mempool.space and checked automatically; it last passed a check on Sep 29, 2026. Fous is not affiliated with mempool.space.

Actions

Get bitcoin address

1 credit per run

What you provide

Field	Type	Required	Description
Address`address`	Text	Required	Bitcoin address starting with 1, 3 or bc1, for example 1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa.Example: 1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa
Max Transactions`max_transactions`	Number	Optional	Maximum recent transactions to return, for example 10. Defaults to 10; maximum 50.Example: 10

What you get

Field	Type	Description
Address`address`	Text	Example: 1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa
Total Sent Btc`total_sent_btc`	Number	Example: 0
Transaction Count`transaction_count`	Number	Example: 66619
Total Received Btc`total_received_btc`	Number	Example: 57.47644956
Recent Transactions`recent_transactions`	List
Link`recent_transactions[].link`	Text	Transaction page on mempool.space.Example: https://mempool.space/tx/c99e446ab2d43e999de5708e62a8384f187f8015cc6d188af2a23e…
Fee Btc`recent_transactions[].fee_btc`	Number	Whole transaction network fee in BTC, not necessarily paid by this address.Example: 2e-7
Confirmed`recent_transactions[].confirmed`	Text	Whether this transaction is confirmed.Example: no
Date Time`recent_transactions[].date_time`	Date	Confirmation date and time in UTC, or null when unconfirmed.
Block Height`recent_transactions[].block_height`	Number	Block height, or null when unconfirmed.
Net Change Btc`recent_transactions[].net_change_btc`	Number	Change in this address’s balance in BTC, negative for a net send.Example: 0.00003672
Transaction ID`recent_transactions[].transaction_id`	Text	Transaction ID.Example: c99e446ab2d43e999de5708e62a8384f187f8015cc6d188af2a23e8d313b39a4
Confirmed Balance Btc`confirmed_balance_btc`	Number	Example: 57.47633581
Confirmed Balance (USD)`confirmed_balance_usd`	Number	Example: 4779042.37
Unconfirmed Balance Btc`unconfirmed_balance_btc`	Number	Example: 0.00011375

Example result

For Address: 1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa, Max Transactions: 10

JSON

{
  "address": "1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa",
  "total_sent_btc": 0,
  "transaction_count": 66619,
  "total_received_btc": 57.47644956,
  "recent_transactions": [
    {
      "link": "https://mempool.space/tx/c99e446ab2d43e999de5708e62a8384f187f8015cc6d188af2a23e8d313b39a4",
      "fee_btc": 2e-7,
      "confirmed": "no",
      "date_time": null,
      "block_height": null,
      "net_change_btc": 0.00003672,
      "transaction_id": "c99e446ab2d43e999de5708e62a8384f187f8015cc6d188af2a23e8d313b39a4"
    },
    {
      "link": "https://mempool.space/tx/4fe8b2b6fec09c158e1bd622e236a629510c87d4f77a9778f416a850aab041db",
      "fee_btc": 4.3e-7,
      "confirmed": "no",
      "date_time": null,
      "block_height": null,
      "net_change_btc": 0.00000546,
      "transaction_id": "4fe8b2b6fec09c158e1bd622e236a629510c87d4f77a9778f416a850aab041db"
    },
    {
      "link": "https://mempool.space/tx/5b38b8e6c131189d1366d8b73241a6034ccd637edd4d5ad1c7195dfb92d9e847",
      "fee_btc": 5.5e-7,
      "confirmed": "no",
      "date_time": null,
      "block_height": null,
      "net_change_btc": 0.00000546,
      "transaction_id": "5b38b8e6c131189d1366d8b73241a6034ccd637edd4d5ad1c7195dfb92d9e847"
    }
  ],
  "confirmed_balance_btc": 57.47633581,
  "confirmed_balance_usd": 4779042.37,
  "unconfirmed_balance_btc": 0.00011375
}

Get bitcoin fees

1 credit per run

Get current Bitcoin fee-rate recommendations, estimated USD costs for a 140-vbyte transaction, and the Bitcoin price in USD. Confirmation times are estimates, not guarantees.

What you provide

Nothing. This action is ready to run.

What you get

Field	Type	Description
Reading Time`reading_time`	Date	Time these readings were fetched, in UTC.Example: 2026-09-29T04:48:00Z
Currency Code`currency_code`	Text	Currency of estimated costs and Bitcoin price (USD).Example: USD
Economy Cost (USD)`economy_cost_usd`	Number	Estimated USD fee for a 140-vbyte transaction at the economy rate.Example: 0.1164184
Minimum Cost (USD)`minimum_cost_usd`	Number	Estimated USD fee for a 140-vbyte transaction at the minimum rate.Example: 0.1164184
Bitcoin Price (USD)`bitcoin_price_usd`	Number	Price of one bitcoin in US dollars.Example: 83156
One Hour Cost (USD)`one_hour_cost_usd`	Number	Estimated USD fee for a 140-vbyte transaction at the about 1 hour rate.Example: 0.1164184
Next Block Cost (USD)`next_block_cost_usd`	Number	Estimated USD fee for a 140-vbyte transaction at the next block (fastest) rate.Example: 0.4656736
Thirty Minutes Cost (USD)`thirty_minutes_cost_usd`	Number	Estimated USD fee for a 140-vbyte transaction at the about 30 minutes rate.Example: 0.4656736
Economy Fee Sat Per Vbyte`economy_fee_sat_per_vbyte`	Number	Economy recommended transaction fee rate in satoshis per virtual byte.Example: 1
Minimum Fee Sat Per Vbyte`minimum_fee_sat_per_vbyte`	Number	Minimum recommended transaction fee rate in satoshis per virtual byte.Example: 1
One Hour Fee Sat Per Vbyte`one_hour_fee_sat_per_vbyte`	Number	About 1 hour recommended transaction fee rate in satoshis per virtual byte.Example: 1
Next Block Fee Sat Per Vbyte`next_block_fee_sat_per_vbyte`	Number	Next block (fastest) recommended transaction fee rate in satoshis per virtual byte.Example: 4
Thirty Minutes Fee Sat Per Vbyte`thirty_minutes_fee_sat_per_vbyte`	Number	About 30 minutes recommended transaction fee rate in satoshis per virtual byte.Example: 4

Example result

For

JSON

{
  "reading_time": "2026-09-29T04:48:00Z",
  "currency_code": "USD",
  "economy_cost_usd": 0.1164184,
  "minimum_cost_usd": 0.1164184,
  "bitcoin_price_usd": 83156,
  "one_hour_cost_usd": 0.1164184,
  "next_block_cost_usd": 0.4656736,
  "thirty_minutes_cost_usd": 0.4656736,
  "economy_fee_sat_per_vbyte": 1,
  "minimum_fee_sat_per_vbyte": 1,
  "one_hour_fee_sat_per_vbyte": 1,
  "next_block_fee_sat_per_vbyte": 4,
  "thirty_minutes_fee_sat_per_vbyte": 4
}

For developers

Run this workflow from your own code. In Studio, turn on Developer mode and create an API key.

cURL

# First set your key: export FOUS_API_KEY='YOUR_FOUS_API_KEY'
: "${FOUS_API_KEY:?Set FOUS_API_KEY before running this example}"

curl 'https://api.fous.com/v1/query' \
  --fail-with-body --silent --show-error --max-time 120 \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H 'Content-Type: application/json' \
  --data-raw '{
  "api": "@mempool-space",
  "visibility": "public",
  "operation": "get_bitcoin_address",
  "version": 1,
  "input": {
    "address": "1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa",
    "max_transactions": 10
  },
  "response": {
    "format": "json"
  }
}'

What you can do with it

Compare estimated Bitcoin transaction costs across confirmation speeds.
Track confirmed and pending balances for a Bitcoin address.
Review recent transactions and balance changes for an address.
Monitor lifetime Bitcoin received and sent by an address.

Questions

Is Fous affiliated with mempool.space?

No. Fous is not affiliated with mempool.space. This workflow reads the public mempool.space website and returns its data.

How much does it cost?

Each run costs 1 credit. With pay-as-you-go, a credit costs 1¢; monthly plans cost less per credit.

Do I need a mempool.space account?

No. You only need a Fous account.

How current is the data?

Fous gets the data from mempool.space when you run it; repeating the same request within a day may return the saved result. Fous checks this workflow automatically; it last passed a check on Sep 29, 2026.