What can you do with Blockchain APIs?

  •   Bitcoin
    •   Bitcoin
    •   Ethereum
    •   Bitcoin Cash
    •   Litecoin
    •   Dash
    •   Monero
The returned object will contain recently created block height,
hash, and optimized fee information.
Code Samples:
  GET /v1/btc/block
  Host: api.blocksdk.com
  Content-Type: application/json
  X-API-Key: my-api-key
Response Body:
  {
   "height":613641,
   "bestblockhash":"0000000000000000000c25dc5578fa3de6977dc9597c65414c56d7227157a8e3",
   "prev_hash":"0000000000000000000c9f22305fd14cbe72b23b2d9c247b5edd80ae16517caa",
   "unconfirmed_count":2594,
   "low_fee_per_kb":0.00011,
   "medium_fee_per_kb":0.00018,
   "high_fee_per_kb":0.0002
  }
										 
									
The returned object contains information about the block
Code Samples:
  GET /v1/btc/block/613641
  Host: api.blocksdk.com
  Content-Type: application/json
  X-API-Key: my-api-key
Response Body:
  {
   "hash":"0000000000000000000c25dc5578fa3de6977dc9597c65414c56d7227157a8e3",
   "confirmations":4,
   "height":613641,
   "time":1579492627,
   "tx":[...],
   "tx_count":2625,
   "input_total":2740.85720379,
   "input_count":5096,
   "out_total":2740.80292946,
   "out_count":9266,
   "fee_per_kb":0.00004082,
   "fee_total":0.05427433,
   "generation":12.5,
   "reward":12.55427433,
   "size":1329761,
   "prev_hash":"0000000000000000000c9f22305fd14cbe72b23b2d9c247b5edd80ae16517caa",
   "next_hash":"0000000000000000000160ab173363853dff9267a7ceb55fa3b4f10ec6aeb242"
  }
The returned object contains information about the address
Code Samples:
  GET /v1/btc/address/34KoFPj1NAx6m4VPns5QzUg4xG6RkKsZv2
  Host: api.blocksdk.com
  Content-Type: application/json
  X-API-Key: my-api-key
Response Body:
  {
   "address":"34KoFPj1NAx6m4VPns5QzUg4xG6RkKsZv2",
   "tx":[...],
   "tx_count":9,
   "received_count":6,
   "received_total":6,
   "received_unconfirmed":0,
   "spent_count":3,
   "spent_total":3.6,
   "spent_unconfirmed":0,
   "balance":2.4,
   "unconfirmed_count":0,
   "first_time":1579348904,
   "last_time":1579496520
  }
The returned object contains information about the transaction
Code Samples:
  GET /v1/btc/transaction/92174acd21313f8744a89f83062dd0dc345b58e6fe70a4898135e5c4d3b1d970
  Host: api.blocksdk.com
  Content-Type: application/json
  X-API-Key: my-api-key
Response Body:
  {
   "txid":"92174acd21313f8744a89f83062dd0dc345b58e6fe70a4898135e5c4d3b1d970",
   "hash":"0b1a049b2210b4a861ca3a08b5cf42d0564cdc572a012cab2fdf0198c60d5d5c",
   "version":1,
   "size":380,
   "vin":[...],
   "total_in":4.10293973,
   "vout":[...],
   "total_out":4.10243973,
   "total_out":4.10243973,
   "in_count":1,
   "out_count":2,
   "fee":0.0005,
   "fee_per_kb":0.00131579,
   "locktime":0,
   "block_hash":"00000000000000000003c042040dd63c131707c3ee90a77d88d717064b4a36f6",
   "block_height":613447,
   "time":1579372205,
   "confirmations":199
  }

BLOCK SDK PRICING

Start at no charge and change to monthly usage.
  •   FREE
    •   FREE
    •   Small
    •   Basic
    •   Beta
    •   Pro
    •   Production
Free Small Basic Beta Pro Production
Days POST
Daily POST Method Count
3000 4000 9000 19000 40000 84000
Rate Limit
The number of requests you can make in 1 second
3/sec 5/sec 8/sec 11/sec 14/sec 17/sec
Webhook Count
The number of requests you can make in 1 second
300 1000 2000 5000 10000 22000
CallBack/Hour
Maximum number of webhook callback calls in 1 hour
150 400 800 1600 3200 7000
Exchange Rates
Currency exchange rate api is available
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Block
You can inquire information about cryptocurrency blocks.
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Address
Address general information, generate addresses, address transactions
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Wallet
HD Wallets, create wallet, get wallet, list wallets, add address from a wallet
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WebHook
You can subscribe for the following events: confirmed tx, tx pool and transaction confirmations. We send you a call back with more details once any of these events happen.
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Transactions
Transaction details, block transactions, unconfirmed transactions, create transaction, sign transaction, send singed transaction, new transaction, transaction fees
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Support
Please feel free to contact us if you have any questions.
Email Support Priority Email Priority Email 3h response time 2h response time 1h response time
Days POST
Daily POST Method Count
3000
Rate Limit
The number of requests you can make in 1 second
3/sec
Webhook Count
The number of requests you can make in 1 second

300

CallBack/Hour
Maximum number of webhook callback calls in 1 hour

150

Exchange Rates
Currency exchange rate api is available
check-icon
Block
You can inquire information about cryptocurrency blocks
check-icon
Address
Address general information, generate addresses, address transactions
check-icon
Wallet
HD Wallets, create wallet, get wallet, list wallets, add address from a wallet
check-icon
WebHook
You can subscribe for the following events: confirmed tx, tx pool and transaction confirmations. We send you a call back with more details once any of these events happen
check-icon
Transactions
Transaction details, block transactions, unconfirmed transactions, create transaction, sign transaction, send singed transaction, new transaction, transaction fees
check-icon
Support
Please feel free to contact us if you have any questions

Email Support

How Can We Help?

Office address : 59, Hongsannam-ro, Wansan-gu, Jeonju-si, Jeollabuk-do, Republic of Korea, 54969