> For the complete documentation index, see [llms.txt](https://docs.taal.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.taal.com/core-products/whatsonchain/change-log.md).

# Change Log

These are the most recent changes and additions to the API:

* 07/21/2025
  * Removing deprecated endpoints:
    * (Un)Spent Transaction Outputs - Get UTXOs by Address
    * (Un)Spent Transaction Outputs - Bulk UTXOs by Address
    * (Un)Spent Transaction Outputs - Get UTXOs by Script
    * (Un)Spent Transaction Outputs - Bulk UTXOs by Script
    * Address - Get Balance
    * Address - Bulk Balance
    * Address - Get History
    * Script - Get Script History
* 07/14/2025
  * Adding basic BTC support to existing endpoint groups:
    * [Health](/core-products/whatsonchain/health.md)
    * [Chain Info](/core-products/whatsonchain/chain-info.md)
    * [Block](/core-products/whatsonchain/block.md)
    * [Transaction](/core-products/whatsonchain/transaction.md)
    * [Mempool](/core-products/whatsonchain/mempool.md)
    * [(Un)Spent Transaction Outputs](/core-products/whatsonchain/un-spent-transaction-outputs.md)
    * [Address](/core-products/whatsonchain/address.md)
    * [Script](/core-products/whatsonchain/script.md)
    * [Exchange Rate](/core-products/whatsonchain/exchange-rate.md)
    * [Search](/core-products/whatsonchain/search.md)
    * [Stats](/core-products/whatsonchain/stats.md)
  * Removing
    * Transaction - Download Receipt
* 04/25/2025
  * New
    * WebSockets - [WoC Sockets V2](/core-products/whatsonchain/websockets/woc-sockets-v2-beta.md)
  * Changes
    * Deprecated WebSockets - [WoC Sockets V1](/core-products/whatsonchain/websockets/woc-sockets-v1-deprecated.md)
    * Removed the Confirmed Transactions endpoint in WoC Sockets V1
* 12/31/2024
  * Changes
    * Transaction - [Get Merkle Proof](/core-products/whatsonchain/transaction.md#get-merkle-proof)
* 12/02/2024
  * New
    * Tokens - [1Sat Ordinals (Beta)](/core-products/whatsonchain/tokens/1sat-ordinals-beta.md)
* 10/22/2024
  * New
    * Transaction - [Get a Transaction as Binary](/core-products/whatsonchain/transaction.md#get-a-transaction-as-binary)
* 09/09/2024
  * Changes
    * (Un)Spent Transaction Outputs - [Get Confirmed UTXOs by Address](/core-products/whatsonchain/un-spent-transaction-outputs.md#get-confirmed-utxos-by-address-beta)
    * (Un)Spent Transaction Outputs - [Get Confirmed UTXOs by Script](/core-products/whatsonchain/un-spent-transaction-outputs.md#get-confirmed-utxos-by-script-beta)
* 10/05/2024
  * Changes
    * Block - [Get Header by Hash or Height](/core-products/whatsonchain/block.md#get-header-by-hash-or-height)
* 19/03/2024
  * New
    * Address - [Get Associated Scripthashes](/core-products/whatsonchain/address.md#get-associated-scripthashes)
    * Address - [Bulk History (Beta)](/core-products/whatsonchain/address.md#bulk-history-beta)
* 21/11/2023
  * New
    * (Un)Spent Transaction Outputs - [Bulk Spent Transaction Outputs (Beta)](/core-products/whatsonchain/un-spent-transaction-outputs.md#bulk-spent-transaction-outputs-beta)
* 15/11/2023
  * New
    * (Un)Spent Transaction Outputs - [Bulk Unconfirmed UTXOs by Address (Beta)](/core-products/whatsonchain/un-spent-transaction-outputs.md#bulk-unconfirmed-utxos-by-address-beta)
    * (Un)Spent Transaction Outputs - [Bulk Confirmed UTXOs by Address (Beta)](/core-products/whatsonchain/un-spent-transaction-outputs.md#bulk-confirmed-utxos-by-address-beta)
    * (Un)Spent Transaction Outputs - [Bulk Unconfirmed UTXOs by Script (Beta)](/core-products/whatsonchain/un-spent-transaction-outputs.md#bulk-unconfirmed-utxos-by-script-beta)
    * (Un)Spent Transaction Outputs - [Bulk Confirmed UTXOs by Script (Beta)](/core-products/whatsonchain/un-spent-transaction-outputs.md#bulk-confirmed-utxos-by-script-beta)
    * Address - [Bulk Unconfirmed Balance (Beta)](/core-products/whatsonchain/address.md#bulk-unconfirmed-balance-beta)
    * Address - [Bulk Confirmed Balance (Beta)](/core-products/whatsonchain/address.md#bulk-confirmed-balance-beta)
    * Address - [Bulk Unconfirmed History (Beta)](/core-products/whatsonchain/address.md#bulk-unconfirmed-history-beta)
    * Address - [Bulk Confirmed History (Beta)](/core-products/whatsonchain/address.md#bulk-confirmed-history-beta)
    * Script - [Bulk Unconfirmed Script History (Beta)](/core-products/whatsonchain/script.md#bulk-unconfirmed-script-history-beta)
    * Script - [Bulk Confirmed Script History (Beta)](/core-products/whatsonchain/script.md#bulk-confirmed-script-history-beta)
* 26/10/2023
  * New
    * (Un)Spent Transaction Outputs - [Get Confirmed UTXOs by Address (Beta)](/core-products/whatsonchain/un-spent-transaction-outputs.md#get-confirmed-utxos-by-address-beta)
    * (Un)Spent Transaction Outputs - [Get Confirmed UTXOs by Script (Beta)](/core-products/whatsonchain/un-spent-transaction-outputs.md#get-confirmed-utxos-by-script-beta)
    * (Un)Spent Transaction Outputs - [Get Unconfirmed Spent Tx Output (Beta)](/core-products/whatsonchain/un-spent-transaction-outputs.md#get-unconfirmed-spent-tx-output-beta)
    * (Un)Spent Transaction Outputs - [Get Confirmed Spent Tx Output (Beta)](/core-products/whatsonchain/un-spent-transaction-outputs.md#get-confirmed-spent-tx-output-beta)
    * (Un)Spent Transaction Outputs - [Get Spent Transaction Output (Beta)](/core-products/whatsonchain/un-spent-transaction-outputs.md#get-spent-transaction-output-beta)
    * Address - [Get Confirmed Balance (Beta)](/core-products/whatsonchain/address.md#get-confirmed-balance-beta)
    * Address - [Get Confirmed History (Beta)](/core-products/whatsonchain/address.md#get-confirmed-history-beta)
    * Script - [Get Confirmed Script History (Beta)](/core-products/whatsonchain/script.md#get-confirmed-script-history-beta)
* 28/07/2023
  * New
    * Address - [Get Address Usage Status](/core-products/whatsonchain/address.md#get-address-usage-status)
    * Script - [Get Script Usage Status](/core-products/whatsonchain/script.md#get-script-usage-status)
* 07/07/2023
  * New
    * Address - [Get Mempool Balance](/core-products/whatsonchain/address.md#get-mempool-balance-beta)
    * Address - [Get Mempool History](/core-products/whatsonchain/address.md#get-mempool-history-beta)
    * Address - [Get Unspent Mempool Transactions](/core-products/whatsonchain/address.md#get-unspent-mempool-transactions-beta)
    * Script - [Get Mempool History](/core-products/whatsonchain/script.md#get-mempool-script-history-beta)
    * Script - [Get Script Mempool Unspent Transactions](/core-products/whatsonchain/script.md#get-script-mempool-unspent-transactions-beta)
* 03/05/2023
  * New
    * On-Chain Data - [Get OP\_RETURN Data by Tx Hash](/core-products/whatsonchain/on-chain-data.md#get-op_return-data-by-tx-hash)
* 20/04/2023
  * New
    * Transaction - [Get Transaction Propagation Status](/core-products/whatsonchain/transaction.md#get-transaction-propagation-status)
* 16/03/2023
  * New
    * [Output Tags](/core-products/whatsonchain/output-tags.md) (documentation only)
* 21/02/2023
  * New
    * Block - [Get Header Byte File Links](/core-products/whatsonchain/block.md#get-header-bytes-file-links)
    * Block - [Get Latest Header Bytes](/core-products/whatsonchain/block.md#get-latest-header-bytes)
* 20/10/2022
  * New
    * Stats - [Get tag count by height](/core-products/whatsonchain/stats.md#get-tag-count-by-height)
* 18/10/2022
  * New
    * Stats - [Get miner block stats](/core-products/whatsonchain/stats.md#get-miner-block-stats)
    * Stats - [Get miner summary stats](/core-products/whatsonchain/stats.md#get-miner-summary-stats)
* 13/10/2022
  * New
    * Stats - [Get block stats by height](/core-products/whatsonchain/stats.md#get-block-stats-by-height)
    * Stats - [Get block stats by hash](/core-products/whatsonchain/stats.md#get-block-stats-by-hash)
* 10/10/2022
  * New
    * Chain info - [Get peer info](/core-products/whatsonchain/chain-info.md#get-blockchain-info-1)
    * Exchange rate - [Get historical exchange rate](/core-products/whatsonchain/exchange-rate.md#get-historical-exchange-rate)
* 19/07/2022
  * New
    * [WoC Plugins](/core-products/whatsonchain/woc-plugins.md)
* 11/05/2022
  * New
    * [STAS Token endpoints](broken://pages/lPGx1nDc1m6ZtKyZmaec)
    * WebSockets - Options to filter [Mempool transactions](/core-products/whatsonchain/websockets.md#mempool-transactions) by the output type.
    * WebSockets - Options to filter [Confirmed transactions](/core-products/whatsonchain/websockets.md#confirmed-transactions) by the output type.
    * [WoC Widgets](/core-products/whatsonchain/woc-widgets.md)
* 02/03/2022
  * New
    * WebSockets - [Block transactions](/core-products/whatsonchain/websockets.md#block-transactions)
* 10/01/2022
  * New
    * [Get chain tips](/core-products/whatsonchain/chain-info.md#get-chain-tips)
    * [Get block header by hash with block-headers-client response format](/core-products/whatsonchain/block.md#get-header-by-hash)
* 03/08/2021
  * New
    * [Bulk transactions status](/core-products/whatsonchain/transaction.md#bulk-transaction-status)
    * [Bulk transactions raw data](/core-products/whatsonchain/transaction.md#bulk-raw-transaction-data)
* 17/06/2021
  * New
    * WebSockets - Adding testnet support
* 14/06/2021
  * New
    * WebSockets - [Chain Stats](/core-products/whatsonchain/websockets.md#chain-stats)
    * WebSockets - Extending support for non-centrifuge [clients](/core-products/whatsonchain/websockets.md)
* 22/03/2021
  * New
    * WebSockets - [Mempool transactions](/core-products/whatsonchain/websockets.md#mempool-transactions)
    * WebSockets - [Confirmed transactions](/core-products/whatsonchain/websockets.md#confirmed-transactions)
    * WebSockets - [Customized events](/core-products/whatsonchain/websockets.md#customized-events)
* 02/03/2021
  * Changes
    * Deprecating WoC Merchant API. Recommended to switch to [TAAL Merchant API](broken://pages/SeU2SvmzgfcvVyV4F2HE).
    * Deprecating WoC Bulk Broadcast. Recommended to switch to [TAAL Merchant AP](broken://pages/SeU2SvmzgfcvVyV4F2HE)I.
  * New
    * Adding [TAAL Merchant API](broken://pages/SeU2SvmzgfcvVyV4F2HE) details
    * WebSockets - [New block header event](/core-products/whatsonchain/websockets.md#new-block-header-event)
    * WebSockets - [Block headers history](/core-products/whatsonchain/websockets.md#block-headers-history)
* 26/11/2020
  * New
    * [Bulk script unspent transactions](/core-products/whatsonchain/script.md#bulk-script-unspent-transactions)
    * [Bulk address unspent transactions](/core-products/whatsonchain/address.md#bulk-unspent-transactions)
    * [Bulk address balance](/core-products/whatsonchain/address.md#bulk-balance)
* 13/07/2020
  * New
    * [Get block header by hash](/core-products/whatsonchain/block.md#get-header-by-hash)
    * [Get last 10 block headers](/core-products/whatsonchain/block.md#get-headers)
* 25/05/2020
  * New
    * Merchant API - [Get Fee Quotes](broken://pages/SeU2SvmzgfcvVyV4F2HE#get-fee-quote) from multiple transaction processors
    * Merchant API - [Submit tx](broken://pages/SeU2SvmzgfcvVyV4F2HE#submit-transaction) to a transaction processor
    * Merchant API - [Request Transaction status](broken://pages/SeU2SvmzgfcvVyV4F2HE#query-transaction-status) from a transaction processor
* 08/03/2020
  * New
    * Enabled [Get raw transaction data (hex)](/core-products/whatsonchain/transaction.md#get-raw-transaction-data) for testnet
    * Enabled [Get raw transaction output data by index (hex)](/core-products/whatsonchain/transaction.md#get-raw-transaction-output-data) for testnet
    * [Get script history](/core-products/whatsonchain/script.md#get-script-history)
    * [Get script unspent transactions](/core-products/whatsonchain/script.md#get-script-unspent-transactions)
    * [Get exchange rate](/core-products/whatsonchain/exchange-rate.md#get-exchange-rate)
* 03/02/2020
  * Changes
    * Removing support of STN network from address balance, history and UTXOs endpoints
    * Removing hex field from response body of [Get transaction by hash](/core-products/whatsonchain/transaction.md#get-by-tx-hash) request
    * Limiting vout\[x].scriptPubKey.asm and vout\[x].scriptPubKey.hex size to return max 100KB in response body of [Get transaction by hash](/core-products/whatsonchain/transaction.md#get-by-tx-hash)
    * Adding vout\[x].scriptPubKey.isTruncated flag, if data size is more than 100KB in vout\[x].scriptPubKey.hex
    * Removing old merkle proof endpoint \*/tx/{txid}/merkleproof
  * New
    * [Get raw transaction data](/core-products/whatsonchain/transaction.md#get-raw-transaction-data) 
    * [Get raw transaction output data by index (hex)](/core-products/whatsonchain/transaction.md#get-raw-transaction-output-data)
    * [Get Merkle Proof for transaction (Beta)](/core-products/whatsonchain/transaction.md#get-merkle-proof)
* 18/01/2020
  * New
    * [Bulk transaction details](/core-products/whatsonchain/transaction.md#bulk-transaction-details)
    * [Get circulating supply](/core-products/whatsonchain/chain-info.md#get-circulating-supply)
    * [Community Libraries](/core-products/whatsonchain/community-libraries.md)
* 18/11/2019
  * New
    * Bulk Broadcast transactions
* 09/11/2019
  * New
    * [Get merkle proof](/core-products/whatsonchain/transaction.md#get-merkle-proof)
* 21/10/2019
  * New
    * [Decode raw transaction](/core-products/whatsonchain/transaction.md#decode-transaction)
* 23/06/2019
  * New
    * [Download address statement](/core-products/whatsonchain/address.md#download-statement)
    * [Download transaction receipt](/core-products/whatsonchain/transaction.md#download-receipt)
  * Fixed
    * [Broadcast transaction](/core-products/whatsonchain/transaction.md#broadcast-transaction) endpoint now returns txid on success or error msg from node on failure
* 19/05/2019
  * New
    * [Get address balance](/core-products/whatsonchain/address.md#get-balance)
    * [Get address history](/core-products/whatsonchain/address.md#get-history)
    * [Get address UTXOs](/core-products/whatsonchain/address.md#get-unspent-transactions)
    * [Get explorer links](/core-products/whatsonchain/search.md#get-explorer-links)
* 22/04/2019
  * New
    * [Get chain info](/core-products/whatsonchain/chain-info.md#get-blockchain-info)
    * [Get mempool info](/core-products/whatsonchain/mempool.md#get-mempool-info)
    * [Get mempool transactions](/core-products/whatsonchain/mempool.md#get-mempool-transactions)
    * [Get address info](/core-products/whatsonchain/address.md#get-address-info)
* 15/04/2019
  * New
    * Get Health
    * [Get block by hash](/core-products/whatsonchain/block.md#get-by-hash)
    * [Get block by height](/core-products/whatsonchain/block.md#get-by-height)
    * [Get block pages](/core-products/whatsonchain/block.md#get-block-pages)
    * [Get transactions by hash](/core-products/whatsonchain/transaction.md#get-by-tx-hash)
    * [Broadcast transactions](/core-products/whatsonchain/transaction.md#broadcast-transaction)