Blockchains API Migration Path

🔄 Migration Path from v3 to v4 Blockchains API Endpoints

Block Data

Endpoints for retrieving blockchain block information.

• Get current block height – Retrieve the latest block height for a supported blockchain.
• Get block by hash or height – Retrieve detailed information about a specific block.
• Get block hash by block number – Retrieve the block hash using a block number.

Transactions

Endpoints for retrieving transaction-level data across supported blockchains.

• Get transaction by hash – Retrieve transaction details for EVM and UTXO blockchains.
• Get internal transactions by address – Retrieve internal transactions for an address on supported EVM chains.
• Get outgoing transaction count – Retrieve the number of outgoing transactions (+pending) for a given address.
• Get mempool transaction hashes – Retrieve hashes of pending transactions from the mempool.

Address & Balance Data

Endpoints for retrieving address-level blockchain data.

• Get native balance – Retrieve the native balance of an address across supported blockchains.
• Get native balance (batch) – Retrieve balances for multiple addresses in a single request.

UTXO Data

Endpoints specific to UTXO-based blockchains such as Bitcoin, Litecoin, Dogecoin, and Bitcoin Cash.

• Get UTXO info by tx hash and index – Retrieve details of a specific transaction output.
• Get transaction history (UTXO) – Retrieve transaction history for an address.
• Get transaction history (UTXO) batch – Retrieve transaction history for multiple addresses in a single request.

📝 Migration Checklist

1. Review breaking changes specific to your use cases
2. Update API endpoints from v3 to v4 format
3. Adjust response parsing for changed field names and/or behaviour.
4. Test with new unified endpoints across your supported chains
5. Update chain parameter handling from path-based to query/body-based
6. Plan migration timeline well before May 31, 2026

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Attention

We strongly encourage customers to review and compare each endpoint's behavior individually, regardless of whether breaking changes are involved.