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Cryptocurrency & Blockchain

Tools for querying Bitcoin and multi-chain blockchain data — transactions, blocks, and wallet addresses. Useful for tracing fund flows, investigating ransomware payments, and sanctions research.

All tools are free with no API key required.

blockchain_rawtx

Fetch raw Bitcoin transaction data from Blockchain.info by transaction hash.

Parameter Type Required Default Description
tx_hash str Yes — Bitcoin transaction hash (txid).

Returns: JSON with inputs, outputs, value, fee, block height, and confirmation count.
Auth: None.

Usage examples

Fetch a Bitcoin transaction by hash: 

blockchain_rawtx(tx_hash="4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b")

blockchain_rawblock

Fetch raw Bitcoin block data from Blockchain.info by block hash or height.

Parameter Type Required Default Description
block_hash str Yes — Bitcoin block hash or block height number.

Returns: JSON with block header, transaction list, timestamp, difficulty, and miner info.
Auth: None.

Usage examples

Fetch the Bitcoin genesis block: 

blockchain_rawblock(block_hash="000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f")

Fetch a block by height: 

blockchain_rawblock(block_hash="700000")

blockchain_rawaddr

Fetch Bitcoin address summary and transaction history from Blockchain.info.

Parameter Type Required Default Description
bitcoin_address str Yes — Bitcoin address in base58 or bech32 format.

Returns: JSON with total received, total sent, current balance, and transaction history.
Auth: None.

Usage examples

Fetch transaction history for a Bitcoin address: 

blockchain_rawaddr(bitcoin_address="1A1zP1eP5QGefi2DMPTfTL5SLmv7Divf")

blockchair

Look up a transaction or address across 15+ blockchains via the Blockchair API. Automatically detects whether the query is a transaction (64-char hex) or address.

Parameter Type Required Default Description
chain str Yes — Blockchain to query. See supported chains below.
query str Yes — Transaction hash (64 hex chars) or wallet address.

Supported chains: bitcoin, ethereum, litecoin, bitcoin-cash, dogecoin, dash, zcash, bitcoin-sv, monero, ripple, stellar, cardano, polkadot, solana, tron.

Returns: JSON with transaction or address details for the specified chain.
Auth: None (1800 req/hour).

Usage examples

Look up an Ethereum wallet address: 

blockchair(chain="ethereum", query="0x742d35Cc6634C0532925a3b844Bc454e4438f44e")

Look up a Bitcoin address: 

blockchair(chain="bitcoin", query="1A1zP1eP5QGefi2DMPTfTL5SLmv7Divf")

Trace a Solana transaction: 

blockchair(chain="solana", query="5UfgJ5vVZxUxefDGqzqkVLHzHxVTyYH9StYyHKpbdXsT")