MCP For Claude Marketplace
Blockchair (Universal Blockchain Search Engine & API)

Blockchair (Universal Blockchain Search Engine & API) MCP Connector for Claude

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Query blocks, transactions, and addresses across multiple blockchains like Bitcoin and Ethereum using Blockchair's universal API.

11 tools Official Updated Jun 28, 2026 Official Vinkius Partner
More Details Connect to Claude

Connect to Blockchair, the most advanced universal blockchain search engine, and explore decentralized data across 20+ networks including Bitcoin, Ethereum, and Litecoin through natural conversation.

What you can do

  • Multi-Chain Stats — Get real-time network health, difficulty, and block height for any supported blockchain using get_blockchain_stats.
  • Deep Address Inspection — Retrieve balances, transaction history, and UTXO sets for specific wallet addresses with get_address.
  • SQL-like Filtering — Query blocks and transactions using advanced filters (e.g., filter by fee, time, or value) via filter_transactions and filter_blocks.
  • Token & Contract Data — Check ERC-20 token balances and inspect internal Ethereum contract calls using specialized tools.
  • HD Wallet Support — Analyze entire HD wallets using extended public keys (xpub) with the get_xpub tool.

How it works

  1. Subscribe to this server
  2. Enter your Blockchair API Key
  3. Start querying blockchain data directly from Claude, Cursor, or any MCP-compatible client

Who is this for?

  • Web3 Developers — Debug transactions and verify contract states without leaving your IDE or code editor.
  • Data Analysts — Extract specific blockchain datasets using powerful filtering tools for research or reporting.
  • Crypto Enthusiasts — Track wallet balances and monitor network congestion through simple natural language prompts.
bitcoinethereumblockchain-explorercrypto-apitransaction-tracking

11 tools expose this connector's capabilities to your AI agent.

filter_blocks

Example q: time(2023-01-01..2023-01-02),transaction_count(100..) Query blocks using SQL-like filters

filter_transactions

Example q: fee(10000..), s: fee(desc) Query transactions using SQL-like filters

get_address

Retrieve balance, history, and UTXO set for an address

get_block

Retrieve details about a specific block

get_contract_calls

Get Ethereum contract internal transactions

get_erc20_token_address

Get the balance of a specific ERC-20 token for an address

get_blockchain_stats

for the specified blockchain. Get general information about a blockchain

get_transaction

Retrieve details about a specific transaction

get_xpub

Retrieve data for an entire HD wallet (xpub)

push_transaction

Broadcast a raw hex-encoded transaction to the network

validate_address

Check if an address is valid for a specific chain

See how to talk to your AI agent using Blockchair (Universal Blockchain Search Engine & API).

Show me the current stats for the Bitcoin network.

I've retrieved the latest Bitcoin stats. The current block height is 834,291, with a difficulty of 79.35T. There have been over 980 million transactions recorded on the network to date.

What is the balance and transaction history for Ethereum address 0x742d35Cc6634C0532925a3b844Bc454e4438f44e?

The address currently holds 12.5 ETH. I found 45 transactions in its history. The most recent transaction was a transfer of 1.2 ETH on 2024-03-15. Would you like to see the details of the last 5 transactions?

Find Bitcoin transactions with a fee higher than 50,000 satoshis from the last 24 hours.

I've filtered the Bitcoin transactions. I found 12 transactions matching your criteria. The highest fee observed was 120,500 satoshis for transaction hash 4a5e... Would you like the full list of hashes?

Yes! You can specify the blockchain (e.g., 'bitcoin', 'ethereum', 'dogecoin') in tools like `get_blockchain_stats` or `get_address` to retrieve data from that specific network.

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