How to Use the Blockchair (Universal Blockchain Search Engine & API) MCP in Claude

Q: How do I install this Blockchair (Universal Blockchain Search Engine & API) MCP Server on Claude Desktop?

Open your claudedesktopconfig.json file and add the Blockchair server configuration under the mcpServers key. Once you save the file and restart Claude Desktop, the tools will be ready to use in your chat input.

Q: Can I use Blockchair (Universal Blockchain Search Engine & API) to broadcast raw transactions via Claude Desktop?

Yes, you can use the pushtransaction tool to broadcast raw hex-encoded transactions directly from your chat. Simply paste the hex string and ask your agent to send it to the network.

Q: Does this Blockchair (Universal Blockchain Search Engine & API) MCP in Claude Desktop support HD wallets?

Yes, the getxpub tool allows you to retrieve data for an entire HD wallet structure using its xpub string. Claude Desktop parses the response to show you the aggregated balances and histories.

Q: How do I verify if a crypto address is valid before sending funds?

You use the validateaddress tool to check if an address format is correct for a specific blockchain. Your agent runs the check instantly, preventing you from sending assets to an invalid destination.

Inspect blocks, track wallets, and broadcast transactions directly inside Claude Desktop without leaving your chat window.

See Vinkius in Action

Works with every AI agent you already use

…and any MCP-compatible client

MCP Servers - Free for Subscribers

Connect Blockchair (Universal Blockchain Search Engine & API) MCP to Claude Desktop

Create your Vinkius account to connect Blockchair (Universal Blockchain Search Engine & API) to Claude Desktop and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

GDPR Free for Subscribers

Setup Blockchair (Universal Blockchain Search Engine & API) with Claude Desktop

Ask AI about this MCP

ChatGPT

Claude

Perplexity

Direct Blockchain Queries in Claude Desktop

The `get_address` tool brings live wallet balances, transaction histories, and UTXO sets straight to your Claude Desktop interface using this MCP server. You don't have to bounce between external block explorers to check if a Bitcoin payment cleared or to verify an Ethereum wallet's current state inside your chat. Ask your Claude Desktop agent to pull details with `get_transaction` or verify an address format using `validate_address`. It parses the raw Blockchair data and presents the blockchain analytics in your chat window, saving you from constant context switching.

SQL-Style Block and Transaction Filtering

The `filter_transactions` tool lets you search through millions of on-chain operations inside Claude Desktop using specific parameters like fee ranges or block heights. Instead of writing custom search scripts, you describe what you need to your Claude Desktop agent to locate specific transaction data. Combine this with `filter_blocks` to isolate blocks that match your exact criteria, like transaction count or timestamp ranges, directly in your Claude chat. Your AI client handles the API syntax, executes the Blockchair search, and hands you the filtered dataset from this MCP connector.

Deep Ethereum Contract and Token Analysis

The `get_contract_calls` tool fetches internal transactions for Ethereum smart contracts directly inside your Claude Desktop workspace. You can trace complex contract executions without relying on heavy web-based block explorers while chatting with Claude. Pair this with `get_erc20_token_address` to inspect specific token balances for any address on the network within your Claude Desktop session. Your agent extracts the exact Blockchair numbers, helping you audit token distributions or verify contract interactions in seconds.

Setup guide

Set up Blockchair (Universal Blockchain Search Engine & API) MCP in Claude Web or Desktop

1

Open Claude Settings

Go to claude.ai, click your profile icon, then navigate to Customize → Connectors.
2

Add Custom Connector

Click the "+" button and select Add custom connector. Paste your Vinkius endpoint URL: https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. For OAuth-protected servers, expand Advanced settings to add credentials.
3

Start a conversation

Open a new chat. The Blockchair (Universal Blockchain Search Engine & API) MCP tools are available immediately — no restart needed.

Endpoint URL

https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

No configuration file needed — paste the URL directly in the Claude web interface.

Available on Free (1 connector), Pro, Max, Team, and Enterprise plans.

Prerequisites

Claude Desktop installed (macOS or Windows)
Active Vinkius subscription with a valid endpoint token

1

Open Claude Desktop Settings

Click the menu icon at the top-left corner, go to Settings → Developer → Edit Config. This opens claude_desktop_config.json in your default text editor.
2

Paste the Blockchair (Universal Blockchain Search Engine & API) MCP configuration

Copy the JSON snippet on the right into the mcpServers object. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Restart Claude Desktop

Close and reopen the application. Claude needs a full restart to load new MCPs — refreshing a conversation is not enough.
4

Verify the connection

Open a new conversation. Click the 🔌 icon at the bottom of the message input. You should see tools listed under blockchair-universal-blockchain-search-engine-api-mcp.

json

{
  "mcpServers": {
    "blockchair-universal-blockchain-search-engine-api-mcp": {
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

Get your connection token →

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Blockchair. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

Why Choose Vinkius

Vinkius connects your tools to AI with real-time monitoring and automatic cost savings — all from one dashboard.

Connect Blockchair (Universal Blockchain Search Engine & API) now

Real-time monitoring

Live

visibility into every interaction

Connect your favorite tools to your AI and see exactly what's happening — every request, every response, in real time.

Built-in savings

60%

lower AI costs

Vinkius compresses data between your apps and your AI automatically. Lower bills every month — no configuration required.

Single dashboard

One

place for every integration

Every tool your AI connects to, managed from a single screen. One account, complete control.

Common questions about Blockchair (Universal Blockchain Search Engine & API) MCP in Claude Desktop

Open your `claude_desktop_config.json` file and add the Blockchair server configuration under the `mcpServers` key. Once you save the file and restart Claude Desktop, the tools will be ready to use in your chat input.

Yes, you can use the `push_transaction` tool to broadcast raw hex-encoded transactions directly from your chat. Simply paste the hex string and ask your agent to send it to the network.

Yes, the `get_xpub` tool allows you to retrieve data for an entire HD wallet structure using its xpub string. Claude Desktop parses the response to show you the aggregated balances and histories.

You use the `validate_address` tool to check if an address format is correct for a specific blockchain. Your agent runs the check instantly, preventing you from sending assets to an invalid destination.

Your queries, including addresses, xpubs, and transaction hashes, go directly to the API endpoint through Vinkius's secure sandbox. No private keys are ever touched or exposed, as the server only queries public ledger data.

Use it with your favorite AI tools

Connect this server to Cursor, Claude, VS Code, and more.

OpenAI Agents SDK sdk-python

Google ADK sdk-python

Pydantic AI sdk-python

Vercel AI SDK sdk-typescript