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

Q: How do I configure the Blockchair (Universal Blockchain Search Engine & API) MCP Server in Cursor?

Add the server configuration to your global /.cursor/mcp.json or project-specific .cursor/mcp.json file. Once saved, Cursor's Agent mode automatically detects the new tools for your next prompt.

Q: Can Cursor write tests using real data from Blockchair (Universal Blockchain Search Engine & API)?

Yes, Cursor uses tools like gettransaction and getblock to fetch live production data. The agent then writes unit tests based on actual, historical on-chain events.

Q: How does Blockchair (Universal Blockchain Search Engine & API) MCP in Cursor help debug smart contracts?

The getcontractcalls tool retrieves internal transaction traces for Ethereum contracts. Your agent analyzes these traces directly inside Cursor to locate why a specific transaction failed.

Write smart contracts and dApps in Cursor using live ledger data, transaction histories, and real-time block metrics.

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

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

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Setup Blockchair (Universal Blockchain Search Engine & API) with Cursor

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Live Address Audits in Your Cursor Editor

The `get_address` tool pulls live balances, historical transactions, and UTXO sets directly into your active Cursor coding file through this MCP Server. You can feed real-world wallet states straight to your Cursor agent to generate accurate test cases. Use `get_erc20_token_address` alongside it to pull specific token balances for your Cursor integration tests. Your Cursor agent writes code against actual Blockchair data instead of relying on stale, hardcoded mock objects.

Query Blockchain Metadata and Stats on the Fly

The `get_blockchain_stats` tool fetches current network metrics like gas prices, difficulty, and block heights directly into your Cursor workspace. This keeps your Cursor code aligned with the live network conditions without leaving your editor. When debugging, use `get_block` to inspect the exact structure of a recently mined block via the Cursor MCP interface. Your Cursor agent grabs the Blockchair payload and formats it, letting you analyze block headers and sizes instantly.

Verify and Push Raw Transactions via Agent Mode

The `push_transaction` tool lets you broadcast raw hex-encoded transactions to the network directly from Cursor's terminal or chat. You can build, sign, and broadcast transactions within a unified Cursor development loop. Run `validate_address` in Cursor before broadcasting to ensure your destination addresses match the target chain's format. This prevents deployment errors and ensures your transaction logic is sound before hitting the mainnet.

Setup guide

Set up Blockchair (Universal Blockchain Search Engine & API) MCP in Cursor

Prerequisites

Cursor installed (macOS, Windows, or Linux)
Active Vinkius subscription with a valid endpoint token

1

Open MCP Settings

Go to Cursor Settings → MCP or open the Command Palette (Cmd+Shift+P / Ctrl+Shift+P) and search for "MCP: Add Server".
2

Add the Blockchair (Universal Blockchain Search Engine & API) MCP

Cursor will create or open .cursor/mcp.json in your project root. Paste the JSON snippet on the right. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Enable Agent mode

Open Composer (Cmd+I / Ctrl+I) and switch to Agent mode using the dropdown at the top. MCP tools are only available in Agent mode.
4

Verify the connection

Ask Cursor something like "List my recent Blockchair (Universal Blockchain Search Engine & API) transactions." If the MCP tools are loaded correctly, Cursor will call the Blockchair (Universal Blockchain Search Engine & API) tools automatically. You can also check Settings → MCP for a green status indicator.

.cursor/mcp.json

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

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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.

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

Add the server configuration to your global `~/.cursor/mcp.json` or project-specific `.cursor/mcp.json` file. Once saved, Cursor's Agent mode automatically detects the new tools for your next prompt.

Yes, Cursor uses tools like `get_transaction` and `get_block` to fetch live production data. The agent then writes unit tests based on actual, historical on-chain events.

The `get_contract_calls` tool retrieves internal transaction traces for Ethereum contracts. Your agent analyzes these traces directly inside Cursor to locate why a specific transaction failed.

Yes, this server supports multiple major chains, including Bitcoin and Ethereum. You specify the target chain in your prompt, and the tools fetch the correct ledger data.

All queried addresses, transaction hashes, and block identifiers are processed in an isolated V8 sandbox on Vinkius. Your local codebase and private keys remain completely offline and untouched during these lookups.

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