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Connect Blockchair Universal Blockchain Search En to your AI

Set it up once and it works in ChatGPT, Claude, Cursor, and any other client you love. It all runs safely in the background, so you can relax and focus on what really matters. Pull real-time blockchain intelligence directly into your AI client.

Ask AI about this Connector

Developed, maintained, and hosted by Vinkius.

MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED

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Works with modern AI clients that support MCP, including ChatGPT, Claude, Cursor, and more.

ChatGPTClaudeCursorPerplexityGeminiMicrosoft CopilotRaycastMeta AI

Your AI does the work. We keep it safe and sound.

No other AI tool gives you this. Your workflow runs in the client you already love, your account stays protected, and you decide what the agent can and cannot do. It is the whole reason to make the switch.

Each Connector lives inside our infrastructure, the same place where your workflow runs. The three things below are already part of it, working quietly in the background so you never have to think about them. Nothing to add, nothing to set up, nothing to worry about.

A futuristic MCP client docking bay
V8 Isolate01

Each Connector runs inside its own sealed environment.

Each Connector runs inside its own sealed V8 runtime — no access to your files, your system, or other servers. A Connector never sees past its own request.

Kill Switch02

One switch stops every agent. Instantly.

One action deactivates every Connector, revokes every token, and ends every session at once. AI Governance keeps the record.

FinOps per User03

Spending limits that pause instead of surprise.

Every user keeps their own connections and credentials, isolated from everyone else. Anything that would cross your spending limit is held for your approval, not billed.

Three controls, built into the layer your AI connects through.

Curated set · 11 capabilities

We ship only the actions that matter.

Capability set01 / 03

01-04

4 capabilities in this set.

Part of 11 available through Blockchair.

  1. 01

    Get contract calls

    This capability fetches internal Ethereum contract transactions.

  2. 02

    Get blockchain stats

    Get real-time network health, difficulty, and block height for a specific chain.

  3. 03

    Get transaction

    This capability pulls specific details for a single transaction hash.

  4. 04

    Filter blocks

    This capability lets you query blocks using SQL-like filters for time or transaction counts.

Capability set02 / 03

05-08

4 capabilities in this set.

Part of 11 available through Blockchair.

  1. 05

    Filter transactions

    Query transactions using advanced filters like fee ranges or timeframes.

  2. 06

    Get address

    Retrieve the balance, transaction history, and UTXO set for a specific address.

  3. 07

    Get block

    Retrieve all relevant data regarding a specific block.

  4. 08

    Get erc20 token address

    Check the balance of a specific ERC-20 token for a given address.

Capability set03 / 03

09-11

3 capabilities in this set.

Part of 11 available through Blockchair.

  1. 09

    Get xpub

    Use this to retrieve data for an entire HD wallet using an extended public key.

  2. 10

    Push transaction

    This capability broadcasts a raw hex-encoded transaction directly to the network.

  3. 11

    Validate address

    Check if a specific wallet address is valid for its intended blockchain.

Real work

What teams actually run

01

Transaction Debugging

A developer asks the agent to check the details of a specific transaction hash to find out why it failed.

02

Wallet Tracking

An analyst uses the xpub capability to monitor the total activity of a specific HD wallet.

03

Network Health Checks

A user checks Bitcoin difficulty and block height to gauge network congestion.

04

Token Auditing

A user verifies the ERC-20 token balance of a specific Ethereum address.

Automate a task

Put Blockchair to work on one thing.

Step-by-step automations your AI runs through this Connector: the workflow, the prompts to start with, and the exact capabilities behind each move.

One connector, every AI

Blockchair works with the most popular AI clients.

These are the most popular clients, each with a step-by-step guide: one link, set up once, with governance and visibility built in. And because everything runs on the MCP standard, the same connection also works in any other compatible client — nothing to rebuild.

ClaudeClaudeChatGPTChatGPTGeminiGeminiPerplexityPerplexityGrokGrokMicrosoft CopilotMicrosoft CopilotCursorCursorVS CodeVS CodeWindsurfWindsurfJetBrainsJetBrainsClineClineLangChainLangChainVercel AI SDKVercel AI SDKLovableLovableZ.aiZ.aiRaycastRaycastQwen CodeQwen CodeKimi CodeKimi CodeLe ChatLe Chat

Building your own app? The connector is yours to use.

You don't need a client to put Blockchair to work: the same hosted connection plugs into your own applications and agent code, with the same governance on every request. Build with it, chat with it — one connection for both.

Observed, not estimated

958ms average. Fast in production.

Blockchair is checked daily against the live service.

Daily averagePeak 1238ms
Oct 3Today
Fastest day
747ms
Slowest day
1238ms
14-day trend
Slowing+15%

Connect your client

One URL. Every client.

Activate the Connector, copy your link, and paste it into the client you already use. 11 capabilities arrive ready to run.

Preview access · not provider authentication

The vk_preview_* token belongs to Vinkius preview infrastructure. It lets Claude discover and display the capabilities of Blockchair, so you can see the experience inside your AI.

It does not authenticate your account with Blockchair. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.

Blockchair Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_5UGquZAtkUXwg20SDzhN0BLiU6oYCsjOeodEugDs/mcp

Claude Desktop

Follow the steps below to connect in seconds.

  1. 1In Claude Desktop, open Settings → Connectors.
  2. 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
  3. 3Click Add and start a new chat — Blockchair capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "blockchair-universal-blockchain-search-engine-api-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_5UGquZAtkUXwg20SDzhN0BLiU6oYCsjOeodEugDs/mcp"
    }
  }
}
  • Claude
  • ChatGPT
  • Cursor
  • VS Code
  • Windsurf
  • Claude Code
  • JetBrains
  • Cline

Step-by-step instructions for each client are in the guide. How to connect

Guided setup for Claude? Set up Blockchair in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work Blockchair owners hand off.

This MCP is built for technical users who need to interact with blockchain data without switching to a web browser.

  • 01

    Web3 Developers

    They use the agent to debug transactions and verify contract states inside their IDE.

  • 02

    Data Analysts

    They use the filtering capabilities to extract specific datasets for research.

  • 03

    Crypto Enthusiasts

    They use natural language to track wallet balances and network congestion.

FAQ

Questions Blockchair owners ask.

  • 01

    Which blockchains does this MCP support?

    It supports over 20 networks, including major ones like Bitcoin, Ethereum, and Litecoin.

  • 02

    Do I need my own API key?

    Yes, you will need to enter your Blockchair API key to authenticate your requests.

  • 03

    Can I send transactions using this MCP?

    Yes, you can use the push_transaction capability to broadcast raw hex-encoded transactions to the network.

  • 04

    Can I filter transactions by specific fees?

    Yes, the filter_transactions capability allows you to use SQL-like filters to find transactions within specific fee ranges.

  • 05

    Is it compatible with Cursor or VS Code?

    Yes, this MCP works with any MCP-compatible client, including Cursor, Windsurf, and VS Code.

  • 06

    Can I search across different blockchains using this server?

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

  • 07

    How do I filter transactions by specific criteria like high fees?

    Use the filter_transactions capability. You can provide a query string q such as fee(10000..) to find transactions with fees over 10,000 units, and sort them using the s parameter.

  • 08

    Can I check the balance of a specific ERC-20 token on Ethereum?

    Yes, use the get_erc20_token_address capability by providing the token's contract address and the wallet address you want to check.

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