tatumio/blockchain-mcp

A Model Context Protocol (MCP) server that exposes the Tatum Blockchain Data API and RPC Gateway so LLM clients can query blockchain data across **130+ networks**. Get an API key on the Tatum MCP page or dashboard.
Features
- **130+ Blockchain Networks**: Bitcoin, Ethereum, Solana, Polygon, Arbitrum, Base, Avalanche, and many more.
- 🔗 **Blockchain Data API**: Blocks, transactions, balances, network info, and more.
- 🌐 **RPC Gateway**: Direct access to blockchain RPC endpoints.
Requires Node.js **18+** and a TATUM_API_KEY.
Installation
Or use without a global install:
Published binaries: blockchain-mcp and blockchain-mcp-server (same entrypoint).
MCP client setup
1. Create a free API key at dashboard.tatum.io.
2. Add the server to your MCP client (Cursor, Claude Desktop, VS Code, etc.):
Do not commit API keys. Use environment variables in client config only.
Example prompts
Once connected, you can ask your assistant to use MCP tools, for example:
- “What is the BTC/USD exchange rate?” → get_exchange_rate with symbol: BTC, basePair: USD
- “Show Vitalik’s native ETH balance history” → get_wallet_portfolio / get_transaction_history on ethereum-mainnet
- “What is the latest Ethereum block number?” → gateway_execute_rpc with eth_blockNumber
Chain identifiers use Tatum gateway names (e.g. ethereum-mainnet, bitcoin-mainnet). Call gateway_get_supported_chains for the live list.
Available tools (13)
Blockchain Data (10)
| Tool | Description |
|------|-------------|
| get_metadata | NFT/multitoken metadata by contract address and token IDs |
| get_wallet_balance_by_time | Native wallet balance at a block or timestamp |
| get_wallet_portfolio | Wallet portfolio (native, fungible, NFT) |
| get_owners | Owners of an NFT or token contract |
| check_owner | Whether an address owns a given token |
| get_transaction_history | Transaction history for one or more addresses |
| get_block_by_time | Block info for a timestamp |
| get_tokens | Token metadata (contract address or native) |
| check_malicious_address | Security check for a wallet/contract address |
| get_exchange_rate | Fiat/crypto rate (e.g. BTC / USD) |
RPC Gateway (3)
| Tool | Description |
|------|-------------|
| gateway_get_supported_chains | All networks available through the gateway |
| gateway_get_supported_methods | RPC/REST methods supported for a chain |
| gateway_execute_rpc | Run a JSON-RPC method or REST call on a chain |
Supported networks
Tatum supports many EVM and non-EVM chains. Examples: