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cryptoapis-mcp-block-data

cryptoapis-mcp-block-data

Official

@cryptoapis-io/mcp-block-data

MCP server for Crypto APIs Block Data product. Get block details by height or hash for EVM, UTXO, and XRP blockchains.

API Version: Compatible with Crypto APIs version 2024-12-12

Features

  • Get block details by block height or block hash

  • List transactions by block height or block hash

  • Get last mined block and list latest mined blocks

  • Supported EVM chains: Ethereum, Ethereum Classic, BSC, Polygon, Avalanche (C-Chain), Arbitrum, Base, Optimism, Tron

  • Supported UTXO chains: Bitcoin, Bitcoin Cash, Litecoin, Dogecoin, Dash, Zcash

  • Supported other: XRP (mainnet, testnet)

Related MCP server: @cryptoapis-io/mcp-prepare-transactions

Prerequisites

Installation

npm install @cryptoapis-io/mcp-block-data

Or install all Crypto APIs MCP servers: npm install @cryptoapis-io/mcp

Usage

# Run with API key
npx @cryptoapis-io/mcp-block-data --api-key YOUR_API_KEY

# Or use environment variable
export CRYPTOAPIS_API_KEY=YOUR_API_KEY
npx @cryptoapis-io/mcp-block-data

# HTTP transport (listens on 127.0.0.1; see "Exposing the server beyond localhost")
npx @cryptoapis-io/mcp-block-data --transport http --port 3000 --api-key YOUR_API_KEY

Claude Desktop

Add to your Claude Desktop config (~/Library/Application Support/Claude/claude_desktop_config.json on macOS, %APPDATA%\Claude\claude_desktop_config.json on Windows):

{
  "mcpServers": {
    "cryptoapis-block-data": {
      "command": "npx",
      "args": ["-y", "@cryptoapis-io/mcp-block-data"],
      "env": {
        "CRYPTOAPIS_API_KEY": "your_api_key_here"
      }
    }
  }
}

Cursor

Add to .cursor/mcp.json (project) or ~/.cursor/mcp.json (global):

{
  "mcpServers": {
    "cryptoapis-block-data": {
      "command": "npx",
      "args": ["-y", "@cryptoapis-io/mcp-block-data"],
      "env": {
        "CRYPTOAPIS_API_KEY": "your_api_key_here"
      }
    }
  }
}

MCP Inspector

npx @modelcontextprotocol/inspector npx @cryptoapis-io/mcp-block-data --api-key YOUR_API_KEY

n8n

  1. Start the server in HTTP mode:

    npx @cryptoapis-io/mcp-block-data --transport http --port 3000 --api-key YOUR_API_KEY
  2. In your n8n workflow, add an AI Agent node

  3. Under Tools, add an MCP Client Tool and set the URL to http://localhost:3000/mcp

n8n in Docker: localhost inside the container is not your machine. Start the server with --host 0.0.0.0 and MCP_AUTH_TOKEN set (see Exposing the server beyond localhost), use http://host.docker.internal:3000/mcp as the URL, and add an Authorization: Bearer <token> header to the MCP Client Tool credential.

All servers default to port 3000. Use --port to assign different ports when running multiple servers.

Available Tools

evm_block_data

Get EVM block details.

Action

Description

get-block-by-height

Get block details by block number

get-block-by-hash

Get block details by block hash

list-transactions-by-block-height

List transactions in a block by block height

list-transactions-by-block-hash

List transactions in a block by block hash

get-last-mined-block

Get the latest mined block details

list-latest-mined-blocks

List the latest mined blocks

utxo_block_data

Get UTXO block details (Bitcoin, Bitcoin Cash, Litecoin, Dogecoin, Dash, Zcash).

Action

Description

get-block-by-height

Get block details by block number

get-block-by-hash

Get block details by block hash

list-transactions-by-block-height

List transactions in a block by block height

list-transactions-by-block-hash

List transactions in a block by block hash

get-last-mined-block

Get the latest mined block details

list-latest-mined-blocks

List the latest mined blocks

xrp_block_data

Get XRP block (ledger) details.

Action

Description

get-block-by-height

Get ledger details by ledger index

get-block-by-hash

Get ledger details by ledger hash

list-transactions-by-block-height

List transactions in a block by block height

list-transactions-by-block-hash

List transactions in a block by block hash

get-last-mined-block

Get the latest mined block details

list-latest-mined-blocks

List the latest mined blocks

CLI Arguments

Argument

Description

Default

--api-key

Crypto APIs API key

CRYPTOAPIS_API_KEY env var

--transport

Transport type: stdio or http

stdio

--host

HTTP host (use 0.0.0.0 to accept remote connections — requires an auth token with --api-key)

127.0.0.1

--auth-token

Bearer token callers must send (Authorization: Bearer <token>); prefer the MCP_AUTH_TOKEN env var

MCP_AUTH_TOKEN env var

--allowed-hosts

Comma-separated Host header allowlist for non-loopback binds

—

--port

HTTP port

3000

--path

HTTP path

/mcp

--stateless

Enable stateless HTTP mode

false

HTTP API Key Modes

When using HTTP transport, the server supports two API key modes:

  • With --api-key: The key is used for all requests. x-api-key request headers are ignored.

  • Without --api-key: Each request must include an x-api-key header with a valid Crypto APIs key. This enables hosting a public server where each user provides their own key.

# Per-request key mode (multi-tenant)
npx @cryptoapis-io/mcp-block-data --transport http --port 3000
# Clients send x-api-key header with each request

Exposing the server beyond localhost

HTTP mode listens on 127.0.0.1 by default, so only processes on the same machine can reach it. To accept connections from other machines or containers, bind explicitly and protect the port:

# Startup-key mode: callers must present the token (the server refuses to start without one)
export MCP_AUTH_TOKEN=$(openssl rand -hex 32)
npx @cryptoapis-io/mcp-block-data --transport http --host 0.0.0.0 --port 3000 --api-key YOUR_API_KEY \
  --allowed-hosts mcp.internal.example
# Clients send: Authorization: Bearer $MCP_AUTH_TOKEN

# Per-request key mode: no startup key, every request must carry the caller's own x-api-key
npx @cryptoapis-io/mcp-block-data --transport http --host 0.0.0.0 --port 3000

--allowed-hosts restricts the Host header (DNS rebinding protection) when not bound to loopback. Prefer MCP_AUTH_TOKEN over --auth-token: command-line arguments are visible in the process list.

Stdio transport always requires an API key at startup.

Important: API Key Required

Warning: Making requests without a valid API key — or with an incorrect one — may result in your IP being banned from the Crypto APIs ecosystem. Always ensure a valid API key is configured before starting any server.

Remote MCP Server

Crypto APIs provides an official remote MCP server with all tools available via HTTP Streamable transport at https://ai.cryptoapis.io/mcp. Pass your API key via the x-api-key header — no installation required.

License

MIT

Available Tools

4 tools
evm_block_dataB

Get EVM block details (Block Data product).

Actions: • get-block-by-height: Get block details by block height (number) • get-block-by-hash: Get block details by block hash • list-transactions-by-block-hash: List transactions in a block by block hash • list-transactions-by-block-height: List transactions in a block by block height • get-last-mined-block: Get the latest mined block details • list-latest-mined-blocks: List the latest mined blocks

Blockchain → Networks: • ethereum: mainnet, sepolia • ethereum-classic: mainnet, mordor • binance-smart-chain: mainnet, testnet • polygon: mainnet, amoy • tron: mainnet, nile • avalanche (C-Chain): mainnet, fuji • arbitrum: mainnet, sepolia • base: mainnet, sepolia • optimism: mainnet, sepolia

Credits by action (source: OpenAPI): • get-block-by-hash: arbitrum 48, avalanche 54, base 36, binance-smart-chain 75, ethereum 30, ethereum-classic 39, optimism 42, polygon 60, tron 45 • get-block-by-height: arbitrum 48, avalanche 54, base 36, binance-smart-chain 75, ethereum 30, ethereum-classic 39, optimism 42, polygon 60, tron 45 • get-last-mined-block: arbitrum 48, avalanche 54, base 36, binance-smart-chain 75, ethereum 30, ethereum-classic 39, optimism 42, polygon 60, tron 45 • list-latest-mined-blocks: arbitrum 48, avalanche 54, base 36, binance-smart-chain 75, ethereum 30, ethereum-classic 39, optimism 42, polygon 60, tron 45 • list-transactions-by-block-hash: arbitrum 48, avalanche 54, base 36, binance-smart-chain 75, ethereum 30, ethereum-classic 39, optimism 42, polygon 60, tron 45 • list-transactions-by-block-height: arbitrum 48, avalanche 54, base 36, binance-smart-chain 75, ethereum 30, ethereum-classic 39, optimism 42, polygon 60, tron 45

Credits are indicative only and may change at any time. The actual credits spent for each API request are returned in the response headers.

NameRequiredDescriptionDefault
countNoNumber of blocks to return (for list-latest-mined-blocks)
limitNoNumber of items to return (max 50)
actionYesAction to perform
offsetNoPagination offset
contextNoOptional context for the request - echoed back in response
networkYesNetwork name
blockHashNoBlock hash (required for get-block-by-hash, list-transactions-by-block-hash)
blockchainYesBlockchain protocol
blockHeightNoBlock height (required for get-block-by-height, list-transactions-by-block-height)
system_infoA

CryptoAPIs reference documentation — no API call, no credits consumed.

Actions: • blockchains — Supported blockchains, networks, products per chain, denominations, fiat currencies • errors — Complete error code table (HTTP status, error code, message) • credits — Credit charging structure, cost multipliers per blockchain, monitoring & operations taxes (xPub, synced addresses, blockchain events), pay-as-you-go • callbacks — Webhook mechanics: URL requirements, retry strategy (5 retries, exponential backoff), HMAC security, idempotency • limits — Throughput soft/hard limits per plan, 2.1x penalty multiplier, rate limiting behavior

NameRequiredDescriptionDefault
actionYesReference topic to retrieve
contextNoOptional context for the request - echoed back in response
utxo_block_dataC

Get UTXO block details (Block Data product).

Actions: • get-block-by-height: Get block details by block height (number) • get-block-by-hash: Get block details by block hash • list-transactions-by-block-height: List transactions in a block by block height • list-transactions-by-block-hash: List transactions in a block by block hash • get-last-mined-block: Get the latest mined block details • list-latest-mined-blocks: List the latest mined blocks

Blockchain → Networks: • bitcoin: mainnet, testnet • bitcoin-cash: mainnet, testnet • litecoin: mainnet, testnet • dogecoin: mainnet, testnet • dash: mainnet, testnet • zcash: mainnet, testnet

Credits by action (source: OpenAPI): • get-block-by-hash: bitcoin 20, bitcoin-cash 24, dash 22, dogecoin 22, litecoin 22, zcash 26 • get-block-by-height: bitcoin 20, bitcoin-cash 24, dash 22, dogecoin 22, litecoin 22, zcash 26 • get-last-mined-block: bitcoin 20, bitcoin-cash 24, dash 22, dogecoin 22, litecoin 22, zcash 26 • list-latest-mined-blocks: bitcoin 20, bitcoin-cash 24, dash 22, dogecoin 22, litecoin 22, zcash 26 • list-transactions-by-block-hash: bitcoin 20, bitcoin-cash 24, dash 22, dogecoin 22, litecoin 22, zcash 26 • list-transactions-by-block-height: bitcoin 20, bitcoin-cash 24, dash 22, dogecoin 22, litecoin 22, zcash 26

Credits are indicative only and may change at any time. The actual credits spent for each API request are returned in the response headers.

NameRequiredDescriptionDefault
countNoNumber of blocks to return (for list-latest-mined-blocks)
limitNoNumber of items to return (max 50)
actionYesAction to perform
offsetNoPagination offset
contextNoOptional context for the request - echoed back in response
networkYesNetwork name
blockHashNoBlock hash (required for get-block-by-hash, list-transactions-by-block-hash)
blockchainYesBlockchain protocol
blockHeightNoBlock height (required for get-block-by-height, list-transactions-by-block-height)
xrp_block_dataA

Get XRP block details (Block Data product). Path uses network only (no blockchain). Networks: mainnet, testnet.

Actions: • get-block-by-height: Get block details by block height (number) • get-block-by-hash: Get block details by block hash • list-transactions-by-block-height: List transactions in a block by block height • list-transactions-by-block-hash: List transactions in a block by block hash • get-last-mined-block: Get the latest mined block details • list-latest-mined-blocks: List the latest mined blocks

Credits by action (source: OpenAPI): • get-block-by-hash: 20 • get-block-by-height: 20 • get-last-mined-block: 20 • list-latest-mined-blocks: 20 • list-transactions-by-block-hash: 20 • list-transactions-by-block-height: 20

Credits are indicative only and may change at any time. The actual credits spent for each API request are returned in the response headers.

NameRequiredDescriptionDefault
countNoNumber of blocks to return (for list-latest-mined-blocks)
limitNoNumber of items to return (max 50)
actionYesAction to perform
offsetNoPagination offset
contextNoOptional context for the request - echoed back in response
networkYesNetwork name: mainnet or testnet
blockHashNoBlock hash (required for get-block-by-hash, list-transactions-by-block-hash)
blockHeightNoBlock height (required for get-block-by-height, list-transactions-by-block-height)

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

  1. 4 tool updatesv0.4.0
    • First observedevm_block_data
    • First observedsystem_info
    • First observedutxo_block_data
    • First observedxrp_block_data

TDQS

A3.7/5.0

Scored across 4 tools

Disambiguation5/5

Each tool is clearly scoped to a distinct blockchain family (EVM, UTXO, XRP) or system reference, with no overlap in purpose. The actions within each block data tool are identical but apply to different networks, making selection dependent on the target blockchain—a clear and unambiguous decision.

Naming Consistency5/5

All block data tools follow the same naming pattern: {family}_block_data (e.g., evm_block_data, utxo_block_data, xrp_block_data), and the actions inside each are uniformly named (get-block-by-height, list-transactions-by-hash, etc.). system_info breaks the pattern but is logically distinct and still uses a simple noun convention.

Tool Count4/5

With only 4 tools, the count is on the lower end, but each block data tool encapsulates 6 actions across many blockchains, providing substantial functionality. This is a focused server for block data retrieval, so the tool count is reasonable, though the surface could be expanded with more specific tools if needed.

Completeness4/5

The tools cover the core block lifecycle: fetching blocks by height/hash and listing transactions in blocks, plus latest block retrieval. A notable missing operation is a direct transaction lookup by hash/txid, which would be a natural addition. Overall, the surface is solid for block data but has a minor gap in transaction-level access.

Maintenance

ActivitySlowing
ResponsivenessNo recent community issues

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