How to Use the BlockCypher (Multi-chain Blockchain Developer API) MCP in LlamaIndex

Q: Can I index contract events using BlockCypher (Multi-chain Blockchain Developer API) and LlamaIndex?

Yes. Your agent can call callethcontractmethod to read state variables and immediately index those outputs into your vector database for semantic search.

Q: Does the agent need a token to check testnet balances?

No. Tools like fundbcytestaddress and fundbethtestaddress run on testnets and do not require your primary production API token to execute.

Turn live blockchain transactions and wallet balances into searchable indexes inside your LlamaIndex RAG pipelines.

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Connect BlockCypher (Multi-chain Blockchain Developer API) MCP to LlamaIndex

Create your Vinkius account to connect BlockCypher (Multi-chain Blockchain Developer API) to LlamaIndex 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 BlockCypher (Multi-chain Blockchain Developer API) with LlamaIndex

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Indexing Blockchain Data with LlamaIndex

This BlockCypher MCP Server connects your indexer directly to live ledger data. Your agent uses `get_block_by_height` and `get_transaction` to pull raw transaction histories, which LlamaIndex then parses, embeds, and stores in your vector database. Instead of querying static documents, your RAG pipeline gets real-time answers grounded in actual on-chain events. The agent queries the index to find patterns in transaction metadata without hitting the rate limits of public nodes.

Semantic Queries on Address Balances

The `get_address_balance` tool feeds live financial metrics directly into your query engine. LlamaIndex maps these balances against historical address states retrieved via `get_address` to build a complete profile of a wallet's activity. This lets you build financial agents that answer complex questions about wallet behavior. The agent doesn't guess balances; it gets the exact satoshi or wei count and indexes it for immediate semantic search.

Event-Driven Knowledge Base Updates

The `create_webhook` tool lets your LlamaIndex pipeline subscribe to live chain events. When a transaction hits the network, the webhook fires, triggering your agent to pull the new data using `get_transaction`. This keeps your vector store constantly updated. You avoid stale data issues because the agent injects new blocks into the index the moment they are mined.

Setup guide

Set up BlockCypher (Multi-chain Blockchain Developer API) MCP in LlamaIndex

Prerequisites

Python 3.10+ installed
llama-index-tools-mcp package
Active Vinkius subscription with a valid endpoint token

1

Install dependencies
Run pip install llama-index-tools-mcp llama-index-llms-openai. The MCP tools package provides BasicMCPClient and McpToolSpec.
2

Connect with BasicMCPClient
Point BasicMCPClient to your Vinkius endpoint URL. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. Supports SSE and Streamable HTTP transports.
3

Convert to LlamaIndex tools
Call mcp_tool_spec.to_tool_list_async() to convert all BlockCypher (Multi-chain Blockchain Developer API) MCP tools into native FunctionTool objects that any LlamaIndex agent can use.
4

Run with any LLM
Create a FunctionAgent with the tools and your preferred LLM. Swap OpenAI for Anthropic, Gemini, or any LlamaIndex-supported provider.

agent.py

from llama_index.tools.mcp import BasicMCPClient, McpToolSpec
from llama_index.core.agent.workflow import FunctionAgent
from llama_index.llms.openai import OpenAI

# Connect to the MCP
mcp_client = BasicMCPClient(
    "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
)
mcp_tool_spec = McpToolSpec(client=mcp_client)

# Convert MCP tools to LlamaIndex tools
tools = await mcp_tool_spec.to_tool_list_async()

# Create and run the agent
agent = FunctionAgent(
    tools=tools,
    llm=OpenAI(model="gpt-4o"),
    system_prompt="You have access to BlockCypher (Multi-chain Blockchain Developer API) tools.",
)
response = await agent.run("List recent BlockCypher (Multi-chain Blockchain Developer API) data")

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Common questions about BlockCypher (Multi-chain Blockchain Developer API) MCP in LlamaIndex

Install llama-index-tools-mcp. Create a BasicMCPClient MCP client pointing to your Vinkius URL, wrap it in McpToolSpec, and convert it to a tool list for your FunctionAgent.

Yes. Your agent can call `call_eth_contract_method` to read state variables and immediately index those outputs into your vector database for semantic search.

LlamaIndex uses the MCP tool definitions to fetch only the necessary blocks via `get_block_by_hash`. It caches the results in your index, minimizing redundant external API hits.

No. Tools like `fund_bcy_test_address` and `fund_beth_test_address` run on testnets and do not require your primary production API token to execute.

They are never stored or exposed. The MCP Server only returns public data through `get_address` or constructs unsigned payloads via `new_transaction`, keeping your private keys entirely offline.

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