How to Use the BlockCypher (Multi-chain Blockchain Developer API) MCP in OpenAI Agents SDK

Q: How do I initialize the BlockCypher (Multi-chain Blockchain Developer API) with the OpenAI Agents SDK?

Install the package using pip, then instantiate MCPServerStreamableHttp with your Vinkius endpoint URL. Pass this server instance in the mcpservers list when initializing your Agent object to register the MCP Server.

Q: Does caching tools improve performance in this setup?

Yes, setting cacheToolsList=True prevents the agent from querying the server schema on every turn. This cuts down latency when your agent frequently queries getblockbyhash.

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Connect BlockCypher (Multi-chain Blockchain Developer API) MCP to OpenAI Agents SDK

Create your Vinkius account to connect BlockCypher (Multi-chain Blockchain Developer API) to OpenAI Agents SDK 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 OpenAI Agents SDK

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Execute Ethereum smart contracts via OpenAI Agents SDK

Your OpenAI Agents SDK agents run contract calls by exposing `call_eth_contract_method` and `create_eth_contract` directly to the execution loop. The agent parses the ABI, prepares the transaction payload, and submits it without writing boilerplate Web3 code. You set runtime guardrails in your Python agent configuration to inspect the contract address before the tool fires. This keeps your main execution loop safe from unauthorized token drains or incorrect contract interactions.

Manage multi-chain transactions with automated signing

The `new_transaction` and `send_transaction` tools on this MCP Server let your agent build and broadcast raw transactions across Bitcoin or Ethereum networks. Your agent generates a skeleton payload, waits for your secure local signing step, and then pushes it to the network. Routing this through the OpenAI tracing dashboard gives you clear visibility into gas fees and payload structures before broadcasting. You can monitor exactly when your agent requested a transaction skeleton.

Real-time blockchain monitoring via this MCP Server

The `create_webhook` tool lets your agent set up instant HTTP callbacks for specific address activities. Instead of constantly polling the blockchain, the agent configures the webhook once and waits for BlockCypher to push updates. Your agent can run in the background, listening for incoming payments on addresses generated by `generate_address`. This reduces your API usage and keeps your agent's event loop highly responsive.

Setup guide

Set up BlockCypher (Multi-chain Blockchain Developer API) MCP in OpenAI Agents SDK

Prerequisites

Python 3.10+ installed
openai-agents package (pip install openai-agents)
Active Vinkius subscription with a valid endpoint token

1

Install the SDK

Run pip install openai-agents to install the OpenAI Agents SDK. The MCP integration is built-in — no extra dependencies needed.
2

Connect via SSE transport

Use MCPServerSse with your Vinkius endpoint URL. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. The SDK auto-discovers all BlockCypher (Multi-chain Blockchain Developer API) tools at runtime.
3

Create your Agent

Pass the MCP to Agent(mcp_servers=[server]). The agent receives BlockCypher (Multi-chain Blockchain Developer API) tools as native definitions — JSON schemas resolve automatically.
4

Run the agent

Call Runner.run(agent, prompt) to execute. The agent invokes the appropriate BlockCypher (Multi-chain Blockchain Developer API) tools and returns structured results. Copy the full example on the right to get started.

agent.py

import asyncio
from agents import Agent, Runner
from agents.mcp import MCPServerSse

async def main():
    async with MCPServerSse(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    ) as server:
        agent = Agent(
            name="BlockCypher (Multi-chain Blockchain Developer API) Agent",
            instructions="You have access to BlockCypher (Multi-chain Blockchain Developer API) tools.",
            mcp_servers=[server],
        )
        result = await Runner.run(agent, "List recent transactions")
        print(result.final_output)

asyncio.run(main())

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Common questions about BlockCypher (Multi-chain Blockchain Developer API) MCP in OpenAI Agents SDK

Install the package using pip, then instantiate `MCPServerStreamableHttp` with your Vinkius endpoint URL. Pass this server instance in the `mcp_servers` list when initializing your Agent object to register the MCP Server.

Yes, you can filter the tools exposed by the MCP Server during the server configuration step. This ensures your agent only sees specific tools like `get_address_balance` instead of write operations.

The server does not hold your private keys. Your agent calls `new_transaction` to get a transaction skeleton, which your local Python code signs before broadcasting via `send_transaction`.

Yes, setting `cacheToolsList=True` prevents the agent from querying the server schema on every turn. This cuts down latency when your agent frequently queries `get_block_by_hash`.

Your API tokens and transaction data are isolated within Vinkius's V8 sandboxed environment. The MCP Server never exposes your raw credentials to the LLM; they are injected securely on the server side to execute calls like `fund_bcy_test_address`.

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