How to Use the Harmonyscan (Harmony One Block Explorer API) MCP in OpenAI Agents SDK

Q: How do I handle internal transactions?

Call the gettxlistinternal tool. It returns the exact trace of internal contract calls, which your agent can then analyze for complex DeFi routing logic.

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Connect Harmonyscan (Harmony One Block Explorer API) MCP to OpenAI Agents SDK

Create your Vinkius account to connect Harmonyscan (Harmony One Block Explorer 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 Harmonyscan (Harmony One Block Explorer API) with OpenAI Agents SDK

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Read Harmony data via MCP Server

Agents need real-time chain state to make decisions. Pass this MCP Server to your Agent constructor and your system immediately maps Harmony network data. Use `get_balance` and `get_balance_multi` to check ONE token holdings across multiple user wallets in a single pass. The OpenAI tracing dashboard logs every single call. When an agent runs `get_tx_list` or `get_token_tx` to audit HRC20 transfers, you see the exact payload and latency. Built-in guardrails prevent rogue agents from spamming the network with infinite queries.

Audit smart contracts instantly

Stop manually pasting addresses into a block explorer. Your agent pulls contract details directly into its context window using `get_abi` and `get_source_code`. It reads the raw code without leaving the execution loop. This means a specialized auditor agent can read the raw Solidity files while another agent cross-references execution history with `get_status`. You build multi-agent handoffs based on actual on-chain evidence.

Track network economics

Financial agents require accurate pricing and supply metrics. The `get_one_price` and `get_one_supply` tools feed live market data straight into your Python application. You get numbers you can trust. If you need deeper network mechanics, `get_block_reward` pulls validator payouts. You get raw JSON responses that the OpenAI framework parses automatically for downstream processing.

Setup guide

Set up Harmonyscan (Harmony One Block Explorer 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 Harmonyscan (Harmony One Block Explorer API) tools at runtime.
3

Create your Agent

Pass the MCP to Agent(mcp_servers=[server]). The agent receives Harmonyscan (Harmony One Block Explorer 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 Harmonyscan (Harmony One Block Explorer 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="Harmonyscan (Harmony One Block Explorer API) Agent",
            instructions="You have access to Harmonyscan (Harmony One Block Explorer 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 Harmonyscan (Harmony One Block Explorer API) MCP in OpenAI Agents SDK

Install openai-agents via pip. Create an MCPServerStreamableHttp instance with your endpoint URL and pass it to your agent's mcp_servers list. Set cacheToolsList=True to speed up tool discovery.

No. This integration is strictly read-only. It exposes tools like get_tx_receipt_status and get_logs for data retrieval, not for signing or broadcasting transactions.

Yes. You can route standard JSON-RPC methods through the proxy_request tool. The agent handles the payload formatting while OpenAI's guardrails validate the inputs.

Call the get_tx_list_internal tool. It returns the exact trace of internal contract calls, which your agent can then analyze for complex DeFi routing logic.

The server strictly reads public ledger data. When your agent queries wallet balances or transaction hashes, that specific query hits the Vinkius isolate sandbox before reaching the blockchain. Vinkius drops the request data immediately after the response routes back to your environment.

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