How to Use the Cronoscan (Cronos Block Explorer) MCP in OpenAI Agents SDK

Q: Can my OpenAI agent read smart contract data from Cronoscan (Cronos Block Explorer)?

Yes. Your agent can call getsourcecode to get the source for verified contracts and getabi to fetch the contract's ABI. It's ideal for building agents that need to understand how a contract works.

Q: What's the best way to track token transfers with Cronoscan (Cronos Block Explorer) using the OpenAI Agents SDK?

Use the gettokentx tool for ERC20 tokens or gettokennfttx for ERC721s. Your agent can specify an address and get a list of all relevant transfer events, which is great for building portfolio trackers or activity monitors.

Q: Can I check multiple CRO wallet balances at once?

Absolutely. The getbalancemulti tool in this MCP Server is designed for exactly that. Just provide a list of addresses, and it returns the CRO balance for each one in a single call.

Build production-grade Cronos agents with the OpenAI Agents SDK. Monitor balances, trace transactions, and inspect contracts with built-in guardrails.

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Connect Cronoscan (Cronos Block Explorer) MCP to OpenAI Agents SDK

Create your Vinkius account to connect Cronoscan (Cronos Block Explorer) 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 Cronoscan (Cronos Block Explorer) with OpenAI Agents SDK

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Monitor Wallets and Transactions

This MCP Server lets your agent check CRO balances and transaction histories. You can pull a single address balance with `get_balance` or batch them with `get_balance_multi`. The OpenAI SDK is designed for specialized agents, so one can focus on wallet monitoring while another handles contract analysis. Then, you can trace a user's activity by fetching their transaction lists using `get_tx_list` for normal txs and `get_tx_list_internal` for internal ones. The SDK's tracing dashboard gives you a full view of every tool call your agent makes, so you know exactly what data it's pulling from the Cronos chain.

Inspect Contracts with Guardrails

Dig into smart contracts without leaving your code. Your agent can grab the ABI and source code for any verified contract using `get_abi` and `get_source_code`. This is perfect for building agents that audit or interact with specific on-chain protocols. Before your agent acts, it can simulate a call with `proxy_eth_call` or get a gas fee using `proxy_eth_estimate_gas`. OpenAI's guardrails will validate these actions before they run, which prevents your agent from making costly mistakes on the live Cronos network.

Get Real-Time Chain State with this MCP Server

Your agent gets direct access to the Cronos chain's current state. It can check the latest block number with `proxy_eth_block_number` or find the total CRO supply using `get_eth_supply`. These tools give your agent the ground truth it needs to make informed decisions. You can also check the status of a pending transaction with `get_tx_receipt_status`. Because the OpenAI Agents SDK supports handoffs, you could have one agent submit a transaction and a second, separate agent monitor its confirmation status using this tool.

Setup guide

Set up Cronoscan (Cronos Block Explorer) 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 Cronoscan (Cronos Block Explorer) tools at runtime.
3

Create your Agent

Pass the MCP to Agent(mcp_servers=[server]). The agent receives Cronoscan (Cronos Block Explorer) tools as native definitions — JSON schemas resolve automatically.
4

Run the agent

Call Runner.run(agent, prompt) to execute. The agent invokes the appropriate Cronoscan (Cronos Block Explorer) 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="Cronoscan (Cronos Block Explorer) Agent",
            instructions="You have access to Cronoscan (Cronos Block Explorer) 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 Cronoscan (Cronos Block Explorer) MCP in OpenAI Agents SDK

You just need to install the SDK and pass the Vinkius URL to the `MCPServerStreamableHttp` constructor. This MCP Server's tools are discovered automatically, so your agent can start querying Cronos data right away.

Yes. Your agent can call `get_source_code` to get the source for verified contracts and `get_abi` to fetch the contract's ABI. It's ideal for building agents that need to understand how a contract works.

Use the `get_token_tx` tool for ERC20 tokens or `get_token_nft_tx` for ERC721s. Your agent can specify an address and get a list of all relevant transfer events, which is great for building portfolio trackers or activity monitors.

Absolutely. The `get_balance_multi` tool in this MCP Server is designed for exactly that. Just provide a list of addresses, and it returns the CRO balance for each one in a single call.

It only processes public Cronos blockchain data you request, like wallet addresses and transaction hashes. Your OpenAI credentials stay within your environment. Vinkius isolates each request in a sandboxed environment, and since the OpenAI SDK handles the tool calls, you get their built-in security and tracing on top.

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