How to Use the Nearblocks (Near Blockchain Explorer API) MCP in OpenAI Agents SDK

Q: What kind of data can I get from the NEAR blockchain?

You can query for account balances, token holdings (getaccounttokens), transaction histories (getaccounttransactions), block details, and overall network statistics. It's read-only access to the entire explorer API.

Build production-grade agents that query the NEAR blockchain with the safety of the OpenAI Agents SDK.

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Connect Nearblocks (Near Blockchain Explorer API) MCP to OpenAI Agents SDK

Create your Vinkius account to connect Nearblocks (Near Blockchain 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 Nearblocks (Near Blockchain Explorer API) with OpenAI Agents SDK

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Build Auditable On-Chain Monitors

Give your agent the ability to watch NEAR accounts. Use `get_account_transactions` to get a history of activity or `get_account_inventory` to check for specific NFTs. This isn't just a simple API call. The OpenAI Agents SDK wraps each tool, so you get a full trace of every action. You can see exactly which account your agent checked and what data it got back, right in the OpenAI dashboard. It's perfect for building systems that need to be debugged and trusted.

Hand Off Tasks Between Specialized Agents

Create an agent that specializes in market analysis. It can use `get_network_stats` to check gas prices and `get_token_list` to find new tokens. This gives it a high-level view of the network. When it finds something interesting, it can hand off the token's contract address to another agent. That second agent, focused on deep dives, then uses `get_token_details` and `get_recent_transactions` to investigate further. This is how you build complex, multi-agent workflows.

Query NEAR with your OpenAI Agent

This MCP server exposes 11 tools for reading NEAR blockchain data. Your agent can find the latest blocks with `get_latest_blocks` or dig into a specific transaction with `get_transaction_details`. Since the tools are auto-discovered, setup is minimal. Your agent gets direct access to on-chain information without you writing custom integration code. It just works.

Setup guide

Set up Nearblocks (Near Blockchain 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 Nearblocks (Near Blockchain Explorer API) tools at runtime.
3

Create your Agent

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

You instantiate the MCP server and pass it to your Agent constructor. The SDK automatically discovers all 11 tools, like `get_account_details`, making them available for your agent to call.

Yes. While the OpenAI Agents SDK auto-discovers the toolset, you can implement your own guardrails and permission logic before executing an action to restrict access to certain tools.

Yes. The connection is handled by a sandboxed MCP server. Your agent's credentials and state are isolated from the data source, and Vinkius manages the auth token.

You can query for account balances, token holdings (`get_account_tokens`), transaction histories (`get_account_transactions`), block details, and overall network statistics. It's read-only access to the entire explorer API.

The server only processes public NEAR blockchain data, like account transaction histories and token inventories. Vinkius provides an ephemeral, zero-trust environment, so your agent's internal state and OpenAI keys are never exposed to the server.

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