How to Use the Harmonyscan (Harmony One Block Explorer API) MCP in Cursor

Q: How do I configure the Harmonyscan (Harmony One Block Explorer API) in Cursor?

Create a file named mcp.json in your project's .cursor directory. Add the server configuration there, and Cursor's agent will automatically pick up the 14 available tools for querying the Harmony network.

Q: Does the Harmonyscan (Harmony One Block Explorer API) MCP server for Cursor let me see contract event logs?

It does. You can instruct your agent to use the getlogs tool with a contract address and topic hashes. It will fetch the event logs and can help you write code to parse them.

Let your Cursor agent write Harmony One dApp code using live on-chain data, not stubs or mock responses.

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Create your Vinkius account to connect Harmonyscan (Harmony One Block Explorer API) to Cursor 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 Cursor

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Generate Contract Interaction Code

Point your agent at a deployed Harmony contract. It uses `get_abi` and `get_source_code` to pull the contract's interface and implementation directly into your editor. You can stop digging through block explorer tabs for ABIs. From there, the agent can write the actual ethers.js or web3.js code to call that contract's functions. Because it has the real ABI, the code it generates works on the first try. You get functional, context-aware snippets dropped right into your active file.

Build Frontends with Real Data in Cursor

When you're building a UI, you need real data, not placeholders. Ask your agent to fetch transaction history for an address using `get_tx_list`. It gets the live response from the Harmonyscan API and can then generate a React component to display that data. This isn't just for transaction lists. You can get network stats like the current ONE price with `get_one_price` or total supply with `get_one_supply`. Your agent uses this live data to build dashboards or components that reflect the actual state of the Harmony network.

Query and Validate On-Chain State

Before you write code that depends on a wallet's balance, you can have your agent check it first with `get_balance`. The same goes for checking multiple wallets at once with `get_balance_multi`. This lets you write validation logic or tests based on actual on-chain state. This MCP Server also gives you a `proxy_request` tool for hitting any standard JSON-RPC method not covered by the other tools. It gives you an escape hatch for custom queries, all managed through the same secure connection.

Setup guide

Set up Harmonyscan (Harmony One Block Explorer API) MCP in Cursor

Prerequisites

Cursor installed (macOS, Windows, or Linux)
Active Vinkius subscription with a valid endpoint token

1

Open MCP Settings

Go to Cursor Settings → MCP or open the Command Palette (Cmd+Shift+P / Ctrl+Shift+P) and search for "MCP: Add Server".
2

Add the Harmonyscan (Harmony One Block Explorer API) MCP

Cursor will create or open .cursor/mcp.json in your project root. Paste the JSON snippet on the right. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Enable Agent mode

Open Composer (Cmd+I / Ctrl+I) and switch to Agent mode using the dropdown at the top. MCP tools are only available in Agent mode.
4

Verify the connection

Ask Cursor something like "List my recent Harmonyscan (Harmony One Block Explorer API) transactions." If the MCP tools are loaded correctly, Cursor will call the Harmonyscan (Harmony One Block Explorer API) tools automatically. You can also check Settings → MCP for a green status indicator.

.cursor/mcp.json

{
  "mcpServers": {
    "harmonyscan-harmony-one-block-explorer-api-mcp": {
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

Get your connection token →

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Harmonyscan. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about Harmonyscan (Harmony One Block Explorer API) MCP in Cursor

Create a file named `mcp.json` in your project's `.cursor` directory. Add the server configuration there, and Cursor's agent will automatically pick up the 14 available tools for querying the Harmony network.

Yes. Give the agent a list of Harmony addresses and ask it to use the `get_balance_multi` tool. It can then generate a Node.js script or a simple table that maps each address to its current ONE balance.

It does. You can instruct your agent to use the `get_logs` tool with a contract address and topic hashes. It will fetch the event logs and can help you write code to parse them.

This MCP server provides pre-built tools for common tasks, like `get_token_tx`, which would require complex filtering on a raw node. It simplifies queries and is managed for you by Vinkius, so you don't have to worry about uptime or rate limits.

The server processes public Harmony One identifiers that you supply in your code or chat, like contract addresses for `get_abi` or wallet addresses for `get_balance`. The Vinkius MCP server runs in a zero-trust sandbox, handling only the public data needed to call the Harmonyscan API. Your code never leaves your machine.

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