The Hedera Testnet Mirror Node MCP server provides an interface to the Hedera Testnet Mirror Node API following the Model Context Protocol (MCP). Built with FastMCP and Zod validation, it converts Mirror Node API endpoints into MCP-compatible tools that clients can access.
Before running the server, ensure you have the following installed:
Follow these steps to install the MCP server:
git clone https://github.com/hedera-dev/mirrornode-mcp-server
cd mirrornode-mcp-server
npm install
Start the MCP server with the following command:
bun mcpServer.ts
Upon successful startup, you should see:
MCP server started
The server will be accessible via the SSE endpoint at:
http://localhost:3333/hedera-testnet-mirror-node-api/sse
The server creates an API client for the Hedera Testnet Mirror Node using the createApiClient
function. This MCP server acts as a proxy between the HTTP API client and its own SSE transport.
The server converts each endpoint definition into an MCP-compatible tool by:
The MCP server is started with SSE transport enabled, allowing clients to connect and use the exposed API tools.
To add this MCP server to Claude Code, run this command in your terminal:
claude mcp add-json "hedera-testnet-mirror-node-api" '{"command":"bun","args":["mcpServer.ts"]}'
See the official Claude Code MCP documentation for more details.
There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json
file so that it is available in all of your projects.
If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json
file.
To add a global MCP server go to Cursor Settings > Tools & Integrations and click "New MCP Server".
When you click that button the ~/.cursor/mcp.json
file will be opened and you can add your server like this:
{
"mcpServers": {
"hedera-testnet-mirror-node-api": {
"command": "bun",
"args": [
"mcpServer.ts"
]
}
}
}
To add an MCP server to a project you can create a new .cursor/mcp.json
file or add it to the existing one. This will look exactly the same as the global MCP server example above.
Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.
The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.
You can also explicitly ask the agent to use the tool by mentioning the tool name and describing what the function does.
To add this MCP server to Claude Desktop:
1. Find your configuration file:
~/Library/Application Support/Claude/claude_desktop_config.json
%APPDATA%\Claude\claude_desktop_config.json
~/.config/Claude/claude_desktop_config.json
2. Add this to your configuration file:
{
"mcpServers": {
"hedera-testnet-mirror-node-api": {
"command": "bun",
"args": [
"mcpServer.ts"
]
}
}
}
3. Restart Claude Desktop for the changes to take effect