How to Use the Nominatim MCP in Mastra AI

Q: How do I run Nominatim reverse geocoding inside Mastra AI?

Trigger the reversegeocode tool by passing latitude and longitude coordinates from your workflow context. The agent receives structured address fields to use in subsequent database updates.

Build resilient, multi-step GIS workflows using Nominatim tools inside your Mastra AI agentic pipelines.

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Connect Nominatim MCP to Mastra AI

Create your Vinkius account to connect Nominatim to Mastra AI 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 Nominatim with Mastra AI

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Automate address validation with zero API keys

The `search` tool resolves raw text addresses into structured geographic data blocks. This MCP Server helps Mastra AI agents validate shipping destinations, automatically correcting spelling mistakes and formatting errors during workflow execution. If a query fails, Mastra's built-in retry mechanisms handle the rate limit gracefully. You avoid the high costs of proprietary geocoding APIs while maintaining high data accuracy.

Run batch coordinate lookups in Mastra AI

The `lookup_osm` tool pulls full display names, bounding boxes, and properties for multiple OpenStreetMap IDs simultaneously. This MCP Server lets your Mastra AI workflows process entire batches of geographical objects in a single logical step. Your agent can branch its logic based on the returned place rank or importance score. For example, you can route high-importance nodes to premium delivery pipelines while keeping standard locations on default paths.

Check server health before executing workflows

The `get_status` tool verifies the connection latency and operational state of the geocoding service. Your Mastra AI workflows can call this tool as an initial guardrail before running heavy location-processing pipelines. This step prevents your agents from getting stuck in long timeout loops when public servers are congested. If the status check fails, the workflow redirects tasks to a cached backup.

Setup guide

Set up Nominatim MCP in Mastra AI

Prerequisites

Node.js 18+ and a TypeScript project
@mastra/mcp + @mastra/core packages
Active Vinkius subscription with a valid endpoint token

1

Install dependencies
Run npm install @mastra/mcp @mastra/core plus your preferred model provider (e.g. @ai-sdk/openai).
2

Configure the MCPClient
Create an MCPClient with your Vinkius endpoint as a URL object. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Discover and inject tools
Call mcpClient.listTools() and spread the result into your agent's tools object. All Nominatim tools become native Mastra tools.
4

Run with any model
Swap openai("gpt-4o") for any AI SDK-compatible provider. Call agent.generate() and the agent routes tool calls through MCP automatically.

agent.ts

import { MCPClient } from "@mastra/mcp";
import { Agent } from "@mastra/core/agent";
import { openai } from "@ai-sdk/openai";

const mcpClient = new MCPClient({
  id: "nominatim-mcp-client",
  servers: {
    "nominatim-mcp": {
      url: new URL(
        "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
      ),
    },
  },
});

const agent = new Agent({
  name: "Nominatim Agent",
  model: openai("gpt-4o"),
  instructions: "You have access to Nominatim tools.",
  tools: {
    ...(await mcpClient.listTools()),
  },
});

const result = await agent.generate(
  "List recent Nominatim transactions"
);
console.log(result.text);

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Common questions about Nominatim MCP in Mastra AI

You configure Mastra AI workflow steps with exponential backoff. This ensures your agent pauses between calls to the search tool, preventing public endpoint bans.

Yes. You instruct your Mastra AI agent to pass specific ISO country codes directly into the search tool parameters to narrow the focus.

Trigger the reverse_geocode tool by passing latitude and longitude coordinates from your workflow context. The agent receives structured address fields to use in subsequent database updates.

Format your IDs as a single character representing the type followed by the numeric ID, such as N12345 for nodes or W67890 for ways. You can pass multiple comma-separated IDs to the lookup_osm tool.

Your address strings and coordinates flow strictly between your local Mastra AI runtime and the Nominatim endpoint. Vinkius runs this MCP Server in an isolated sandbox, ensuring no permanent storage of your geographic queries.

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