Sthan Io

npm version License: MIT

MCP server for sthan.io — give your AI assistant the ability to verify, parse, autocomplete, and geocode US addresses, and look up IP geolocation. Works with Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, and any MCP-compatible client.

8 tools · TypeScript · stdio transport · Free tier, no credit card required.

---

Why use it

• Real US postal data — addresses are verified against authoritative postal records, not heuristics. Returns delivery point validation (DPV), ZIP+4, residential/commercial flag.
• Sub-100ms autocomplete — typeahead-grade response times for address, city, and ZIP suggestions.
• Strong geocoding — forward geocoding returns accuracy classification (rooftop / interpolated / centroid / approximate) plus a confidence score, so your AI knows when to trust the result.
• IPv4 + IPv6 geolocation — country, region, city, coordinates, timezone, postal code.
• Free tier with no credit card — get a key in under a minute at sthan.io/dashboard.

Tools

Tool	What it does
sthan_verify_address	Verify a US address is real and deliverable. Returns standardized format, ZIP+4, DPV, residential/commercial.
sthan_parse_address	Parse freeform US address text into structured components (street number, name, type, direction, unit, city, state, zip).
sthan_autocomplete_address	Suggest complete US addresses from partial input. Sub-100ms.
sthan_autocomplete_city	Suggest US cities from partial input, with state code.
sthan_autocomplete_zipcode	Suggest US ZIP codes from partial input.
sthan_geocode	US address → latitude/longitude with accuracy + confidence.
sthan_reverse_geocode	Latitude/longitude → nearest US street address with distance in meters.
sthan_ip_geolocation	IPv4 or IPv6 → country, region, city, coordinates, timezone, postal code.

Quick start

1. Get a free API key

Sign up at sthan.io and create a key from the dashboard. No credit card.

2. Add to your MCP client

Claude Desktop / Claude Code (~/.claude/mcp.json or project .claude/mcp.json):

{
  "mcpServers": {
    "sthan": {
      "command": "npx",
      "args": ["-y", "@sthan/mcp-server"],
      "env": { "STHAN_API_KEY": "sthan_test_your_key_here" }
    }
  }
}

Cursor (.cursor/mcp.json):

{
  "mcpServers": {
    "sthan": {
      "command": "npx",
      "args": ["-y", "@sthan/mcp-server"],
      "env": { "STHAN_API_KEY": "sthan_test_your_key_here" }
    }
  }
}

VS Code (settings.json):

{
  "mcp.servers": {
    "sthan": {
      "command": "npx",
      "args": ["-y", "@sthan/mcp-server"],
      "env": { "STHAN_API_KEY": "sthan_test_your_key_here" }
    }
  }
}

Example prompts

Once configured, just ask your AI assistant naturally:

• "Is 123 Main St, New York, NY 10001 a real, deliverable address?"
• "Parse this address: apt 2b 500 broadway new york ny"
• "What are the coordinates of 1600 Pennsylvania Ave, Washington DC?"
• "What's the nearest address to 40.7128, -74.0060?"
• "Where is IP 8.8.8.8 located?"
• "Suggest US cities starting with 'San Fr'."

Environment variables

Variable	Required	Description
STHAN_API_KEY	Yes	Your sthan.io API key (sthan_test_* for development, sthan_live_* for production)
STHAN_API_URL	No	Override base URL (default: https://api.sthan.io)

Packages

This monorepo publishes two packages:

Package	npm	Purpose
@sthan/mcp-server	npm	The MCP server itself — the binary that your client launches
@sthan/core	npm	TypeScript SDK for direct programmatic use of sthan.io APIs

Development

git clone https://github.com/sthan-io/mcp-server.git
cd mcp-server
npm install
npm run build --workspaces

Then run the server with STHAN_API_KEY=sthan_test_... node packages/mcp-server/dist/index.js.

Links

• Homepage: https://sthan.io
• API docs: https://sthan.io/docs
• OpenAPI spec: https://api.sthan.io/openapi.json
• AI reference (llms-full.txt): https://api.sthan.io/llms-full.txt
• Pricing: https://sthan.io/pricing/united-states
• Support: https://sthan.io/support
• Glama: https://glama.ai/mcp/servers/sthan-io/mcp-server

License

MIT — see LICENSE.