io.github.cyanheads/nominatim-mcp-server

io.github.cyanheads/nominatim-mcp-server·v0.1.8·Maps & Location

Geocode, reverse geocode, and run Overpass spatial queries on OpenStreetMap data.

In-path gate · all MCP tools

Using io.github.cyanheads/nominatim-mcp-server in Claude, Cursor, Gemini CLI, Cline, or Zed?

MCP tool contracts can change remotely with no version bump. The mcpindex gate pins each contract and HOLDs the call when it drifts—before your agent acts. Zero credentials. This is not the package install for this server itself (use Install this server for that).

Install the mcpindex gate (one command)

Rewrites your MCP host config so each server launches behind the gate. Inspect first: curl -fsSL https://mcpindex.ai/install.sh | less

curl -fsSL https://mcpindex.ai/install.sh | sh

Auditable install path →Watch it hold a drift →

Trust verdict · v1 advisory · method

REVIEWstatus: PARTIALfresh until 2026-08-05 19:01 UTC

screened 2026-07-06tier: scannedgranularity: description-levelsource: registry

Semantic screen found no manipulation pattern in the description. Conformance probe not yet run.

mcpindex.integrity.descriptionpassINFO

evidence“Declared capabilities, no hidden instructions”via static_description

Limits of this verdict

- Semantic screen only - the deterministic conformance probe has not run on this server
- Confidence is reported but not yet calibrated (v1)
- Screen reads the tool description, not the live behavior
- advisory
- registry description only no input schema
- screen model 8b

Semantic screen: an LLM judge reads the tool description for hidden instructions (status PARTIAL). A pass means the description is not lying, not that the tool is safe: a high-capability tool with an honest description still warrants caution. The deterministic conformance probe has not been run on this server yet, so the screen here is semantic-only. Posture: advisory. Confidences are reported but not yet calibrated (calibrated=false at v1). Full verdict history is not shown on this page.

Own this server? Screen its description →

Embed this badge

A live verdict badge for your README or listing. It reflects the current screen, links back here, and updates when the verdict does.

Markdown

[![mcpindex](https://mcpindex.ai/api/v1/badge/io-github-cyanheads-nominatim-mcp-server)](https://mcpindex.ai/server/io-github-cyanheads-nominatim-mcp-server)

HTML

<a href="https://mcpindex.ai/server/io-github-cyanheads-nominatim-mcp-server"><img src="https://mcpindex.ai/api/v1/badge/io-github-cyanheads-nominatim-mcp-server" alt="mcpindex verdict" height="20" /></a>

Environment variables

NOMINATIM_BASE_URL

Nominatim API base URL. Override to use a private or mirror instance.

NOMINATIM_USER_AGENT

User-Agent sent to Nominatim and Overpass. Required by usage policy.

OVERPASS_BASE_URL

Overpass API endpoint URL. Override to use a mirror or private instance.

MCP_LOG_LEVEL

Sets the minimum log level for output (e.g., 'debug', 'info', 'warn').

MCP_HTTP_HOST

The hostname for the HTTP server.

MCP_HTTP_PORT

The port to run the HTTP server on.

MCP_HTTP_ENDPOINT_PATH

The endpoint path for the MCP server.

MCP_PUBLIC_URL

Public origin override for deployments behind a TLS-terminating reverse proxy (e.g. https://mcp.example.com).

MCP_AUTH_MODE

Authentication mode to use: 'none', 'jwt', or 'oauth'.

NOMINATIM_BASE_URL

Nominatim API base URL. Override to use a private or mirror instance.

NOMINATIM_USER_AGENT

User-Agent sent to Nominatim and Overpass. Required by usage policy.

OVERPASS_BASE_URL

Overpass API endpoint URL. Override to use a mirror or private instance.

MCP_LOG_LEVEL

Sets the minimum log level for output (e.g., 'debug', 'info', 'warn').

MCP quality score · maturity, not trust · methodology

freshness

completeness

installability

documentation

stability

Alternatives in Maps & Location

BittleBits GEO Assistant

ai.bittlebits/bittlebits

GEO scores and content-rewrite suggestions for any web page, as MCP tools.

ai.factori/mcp

Real-world location intelligence: foot traffic, trade areas, demographics, site scoring, and more.

ai.geodesiclabs/governance-platform

Deterministic AI governance platform. Validates agent outputs, discovers patterns, solves math.

Install this server

Remote endpoint

Streamable HTTP / SSE endpoint. Add to any MCP client that supports remote servers.

https://nominatim.caseyjhand.com/mcp

Claude Desktop (claude_desktop_config.json)

{
  "mcpServers": {
    "nominatim-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/nominatim-mcp-server"
      ],
      "env": {
        "NOMINATIM_BASE_URL": "https://nominatim.openstreetmap.org",
        "NOMINATIM_USER_AGENT": "nominatim-mcp-server/0.1.8",
        "OVERPASS_BASE_URL": "https://overpass-api.de/api/interpreter",
        "MCP_LOG_LEVEL": "info",
        "MCP_HTTP_HOST": "127.0.0.1",
        "MCP_HTTP_PORT": "3010",
        "MCP_HTTP_ENDPOINT_PATH": "/mcp",
        "MCP_PUBLIC_URL": "<mcp_public_url>",
        "MCP_AUTH_MODE": "none"
      }
    }
  }
}

Cursor (.cursor/mcp.json)

{
  "mcpServers": {
    "nominatim-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/nominatim-mcp-server"
      ],
      "env": {
        "NOMINATIM_BASE_URL": "https://nominatim.openstreetmap.org",
        "NOMINATIM_USER_AGENT": "nominatim-mcp-server/0.1.8",
        "OVERPASS_BASE_URL": "https://overpass-api.de/api/interpreter",
        "MCP_LOG_LEVEL": "info",
        "MCP_HTTP_HOST": "127.0.0.1",
        "MCP_HTTP_PORT": "3010",
        "MCP_HTTP_ENDPOINT_PATH": "/mcp",
        "MCP_PUBLIC_URL": "<mcp_public_url>",
        "MCP_AUTH_MODE": "none"
      }
    }
  }
}

Cline (cline_mcp_settings.json)

npx -y @cyanheads/nominatim-mcp-server

Claude Code (claude mcp add)

claude mcp add --scope user nominatim-mcp-server -- npx -y @cyanheads/nominatim-mcp-server

Gemini CLI (gemini mcp add)

gemini mcp add -s user nominatim-mcp-server npx -y @cyanheads/nominatim-mcp-server

Verdict API

curl -s mcpindex.ai/api/v1/trust/server/io-github-cyanheads-nominatim-mcp-server

Free-tier verdict as JSON: decision + dimensions + severity. Call it from your agent before it invokes a tool it just discovered.

Details

version: v0.1.8
category: Maps & Location
verdict expires: 2026-08-05
quality: 79 / 100
operator: cyanheads

Provenance

Verdict history is anchored to Bitcoin via OpenTimestamps. The anchor proof is public and any skeptic can recompute it offline.

Links

Repository →Remote endpoint →