Sentinel MCP MCP server

An official MCP server by Sentinel providing Washington state real estate data, including property facts, permit changes, and seller transaction math. It allows AI assistants to run deterministic calculations for REET estimates, seller proceeds, and buyer payments, while returning structured JSON with source attribution and explicit unknowns for four counties.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by Sentinel

MCP endpoint (Streamable HTTP)

https://app.sentineliq.net/api/v1/mcp/public

Vendor documentation

What you can do with it

Estimate Real Estate Excise Tax (REET) for Washington properties
Calculate seller proceeds based on price, concessions, and mortgage payoff
Retrieve property permit history and changes
Generate buyer monthly payment estimates

Tools advertised by the last live check:

wa_reet
wa_net_sheet
nwmls_deadlines

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http sentinel-mcp https://app.sentineliq.net/api/v1/mcp/public

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add sentinel-mcp --url https://app.sentineliq.net/api/v1/mcp/public

Cursor

Merge this server into .cursor/mcp.json in your project, then enable sentinel-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "sentinel-mcp": {
      "url": "https://app.sentineliq.net/api/v1/mcp/public"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "sentinel-mcp": {
      "type": "streamableHttp",
      "url": "https://app.sentineliq.net/api/v1/mcp/public",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start sentinel-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "sentinel-mcp": {
      "type": "http",
      "url": "https://app.sentineliq.net/api/v1/mcp/public"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http sentinel-mcp https://app.sentineliq.net/api/v1/mcp/public

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "sentinel-mcp": {
      "url": "https://app.sentineliq.net/api/v1/mcp/public"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "sentinel-mcp": {
      "serverUrl": "https://app.sentineliq.net/api/v1/mcp/public"
    }
  }
}

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