SENTINEL Washington Real Estate MCP server

SENTINEL Washington Real Estate MCP

Source-dated Washington property evidence and transaction math for software and compatible AI assistants. One REST and MCP service combines supported county facts, permit and site context, REET, seller calculations and bounded research packets. It complements licensed MLS data; it does not replace an MLS feed.

Developer guide · Console · OpenAPI · Developer terms

Try without an account

curl -s https://app.sentineliq.net/api/v1/public/reet \
  -H 'Content-Type: application/json' \
  -d '{"sale_price":750000,"county":"king"}'

Worked example: $8,655 state REET + $3,750 county-level local REET + $5 technology fee = $12,410 estimated total. The full response includes the tax bands, scope, assumptions, disclaimer and attribution. This is an estimate for a standard residential transfer; verify the location code and applicable rules.

Tools

The three public REST calculators use /api/v1/public/ instead. Tools do not create deals, change CRM records or send messages. Successful keyed calls update the account's usage ledger.

REST field names use snake_case. MCP arguments use camelCase; inspect tools/list for the exact schema. MCP output retains the REST response's field names.

Connect

Public URL: https://app.sentineliq.net/api/v1/mcp/public Keyed URL: https://app.sentineliq.net/api/v1/mcp

The public connection exposes three calculators. The keyed connection exposes all fourteen tools. Configure Authorization: Bearer agk_... using your client's protected credential settings. There is no OAuth sign-in flow. Keys belong on a server or in secure local configuration, never shared source files.

Cursor

Use .cursor/mcp.json:

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

VS Code

Use .vscode/mcp.json. VS Code uses servers and an explicit transport type:

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

Claude Code

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

Other clients must support a remote HTTP MCP server. Availability and protected header configuration vary by client and plan. No universal compatibility claim is made. The optional Claude Desktop example uses a third-party stdio bridge; review that dependency before using it.

Protocol behavior

Server version: 1.5.1. Supported protocol revisions are 2026-07-28, 2025-06-18 and 2025-03-26. Transport is stateless HTTP POST with JSON responses; a legacy HTTP+SSE server is not provided.

Shortened. The full README is on GitHub.