AssessorSearch MCP Server

Query 150M+ U.S. property records directly from your AI assistant.

mcp.assessorsearch.com/mcp
Help me set up the AssessorSearch MCP server in this client.Server URL: https://mcp.assessorsearch.com/mcp (Remote Streamable HTTP)Please walk me through the steps to connect.
Remote Streamable HTTP · OAuth 2.0 PKCE · 6 Built-in Property Tools
Get Pro + API planREST API Docs
Works with your favorite AI tool:
ChatGPT
Claude
Gemini
Grok
Claude Code
Cursor
Example Query

Real property answers in natural language

Ask your AI assistant questions about any U.S. address or parcel. The MCP server resolves the property and returns verified county records directly into your chat.

Chat Example
You

What are the property details, assessed value, and parcel number for 3352 Goldfinch St, San Diego, CA 92103?

mcp.assessorsearch.com → resolve_property(address="3352 Goldfinch St, San Diego, CA 92103")
1 credit charged
AI

Here are the official county assessor records for 3352 Goldfinch St, San Diego, CA 92103:

Property Overview

  • Parcel Number (APN): 451-492-10-00
  • County: San Diego County, CA
  • Property Type: Single Family Residential
  • Building Specs: 3 beds · 2 baths · 1,642 sqft · Built 1952

Valuation & Tax Assessment

  • Total Assessed Value: $509,811 (Land: $318,632 · Impr: $191,179)
  • Annual Property Taxes: $5,735.48 (Tax Year: 2025/2026)
  • Last Recorded Sale: $725,000 (Recorded May 1, 2018)

Would you like me to pull comparable sales, recorded deeds, or building permit history for this property?

Manual Configuration

Direct config files for specific tools

Prefer editing configuration JSON directly? Select your tool below for copy-paste config blocks and step-by-step instructions.

ChatGPT

Web & Desktop
ChatGPT MCP Connector / Chat prompt
Connect to AssessorSearch MCP Server: https://mcp.assessorsearch.com/mcp
Authenticate with my AssessorSearch account (Property Data API plan).
Use this to look up U.S. property records, owners, taxes, parcel numbers, deeds, permits, and comps.

How to connect:

  1. 1Add `https://mcp.assessorsearch.com/mcp` to your ChatGPT MCP connector or custom connector settings.
  2. 2Sign in with your AssessorSearch account during the OAuth authorization step.
  3. 3Ask address or APN questions directly in your ChatGPT conversation.
Tool Catalog

Six dedicated property data tools

Deterministic tools designed for AI agents. Query core assessor records, detailed building specs, deed history, mortgages, permits, and valuation comps.

resolve_property

Resolve Property

1 credit

Matches a street address or APN to a verified parcel and returns the core property record.

Returned fields:
Owner name & mailing addressAPN & county FIPSAssessed value & tax breakdownAnnual tax amountBuilding specs (beds, baths, sqft, year)Last sale date & price
0 credits on miss
get_property_detail

Full Property Details

1 credit

Retrieves complete land characteristics, zoning, and recording metadata by property ID.

Returned fields:
Zoning code & land useLot size & acreageConstruction & roof materialsLegal description & tractSubdivision nameCounty recording timestamps
get_deeds

Deeds & Transfers

3 credits

Retrieves recorded deed transactions, grant documents, and historical transfers.

Returned fields:
Grantor & grantee namesDocument typeRecording dateBook & page / document #Transfer tax & sale amount
Charged only when rows return
get_mortgages

Mortgages & Liens

3 credits

Retrieves open and historical mortgages, institutional lenders, and loan terms.

Returned fields:
Lender nameOriginal loan amountLoan type (Conventional, FHA, VA)Recording date & maturityInterest rate type
Charged only when rows return
get_permits

Building Permits

3 credits

Retrieves municipal building permits, structural alterations, and remodeling filings.

Returned fields:
Permit number & statusWork descriptionFiling & issue datesJob valuation estimateContractor name
Charged only when rows return
get_comparables

Sales Comps

3 credits

Finds recent nearby comparable sales based on distance, property type, and square footage.

Returned fields:
Comparable property addressDistance from subjectRecent sale date & pricePrice per square footSimilarity score
Charged only when rows return
Pricing & Access

Powered by your Property Data API plan

Every MCP query draws from your monthly API credit allowance. Start with the Pro + API plan for starter AI workflows and unlimited web property searches.

One Shared Credit Pool

Your monthly credits work seamlessly across the MCP Server and the REST API. No duplicate subscriptions or separate wallets.

Zero-Risk Queries

Searches that return no match cost 0 credits. Add-on endpoints (deeds, mortgages, permits, comps) only charge when rows exist.

Instant OAuth Activation

Sign in once with your AssessorSearch account. Your AI client authenticates securely via OAuth 2.0 PKCE.

Most popular

Pro + API

Unlimited web views plus starter API access for AI tools and light workflows.

$50/month
Monthly credits
500/month
Overage rate
$0.08/credit
Core lookup
1 credit each
MCP Server
Included

API Growth

Small production integrations, internal review tools, and appraisal QA pilots.

$150/month
Monthly credits
2,000/month
Overage rate
$0.06/credit
Core lookup
1 credit each
MCP Server
Included

API Scale

Higher-volume validation, enrichment, and workflow automation.

$500/month
Monthly credits
10,000/month
Overage rate
$0.04/credit
Core lookup
1 credit each
MCP Server
Included

API Enterprise

Large-volume API access with room for procurement and custom support.

Contact us
Monthly credits
100,000/month
Overage rate
$0.024/credit
Core lookup
1 credit each
MCP Server
Included

Need custom volume or dedicated enterprise support? Contact our team or view our Property Data API docs.

FAQ

Frequently asked questions

Everything you need to know about the MCP server, OAuth authorization, credit rules, and data coverage.

What is the AssessorSearch MCP Server?

The AssessorSearch Model Context Protocol (MCP) server connects AI assistants, IDEs, and autonomous agents directly to 150M+ U.S. property records. Instead of manually browsing county sites or building custom scraping scripts, your AI assistant queries official county assessor and recorder data on demand.

Which AssessorSearch plan do I need?

You need an active Property Data API plan. The Pro + API plan is $50/month and includes 500 monthly credits plus unlimited web searches on assessorsearch.com. Larger teams can choose API Growth (2,000 credits/mo) or API Scale (10,000 credits/mo).

How does authentication work?

The MCP server uses standard OAuth 2.0 with PKCE. When your AI client connects for the first time, it opens a secure browser window to sign in with your AssessorSearch account and approve access. No manual API keys required.

How are credits calculated for MCP lookups?

MCP credits match our transparent API pricing: address and APN searches that do not return a match cost 0 credits. A matched core property record is 1 credit. Add-on endpoints (deeds, mortgages, permits, and comps) are 3 credits each and only charge when real rows are returned.

Can I use both the MCP server and the REST API?

Yes. Both the MCP server and REST API endpoints draw from your account's shared monthly credit pool and respect the same overage budget settings in your dashboard.

What happens if I exceed my monthly credits?

If overages are enabled in your dashboard, queries continue seamlessly at your plan's discounted overage rate (e.g. $0.08/credit on Pro + API) up to your monthly spending cap. If overages are disabled, requests return a clean credit limit notice.

Ready to connect?

Give your AI access to 150M+ property records

Upgrade to the Pro + API plan, add the MCP server to your favorite client in 60 seconds, and start asking real estate questions.

Start Pro + API planExplore Property Data API