OffMarketAPI — probate & pre-foreclosure data API + MCP

Q: Can ChatGPT or Claude use it?

Yes. It is an MCP server, so Claude and ChatGPT connect with a single URL and query it in natural language. There is also a plain REST endpoint for any agent or cron job.

Connect in three lines

# Claude Desktop / claude.ai → Settings → Connectors → Add custom connector
Name:  OffMarketAPI
URL:   https://mcp.offmarketapi.com/mcp
# paste the URL, authorize with your API key, done.

// ChatGPT → Settings → Connectors → Developer mode → Add
{
  "name": "offmarketapi",
  "server_url": "https://mcp.offmarketapi.com/mcp",
  "authorization": "Bearer $OMA_KEY"
}

curl -H "Authorization: Bearer $KEY" \
  "https://api.offmarketapi.com/v0/distressed?county=hillsborough-fl&signal=probate&since=2026-07-12"

Tools exposed (MCP + REST)

tools exposed — mcp + rest

search_distressedfilter by county, signal[], value, equity, absentee, since

get_propertyparcel detail: owner, assessed value, liens, last deed

daily_diffeverything new since your last pull — built for cron agents

get_caseprobate / foreclosure case metadata + parties

Every record carries source, filed_date, and first_seen_at. If we haven't synced a county in 24 hours, the API tells you so. Agents can't reason over data that lies about its age.

GET /v0/distressed?county=hillsborough-fl&signal=probate — sample record

{
  "case_id": "fl-hillsborough-26CP00xx41",
  "signal": "probate",
  "source": "hillsborough_clerk_probate_docket",
  "filed_date": "2026-07-11",
  "first_seen_at": "2026-07-12T04:12:09Z",
  "delayed": false,
  "decedent": "HALVORSEN, ██████ R",
  "personal_rep": "HALVORSEN, ██████ (son)",
  "property": {
    "parcel_id": "A-██-29-18-ZZZ-000█",
    "address": "4██7 W BALLAST POINT BLVD, TAMPA FL 33611",
    "assessed_value": 412300,
    "est_mortgage": 71000,
    "homestead": true,
    "year_built": 1958,
    "owner_mailing_state": "OH",
    "absentee": true
  },
  "match_confidence": 0.94
}

County records are public, fresh, and utterly hostile to software. Portals from 1998, per-county quirks, nightly batch windows. We do the ugly part — the reading — so your agent can do the smart part. Built for the person automating their acquisitions, by someone who automates hostile systems for a living.

Pricing

FREE$050 queries/mo · 1 county · DATA ON 7-DAY DELAY · community support

BUILDER$99/mo5k queries · 3 counties · last night's sync · webhooks

FOUNDING$199/mo25k queries · all covered counties · daily_diff · direct line

AGENCYusagevolume pricing · white-label feeds · email us

Founding tier locked for life. Counties expand monthly; founding members pick what's next.

Free tier serves data on a 7-day delay. Every free response carries "delayed": true and week-old records — enough to build and demo against, not enough to beat anyone to a deal. The entire product is freshness, so the delay is the paywall. If the delay doesn't bother you, you don't need us.

Get an API key

Request a founding key

FAQ

What is OffMarketAPI?

OffMarketAPI is a REST API and MCP server that serves off-market real estate distress signals — probate filings, pre-foreclosures, tax delinquencies, and code violations — read nightly from county records and matched to parcels.

Is there an API for probate leads or pre-foreclosure data?

Yes — OffMarketAPI serves probate filings and pre-foreclosure notices as REST and MCP, refreshed nightly from county records.

How is this different from Zillow MCP servers?

Zillow MCP servers serve listings — properties already on the market. OffMarketAPI serves distress signals before a listing exists.

Can ChatGPT or Claude use it?

Yes. It's an MCP server, so Claude and ChatGPT connect with a single URL and query it in natural language. There's also a plain REST endpoint for any agent or cron job.

Where does the data come from?

County probate court dockets, recorders of deeds, tax rolls, and code-enforcement records — all public records, read nightly. Every record carries its source and timestamps.

What counties do you cover?

Hillsborough County, FL is live now. Tarrant County, TX is coming next — request a key to join the waitlist. Founding members vote on what's added after that.