For Professionals

Tax-sale intelligence for platforms, investors and research teams

Structured access to 51 jurisdiction profiles, county competition scores and 299,674 published tax lien, tax deed and foreclosure parcels — live today, not a waitlist.

GET /api/v1/states

Statutory return, redemption period, bid method and the TaxLienSimple Index score for all 51 jurisdictions. Public.

GET /api/v1/counties

County-level competition band and inventory counts — no owner PII. Public.

GET /api/v1/parcels

Parcel-level data, JSON or CSV. Requires an API key — no owner-contact fields exposed.

Example — GET /api/v1/states (one row from the response)

{
  "state": "Illinois",
  "slug": "illinois",
  "system": "lien",
  "investor_accessible": true,
  "max_rate": "9% max penalty bid per 6-month period (P.A. 102-363, eff. 1-1-2022)",
  "redemption_period": "36mo (3yr) default, 1yr vacant/commercial",
  "auction_format": "Scavenger sale",
  "statute_citation": "35 ILCS 200/21-215",
  "official_source_url": "https://ilga.gov/documents/legislation/ilcs/documents/003502000K21-215.htm",
  "tls_index_score": 48,
  "verified": true
}

Example — GET /api/v1/counties?state=Texas (one row)

{
  "state": "Texas",
  "county": "Travis",
  "competition_score": 64.4,
  "competition_band": "High",
  "online_auctions": true,
  "parcels": 4,
  "lien_share": 0
}

Both are exact response shapes from the live endpoints, not illustrative. Full parameters and every field are documented on the developer docs page.

Who it's for

Auction platforms

Enrich your own listings with statutory terms and competition context.

Title companies

Pull structured parcel and jurisdiction data into your own workflow.

Newsletters & researchers

Cite verified, source-linked figures instead of re-typing state tables.

Investment teams

Bulk pull inventory across counties without scraping.

Data providers

License structured tax-sale data instead of building your own pipeline.

Developers

REST, JSON, CSV. Full docs and rate limits below.

Get access

/api/v1/states and /api/v1/counties are public today. Keyed access to /api/v1/parcels (JSON/CSV, rate-limited) is included on the Unlimited plan — generate a key from your account once subscribed.

Read the full API docs See plans

Bulk Downloads

Take the whole dataset, not just what the API returns per request

The /api/v1/parcels endpoint is capped at 500 rows per request for normal keyed use. Bulk Downloads is the alternative for teams that need the full 299,674-parcel inventory, or a full state or county slice of it, in one file instead of paginated calls.

Full inventory export

Every published parcel across all 51 jurisdictions, one CSV or NDJSON file, refreshed daily.

Scoped export

One state or a named list of counties — useful for a title company or platform that only operates in a few markets.

Delivery

Signed download link today; SFTP or S3 drop-off for recurring bulk pulls is available on request.

Per-county CSV exports are already live and free to any signed-in Pro/Unlimited account from Property Lists. Full-dataset and multi-county bulk exports are an Unlimited-plan add-on — email below to set one up.

Data Licensing

License the underlying dataset for your own product

Some teams don't want live API calls — they want to ingest the data once and run it inside their own product, warehouse, or client deliverable. Licensing covers that use case: a defined snapshot or refresh cadence, cleared for redistribution inside your application, report, or internal tooling.

What's licensable

State statutory terms and TLS Index scores, county competition data, and parcel-level auction inventory — the same fields the API and the free 51-state dataset expose, at a larger scope and refresh rate.

What it's not

No owner names, phone numbers, or contact PII are included in any license — that data is only ever surfaced inside the product to a signed-in Unlimited user researching a specific property.

Pricing depends on scope (states/counties covered), refresh frequency, and redistribution rights. Tell us your use case and we'll send terms.

County & Vendor Solutions

For county offices, auction platforms, and tax-sale service vendors

TaxLienSimple already sources published auction and parcel data from county and state systems. Counties, auction-platform operators (e.g. RealAuction, Bid4Assets, GovEase-style vendors) and tax-sale service providers can work with us directly on two things:

Correction & verification pipeline

If your office publishes the sale list we source from, you can flag corrections directly — we already run a public corrections log and prioritize fixes reported by the administering authority.

Distribution partnership

Feed your platform's listings into TaxLienSimple's directory, or pull our verified statutory/competition data into your own bidder-facing tools via the API or a bulk feed above.

This is a direct-contact relationship, not a self-serve signup — email us and we'll set up a call.

Email data@taxliensimple.com