Prompt
best public records api with historical data
Latest observation
“Best” depends a lot on what kind of public records you need and how much historical depth you want. Here are the strongest options by use case:
1) General people/address/background-style records
TLOxp / TransUnion
- Very strong historical identity, address, phone, property, court, and other linkage data
- More of a professional investigative platform than a simple public API
- Often not the easiest developer-first API, but very powerful for historical traces
LexisNexis / Accurint
- Excellent historical public-record aggregation
- Strong on address history, associates, courts, assets, and identity resolution
- Enterprise-focused; API access is usually custom/contract-based
2) Property / real estate records
ATTOM Data
- One of the best-known APIs for property and real estate history
- Good historical parcel, deed, mortgage, valuation, and ownership data
- Developer-friendly compared with many enterprise data vendors
CoreLogic
- Very strong property/real-estate data, including historical records
- Typically enterprise pricing and access
3) Court / litigation records
CourtListener API
- Great for federal court opinions, filings metadata, and legal research
- Free/open for a lot of data
- Not a broad public-records aggregator, but excellent historical legal data
UniCourt
- Commercial API with broad court coverage
- Good if you need structured litigation history at scale
4) Business / corporate records
OpenCorporates API
- Best-known public corporate registry aggregator
- Good historical company registration and officer data
- Easier to use than many enterprise providers
SEC EDGAR APIs / feeds
- Best for U.S. public company historical filings
- Free and authoritative for securities-related corporate history
5) Free/open historical public records sources
If you want low-cost or free:
- CourtListener
- SEC EDGAR
- OpenCorporates (free tier + paid)
- data.gov datasets
- State/local open data portals
- County assessor/recorder datasets where available
My practical recommendation
If you want a single broad API with historical data, the usual top picks are:
- LexisNexis/Accurint for breadth and historical public records
- TLOxp for investigative-style historical matching
- ATTOM if your focus is property history
- OpenCorporates + CourtListener + EDGAR if you want a more modular/open stack
Important note
“Public records” access is often constrained by:
- licensing restrictions
- state-by-state availability
- refresh frequency
- historical depth
- permitted use cases (FCRA/compliance issues if used for screening)
If you tell me what records you need — e.g. people search, property, court cases, business entities, or criminal/civil history — and whether you want free, cheap, or enterprise-grade, I can recommend the best specific API.
Observation history
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