AI grounding layer for real estate
Property data
you can verify.
Research a property, ask questions, and inspect the records behind the answer. Live in Washington, D.C.
$50 in starting credit.No credit card required.
What you get
Answers you can check.
Records you can cite.
Records you can inspect
Read property records and their source references, with the context needed to understand what each record says.
Answers with citations
Ask about a property in plain language, then follow the citation to the record behind the answer.
Research in your workflow
Use Quoin Work, or ask us about connecting records to a compatible AI assistant through MCP.
Source context preserved
Review the origin, date, and reference before using a record in your research or citing it in a memo.
How it works
From property to source.
Interactive illustration. Fictional property and records.
Start with the property
Enter an address. Quoin returns available records for that parcel, from the agencies that issued them.
> 1400 Alder St NW (illustrative) 5 records found Sales & ownership Tax & assessments Permits & licenses Zoning & land use Property characteristics Each opens to its own source.
Coverage
Built for the U.S.
Live in D.C.
Washington, D.C. is available today. The North East U.S. is releasing soon, with the South East U.S. next in line.
- Washington, D.C.
- Available now
- North East U.S.
- Releasing soon...
- South East U.S.
- Next in line...
- Your Market
- By request
Record types
Five categories of property records.
Quoin collects direct from agencies of record. Available records and fields vary by property and market.
Sales & ownership
Recorded transfers and ownership history
Tax & assessments
Assessed values and tax history
Permits & licenses
Building permits, trade licenses, and certificates of occupancy
Zoning & land use
Zoning districts, overlays, conditions, and parcel details
Property characteristics
Year built and building details
Provenance
Trust is something you check.
Review the origin, date, and reference attached to a record before making a decision.
Named origin
See which agency issued the record and where it came from.
Records kept distinct
Review individual records with their own context, rather than a blended value.
Open to inspection
Follow a citation to the underlying record and the passage supporting the answer.
Limits stated
Check what the record leaves unresolved. An issued permit does not establish that work is complete.
For developers
Bring records into your workflow.
Connect property research to your assistant or product, with source references alongside the records.
MCP connector
Model Context Protocol (MCP) connects data tools to compatible AI clients. Client support and setup requirements vary.
The public setup guide is not yet published.
Ask about MCP setupAPI access
Use the record layer in your own product. Contact us for access details, supported requests, and source-reference formats.
Public API documentation is coming soon.
Ask about API accessAnatomy of a record
Read the record and its limits.
Illustrative examples. Property, agencies, and records are fictional.
Final inspection: not included in the available record.
Permit record
Issued Mar 28, 2025
Example Building Department
What it leaves unresolved
Issued is not finished
Usage-based.
No subscription.
$50 in credit to start. No credit card, no per-seat fees, no minimum. Pay only for the work you actually do.
Choose how you access Quoin. Usage rates are not published here. Ask for current rates and billing details.
Quoin Work
For professionals researching a property
- Property research workspace
- Conversational AI over the records
- Source inspection on every answer
- Access to all five record categories
MCP connector
For teams using a compatible AI assistant
- Quoin records inside your assistant
- Source citation in every answer
- For compatible MCP clients
- Same records as the workspace
API
For products that need property data
- Direct access to the record layer
- Source reference on every response
- Access to all five record categories
- Usage-based, no minimum
- Documentation coming soon
Every account starts with $50 in credit and no credit card. Questions about volume, or a market we don't cover yet? info@quoindata.com
Start with the property.
Follow the evidence.
Open Quoin Work to research a Washington, D.C. property and inspect the records behind the answer.