# Changelog

> New endpoints, fields and documentation changes across every Constellation Data Labs API, newest first.

Source: https://docs.cdatalabs.com/changelog/  
Last updated: 2026-11-11

## November 2026

Nov 11, 2026[Listings API](../index.html)

### Data Dictionary 2.1 is now the default Listings reference

The Listings API docs now describe RESO Data Dictionary 2.1. The Data Dictionary 1.7 reference stays available for existing integrations, and the Version menu switches between them on the same section.

[Read the docs](../listings/index.html)

Nov 11, 2026[Listings API](../index.html)

### Clearer token caching rules

The Authentication section now explains that API Gateway caches the authorization result for one hour, so re-authenticating within that hour returns the same token and does not reset its 24 hour expiry.

[Read the docs](../listings/index.html#Authentication)

## October 2026

Oct 21, 2026[Property Data · OData](../insights/index.html)

### Delete History endpoints

New endpoints list records removed from the Assessor, Deed, Mortgage, Assignment, Release, Pre-Foreclosure, Base Properties, Mortgage Property Aggregate, Sales and Transfer, and Loan data sets, with a dictionary for each.

[Read the docs](../insights/delete-history.html)

## September 2026

Sep 29, 2026[Property Data · GraphQL](../graphql/index.html)

### History expansions on base properties

Base property queries can now expand historicalEstimate, taxHistory, salesAndTransferHistory and mortgageHistory.

[Read the docs](../graphql/index.html)

Sep 29, 2026[Property Data · OData](../insights/index.html)

### Delete and flat file details

The Property Data docs now cover how deletes are delivered and what the flat file exports contain.

[Read the docs](../insights/index.html#FlatFiles)

Sep 10, 2026[Property Data · OData](../insights/index.html)

### Points of Interest and Transit Data removed

The Points of Interest and Transit Data sections were removed from the Property Data documentation.

[Read the docs](../insights/index.html)

## August 2026

Aug 31, 2026[Property Data · GraphQL](../graphql/index.html)

### Polygon search

Pass a top-level polygon with a WKT POLYGON string of longitude and latitude pairs to return properties that intersect the shape.

[Read the docs](../graphql/index.html)

Aug 11, 2026[MCP](../mcp/index.html)

### Connect an AI client over MCP

New guide for pointing Claude, ChatGPT, Cursor and automation tools at the BaseProperties and Listings MCP servers, using the client ID and secret you already have.

[Read the docs](../mcp/index.html)

## July 2026

Jul 14, 2026[Property Data · OData](../insights/index.html)

### Authorization header required on every request

The API is stateless. Requests without an Authorization: Bearer header are rejected with 401 Unauthorized, even after earlier successful calls.

[Read the docs](../insights/index.html#Authentication)

## June 2026

Jun 9, 2026[Listings API](../index.html)

### request-trace-id header required for media

All media requests must include a request-trace-id header set to your client ID.

[Read the docs](../listings/index.html#Images)

## May 2026

May 8, 2026[Property Data · GraphQL](../graphql/index.html)

### Census geography on base properties

Base property queries can now return census administrative geography such as county or parish.

[Read the docs](../graphql/index.html)

## April 2026

Apr 29, 2026[Property Data · GraphQL](../graphql/index.html)

### Schools, school districts and RESO listings in GraphQL

The Property Data API (GraphQL) now documents resoProperties, schools and school districts alongside base properties.

[Read the docs](../graphql/index.html)

Apr 9, 2026[Property Data · OData](../insights/index.html)

### Mortgage Property Aggregate

A new Mortgage Property Aggregate entity and dictionary, with its own delete history.

[Read the docs](../insights/mortgagepropertyaggregate.html)