API Release - v4.5.0

4.5.0·Jan 12, 2026

• New features: Chatbot Integration for Marketcheck Documentation Portal, Marketmatch API, Available Options Packages Endpoint (NeoVIN), API Webhook Setup, API Usage Quota Alerts Setup
• Optimizations: Rate Limit Enhancement for Standard Subscription, MSA-Level Search Support (Dealer & Dealership APIs), Incentives API – Photo Links Parameter, UK APIs – New Compliance Fields, FSBO & Auction Inventory Filtering Enhancements, Dealership Inventory Syndication – Row Limit Enforcement, UK Search API – Dealer Name Filtering, Status Code–Based API Billing, Comprehensive API Documentation Updates
• Other changes: Deprecation of Legacy Request Parameters and Response Fields, Sunset Timeline and Client Impact
• Bug fixes: Dealerships API – Error Handling Improvements

New features

1. Chatbot Integration for Marketcheck Documentation Portal

Description:

• Launched an AI-powered conversational chatbot integrated into the Marketcheck documentation portal.
• Enables developers to get instant answers, guided integration help, and quick access to relevant API documentation.
• Improves onboarding experience, reduces documentation lookup time, and enhances overall developer productivity.
• Documentation: [Marketcheck API Chatbot]

2. Marketmatch API

Description:

• Introduced the Marketmatch API to provide advanced dealer and vehicle (VIN) ranking analytics.
• Supports data-driven market analysis and informed decision-making using pricing, demand, inventory mix, and location signals.
• Includes dealer ranking and vehicle ranking endpoints for comparative analysis.
• Pricing: $0.35 per API call
• Documentation: [Marketmatch API Documentation]

3. Available Options Packages Endpoint (NeoVIN)

Description:

• Introduced a new endpoint to retrieve all manufacturer option packages for a vehicle using VIN.
• Returns option codes, package names, and MSRP details to support accurate valuation and pricing strategies.
• Endpoint: /v2/decode/car/neovin/{vin}/options-packages
• Pricing: $0.02 per API call
• Documentation: [Available Options Packages API Documentation]

4. API Webhook Setup

Description:

• Launched a self-service webhook configuration interface in the Marketcheck Universe Portal.
• Allows clients to configure, manage, and monitor webhook endpoints for real-time API and data feed updates.
• Improves event-driven integrations and near real-time data consumption.
• Documentation: [Webhook Setup Documentation]

5. API Usage Quota Alerts Setup

Description:

• Introduced configurable API usage quota alerts in the Marketcheck Universe Portal.
• Enables clients to monitor usage, set custom alert thresholds, and receive email notifications.
• Helps prevent unexpected quota overruns and improves usage transparency.
• Documentation: [API Usage Alerts Documentation]

Optimizations

6. Rate Limit Enhancement for Standard Subscription

Description:

• Increased pagination rate limits for Standard subscription plans from 20 to 40 requests per second.
• Improves performance and throughput for higher-volume pagination use cases.

7. MSA-Level Search Support (Dealer & Dealership APIs)

Description:

• Added support for msa_code filtering in Dealer and Dealership Search APIs.
• Enables metro-area–level filtering for improved geographic targeting and analytics use cases.

8. Incentives API – Photo Links Parameter

Description:

• Added the photo_links parameter to the Incentives API.
• Allows retrieval of incentive listings that include associated vehicle images.
• Enhances data richness and downstream presentation use cases.

9. UK APIs – New Compliance Fields

Description:

• Added new response fields to UK-based endpoints:
• fca_status
• fca_reference_number
• is_ulez_compliant
• Improves regulatory compliance visibility and accuracy of UK vehicle data.

10. FSBO & Auction Inventory Filtering Enhancements

Description:

• Enhanced FSBO and Auction inventory APIs to support filtering by source and dealer_id.
• Added facet and stats support on dealer and source fields.
• Enables more precise and targeted inventory discovery.

11. Dealership Inventory Syndication – Row Limit Enforcement

Description:

• Enforced row limits on the Dealership Inventory Syndication API.
• Free plan requests are limited to 10 listings per response.
• Improves platform stability and ensures controlled data access.

12. UK Search API – Dealer Name Filtering

Description:

• Enabled dealer_name filtering in UK Search APIs.
• Allows clients to refine search results by seller name for more relevant inventory queries.

13. Status Code–Based API Billing

Description:

• Enhanced billing logic to charge API usage only for successful or meaningful responses.
• Requests returning error or throttling status codes (400, 401, 403, 404, 405, 422, 429, 500) are excluded from billing.
• Improves billing transparency and reduces disputes.

14. Comprehensive API Documentation Updates

Description:

• Updated and corrected API documentation across US and UK History and Listings APIs.
• Ensures documentation accurately reflects current fields, data structures, and behavior.
• Reduces integration errors and ongoing support overhead.

Other changes

Deprecation of Legacy Request Parameters and Response Fields

Description:

• Deprecated multiple unused request parameters and response fields across Marketcheck Search, Inventory, and MDS APIs.
• These changes are intended to streamline API responses, improve consistency, and reduce reliance on legacy attributes.
• Deprecation warnings may be included in API responses to encourage early migration.

Deprecation Effective Date: 26 Nov 2025

Deprecated Request Parameters

• lease_term
• trim_r
• lease_down_payment
• lease_emp
• finance_down_payment
• finance_down_payment_per
• finance_emp
• availability_status

Deprecated Response Fields

• model_code – appears in listing response objects
• loan_term – appears in financing_options
• loan_apr – appears in financing_options
• listing_type – appears in listing response objects

Affected Endpoints

• /v2/search/car/active
• /v2/search/car/fsbo/active
• /v2/search/car/auction/active
• /v2/search/car/recents
• /v2/search/car/uk/recents
• /v2/car/dealer/inventory/active
• /v2/mds/car
• /v2/search/rv/uk/active (availability_status only)

Sunset Timeline and Client Impact

Description:

• Deprecated parameters and fields are scheduled to be fully removed after the sunset date.
• Continued usage beyond the sunset date may result in ignored fields or breaking changes.
• Early migration is strongly recommended to ensure uninterrupted compatibility with current and future Marketcheck API releases.

Sunset Effective Date: 10 Aug 2026

Bug fixes

15. Dealerships API – Error Handling Improvements

Description:

• Improved error handling in the Dealerships API by standardizing responses for invalid or incorrect request parameters.
• Provides clearer, more consistent error messages for client integrations.
• Affected Endpoint: /v2/dealerships/car