# API Release - v4.5.0 > Documentation chatbot, MarketMatch API, NeoVIN options packages endpoint, webhook and quota alert setup, UK compliance fields, status code based billing, and legacy parameter deprecations. - **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]](https://docs.marketcheck.com/docs) --- ### 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]](https://docs.marketcheck.com/docs/api/cars/market-insights/marketmatch) --- ### 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]](https://docs.marketcheck.com/docs/api/cars/vehicle-specs/available-options) --- ### 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]](https://docs.marketcheck.com/docs/get-started/api/webhook-integration) --- ### 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]](https://docs.marketcheck.com/docs/get-started/api/quota-and-rate-limits#api-monitoring) ## 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`