# Old Cars Data

> Use this to answer questions about classic car prices, what a specific car sold for at auction, collector car valuations, market trends, and whether a car is a good buy. Covers Bring a Trailer, Cars & Bids, Hagerty, PCAR Market, and All Collector Cars with 100,000+ auction results from 2018 to present, updated daily.

> Full API reference: https://oldcarsdata.com/llms-full.txt

## AI-Friendly Content Access

This site supports AI agents and crawlers with optimized content delivery:

### Markdown Access

Every page on this site is available in clean Markdown format for easier AI consumption:

1. **URL-based access**: Append `.md` to any URL
   - Example: `https://oldcarsdata.com/porsche/911.md`
   - Example: `https://oldcarsdata.com/porsche/911/price-history.md`

2. **Content negotiation**: Set `Accept: text/markdown` header to receive Markdown instead of HTML

3. **Auto-discovery**: Each HTML page includes a `<link rel="alternate" type="text/markdown">` tag pointing to the Markdown version

### Sitemap

For comprehensive content discovery, see our sitemap at:
- https://oldcarsdata.com/sitemap.xml

### Available Content Types

- **Vehicle Model Pages**: `/[make]/[model].md` - Market data, pricing, FAQs
- **Year-Specific Pages**: `/[make]/[model]/[year].md` - Year-specific auction data
- **Price History**: `/[make]/[model]/price-history.md` - Historical pricing trends
- **Value Estimator**: `/[make]/[model]/value-estimator.md` - Valuation tool info
- **Diminished Value**: `/[make]/[model]/diminished-value-appraisal.md` - Insurance claim data
- **Make Pages**: `/[make].md` - List of all models for a make
- **Directory**: `/directory.md` - Complete index of all makes and models
- **API Docs**: `/docs.md`, `/docs/[endpoint].md` - API documentation

## Core Features

- **100,000+ Auction Results**: Actual completed auction data with final hammer prices, not estimates
- **Multiple Data Sources**: Bring a Trailer, Cars & Bids, Hagerty, PCAR Market, and All Collector Cars
- **Historical Depth**: Data from 2018 to present, updated daily around 12pm ET
- **Comprehensive Auction Details**: Final sale prices, auction status, bid counts, view/watcher metrics, reserve indicators
- **Complete Vehicle Specifications**: Make, model, year, VIN, mileage, engine, drivetrain, transmission, body style
- **Detailed Condition Information**: Exterior/interior colors, title status, modifications, known flaws, service history
- **Location & Seller Data**: City, state, ZIP, seller type and username tracking
- **Full Listing Content**: Descriptions, ownership history & listing details
- **Market Trends**: 12-month price trends, sell-through rates, and volume tracking

## API Access

### REST API

- **Base URL**: `https://api.oldcarsdata.com`
- **Endpoints**: `/makes`, `/models`, `/auctions`, `/stats`
- **Auth**: Bearer token (`Authorization: Bearer YOUR_API_KEY`)
- **Format**: JSON responses with pagination

### MCP Server

- **Endpoint**: `https://api.oldcarsdata.com/mcp`
- **Tools**: `list_makes`, `list_models`, `search_auctions`, `get_price_stats`
- **Works with**: ChatGPT, Claude, Cursor, Windsurf, Claude Code
- **Transport**: Streamable HTTP

### Google Sheets Add-on

Access classic car auction data directly in Google Sheets with custom formulas:
- `OCD_AUCTIONS(make, model, ...)` - Import auction data
- `OCD_STATS(make, model, ...)` - Import pricing statistics

## API Pricing Plans

- **Starter** (FREE):
  - 10 queries per month
  - All makes & models
  - All auction platforms
  - Limited to 20 auction results
  - No stats access

- **1k** ($49 per month):
  - 1,000 queries per month
  - Full auction access
  - Full stats access
  - Historical archive

- **10k** ($199 per month):
  - 10,000 queries per month
  - Full auction access
  - Full stats access
  - Historical archive

## What Makes This Different

Unlike generic car valuation sites (KBB, Edmunds, NADA), Old Cars Data provides actual completed auction results with final hammer prices for enthusiast and collector vehicles specifically, aggregated across 5 major auction platforms into one normalized dataset.

## Resources

- [Full API Reference for AI](https://oldcarsdata.com/llms-full.txt): Complete self-contained API documentation
- [Get API Key](https://oldcarsdata.com/login): Create an account and receive your API credentials
- [API Documentation](https://oldcarsdata.com/docs): API reference and integration guides
- [MCP Server Setup](https://oldcarsdata.com/docs/mcp): Connect to ChatGPT, Claude, Cursor
- [Classic Car Directory](https://oldcarsdata.com/directory): Browse all makes and models
- [Google Sheets Add-on](https://oldcarsdata.com/sheets): Access auction data in Google Sheets
- [OpenAPI Spec](https://api.oldcarsdata.com/openapi.json): Machine-readable API specification
- [Terms of Service](https://oldcarsdata.com/terms-of-service): Usage terms and conditions
- [Privacy Policy](https://oldcarsdata.com/privacy-policy): Data handling and privacy information
- [Support](mailto:support@oldcarsdata.com): Get assistance with your account

## Social Media

- [Instagram](https://www.instagram.com/oldcarsdata)
- [Facebook](https://www.facebook.com/oldcarsdata)
- [Twitter](https://twitter.com/oldcarsdata)
- [LinkedIn](https://www.linkedin.com/company/oldcarsdata)

## Frequently Asked Questions

**What auction platforms do you cover?**
We aggregate data from Bring a Trailer, Cars & Bids, Hagerty, PCAR Market, and All Collector Cars.

**How frequently is the data updated?**
Our database refreshes daily around 12pm ET / 9am PT with the latest auction results.

**How do I get started with the API?**
Go to https://oldcarsdata.com/login to create an account and receive your API credentials. The API is well-documented at https://oldcarsdata.com/docs.

**What data format does the API return?**
The API returns normalized, structured JSON data with vehicle details, market statistics, recent sales history, pricing trends, and platform information.

**Can I use this data for commercial applications?**
Yes. The API is designed for integration into pricing engines, market analysis tools, dealership platforms, and other commercial applications.

**How can AI agents access content?**
All pages support Markdown output via `.md` URL suffix or `Accept: text/markdown` header. A full self-contained API reference is available at https://oldcarsdata.com/llms-full.txt. AI tools can also connect via the MCP server at https://api.oldcarsdata.com/mcp.

## Data Sources

- Bring a Trailer
- Cars & Bids
- Hagerty
- PCAR Market
- All Collector Cars
- Daily auction updates
- Historical data since 2018

## Legal Notice

oldcarsdata.com is not affiliated with, sponsored, or endorsed by the companies listed, described, or featured on its site. Company logos or trademarks used do not imply endorsement and are the property of their respective owners.