Polish Used Car Market API

Real-time valuation, price history, liquidity and regional data — powered by 2M+ active listings from Poland's leading car marketplaces. Built for developers and AI agents.

2M+ Listings 5 Endpoints Pay-as-you-go AI-Ready (MCP) OpenAPI 3.1

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2M+

Active listings indexed

23K+

Make/model/year combos

<50ms

Avg. API response time

Daily

Data refresh cycle

5 Powerful Endpoints

Everything you need to build car valuation tools, price comparison apps, or AI-powered automotive agents.

GET

/v1/market/valuation

Market Valuation

Get average, median, P25 and P75 prices for any make/model/year. Filter by fuel type, gearbox, and mileage range.

8 credits per call

GET

/v1/market/price-history

Price History Trend

Monthly average price trend for up to 24 months. Identify seasonal patterns and long-term depreciation curves.

10 credits per call

GET

/v1/market/liquidity

Market Liquidity

Estimated days-on-market for a vehicle type. Know how fast a car sells before you buy or price it.

6 credits per call

GET

/v1/market/valuation-factors

Valuation Factors

Quantify the price impact of import status, gearbox type, and fuel type. Essential for accurate appraisals.

12 credits per call

GET

/v1/market/regional

Regional Price Differences

Compare prices across Polish voivodeships. Find regional arbitrage opportunities and pricing strategies.

8 credits per call

Simple, Predictable Integration

One header, one request, one clean JSON response. No OAuth flows, no rate-limit surprises — just credits you control.

Single header auth Pass your key via X-API-Key — works in any HTTP client.

Credits returned in every response Always know your remaining balance without an extra API call.

Structured error codes Machine-readable error.code field for reliable error handling.

OpenAPI 3.1 + MCP Server Drop-in compatible with LangChain, Claude, GPT-4 tool-use, and any OpenAPI-aware client.

# Request
curl https://car-dossier.com/api/v1/market/valuation \
  -H "X-API-Key: cd_your_key_here" \
  -G \
  -d "make=Volkswagen" \
  -d "model=Golf" \
  -d "year=2019"

# Response
{
  "status": "success",
  "data": {
    "make": "Volkswagen",
    "model": "Golf",
    "year": 2019,
    "currency": "PLN",
    "valuation": {
      "average": 78400,
      "median": 76900,
      "p25": 68000,
      "p75": 87500
    },
    "sample_size": 342,
    "credits_remaining": 992
  }
}

Built for AI Agents & LLMs

CarDossier API is designed from the ground up to be consumed by AI systems — with structured responses, clear error codes, and native MCP support.

MCP Server

Connect directly to Claude, Cursor, or any MCP-compatible AI client. No custom integration needed.

OpenAPI 3.1 Schema

Full schema at /openapi.yaml. Import into GPT-4 Actions, LangChain, or Postman instantly.

llms.txt

Structured capability manifest at /llms.txt so LLMs understand what this API does without reading docs.

Predictable JSON

Consistent status/data/error envelope. No surprise nulls or format changes between endpoints.

Read the Docs

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