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post/carsensor/v1/search3 credits

Search CarSensor's live used-car inventory. Needs at least one narrowing parameter — `query`, `prefecture`, `region`, `city`, `maker`, `model` or any filter — because without one the source would hand back the whole 519 000-car national list 30 rows at a time; the error says so rather than returning it. Every filter here was measured biting against TWO controls in the same run (a narrow keyword search and a whole prefecture), and the numbers are in each parameter's description. 🔴 Page size is fixed by the source at 30 and there is no override. The source does not error on a page past the end: it silently repeats the LAST page (measured on two different result sets), so `last_page` is computed from the source's own total and `page_clamped` tells you when that happened. 🔴 Prices come back as plain yen. The site itself prints 万円 (ten-thousand yen) units, e.g. `68.1万円`, so every `*_jpy` field is that figure times 10 000 and `*_display` carries the source's own string beside it. Mileage is the same: the card prints `1.7万km` and `mileage_km` returns 17000.

Working example
Parameters
request preview
curl -X POST https://api.reefapi.com/carsensor/v1/search \
  -H "x-api-key: $REEF_KEY" \
  -H "content-type: application/json" \
  -d '{"query":"prius","max_results":"20"}'

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