Product certificate

Look up the grading certificate, creation date, and price recorded for a DYLI product ID.

GET /api/public/v1/products/{'}productId{'}/cert

curl "https://www.dyli.io/api/public/v1/products/33262/cert" \
  -H "x-api-key: $DYLI_API_KEY"

When a certificate is recorded, the response includes the cert number, grader, and grade:

{
  "product_id": 33262,
  "product_name": "Pokemon - 1999 Chansey-Holo #3 Game PSA 9",
  "created_at": "2026-07-20T18:15:00.625431+00:00",
  "price": 371.57,
  "has_cert": true,
  "cert_number": "78437996",
  "grader": "PSA",
  "grade": "MINT 9"
}

When the product exists but has no certificate, the endpoint still returns 200 OK:

{
  "product_id": 12345,
  "product_name": "Example product",
  "created_at": "2026-01-01T12:00:00+00:00",
  "price": 25,
  "has_cert": false,
  "cert_number": null,
  "grader": null,
  "grade": null,
  "message": "No certificate is recorded for this product"
}

An unknown product ID returns 404 Not Found. A missing API key returns 401 Unauthorized.