ISBN barcode API

What ISBN is for

Books carry their ISBN as an EAN-13 barcode beginning 978 or 979. Send the ISBN with or without hyphens; an ISBN-10 is converted to its 978 form and the check digit is calculated.

Make one from a URL

Send the text and get the image back. Your API key goes in a header.

curl "https://barcode.fmdeploy.com/v2/barcode/isbn?text=978-1-56581-231-4&label=true" \
  -H "Authorization: Bearer bc_live_your_key" -o isbn.png

Add &output=svg for a vector image that stays sharp at any print size.

From FileMaker

Insert from URL [ Select ; With dialog: Off ; Target: Items::Barcode ;
  "https://barcode.fmdeploy.com/v2/barcode/isbn?label=true&text=" & GetAsURLEncoded ( Items::Code ) ;
  cURL options: "--header \"Authorization: Bearer " & $$BARCODE_KEY & "\"" ]

What it accepts

An ISBN-10 or ISBN-13, with or without hyphens. Example: 978-1-56581-231-4

If the text can’t be encoded, the API answers with a clear message instead of a broken image.

Options

Set the bar width with scale, the bar height with thickness, and turn the text under the bars on with label. You can also choose the label font and size, rotate the image in quarter turns, set the DPI stored in a PNG, or ask for SVG. The documentation lists every parameter and its default.

Related formats