DOI

GET/v0/doi

Validates a DOI (Digital Object Identifier) — a persistent identifier for scientific publications, datasets, and other research outputs. The format is 10.XXXX/suffix where the prefix identifies the registrant. Accepts raw DOIs, doi: prefixed, or full https://doi.org/ URLs.

Guides: Node.js · Python

Try it

Query Parameters

Param	Type	Required	Description
value	string	Yes	DOI to validate (e.g. `10.1038/nature12373` or full URL)
lookup	string	No	Set to `true` to fetch publication metadata from doi.org (title, authors, publisher)

Example Request

curl -H "Authorization: Bearer YOUR_API_KEY" \
  "https://api.isvalid.dev/v0/doi?value=10.1038/nature12373"

Response Fields

Field	Type	Description
valid	boolean	Whether the DOI has a valid format
doi	string	Normalised DOI string
prefix	string	DOI prefix (e.g. 10.1038)
suffix	string	DOI suffix (part after /)
registrantCode	string	Registrant code (prefix without 10.)
registrant	string	Known registrant name (if recognised)
url	string	Resolver URL (https://doi.org/...)
metadata	object	Publication metadata (only when `lookup=true`). Contains `title`, `authors`, `publisher`, `type`, `issued`
error	string	Error message when invalid

Example Response

{
  "valid": true,
  "doi": "10.1038/nature12373",
  "prefix": "10.1038",
  "suffix": "nature12373",
  "registrantCode": "1038",
  "registrant": "Nature Publishing Group",
  "url": "https://doi.org/10.1038/nature12373"
}

Example Response — with lookup

{
  "valid": true,
  "doi": "10.1038/nature12373",
  "prefix": "10.1038",
  "suffix": "nature12373",
  "registrantCode": "1038",
  "registrant": "Nature Publishing Group",
  "url": "https://doi.org/10.1038/nature12373",
  "metadata": {
    "found": true,
    "title": "Gravitational waves from binary pulsars",
    "authors": ["J. H. Taylor"],
    "publisher": "Springer Science and Business Media LLC",
    "type": "journal-article",
    "issued": [[1994, 1]]
  }
}