International Identifier for serials
and other continuing resources, in the electronic and print world

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Frequent queries, data exchanges, periodic need for the entire catalogue, etc. Depending on your requirements, choose how you access the ISSN International Register!

  • ISSN Portal
  • Computerised access protocols
  • Raw data file

ISSN Portal

Do you need to refer frequently to the ISSN International Register? Subscribe to the ISSN Portal.

The ISSN Portal is a web-based interface accessible through a subscription fee.

You can choose between two types of subscription:

  • identification by user ID and password,
  • identification with IP authentication

A subscription is valid for a calendar year (January to December) or per quarter.

To request any additional information, contact the Sales department of the ISSN International Centre.

Computerised access protocols

Z39.50 Access

You are a library, documentation centre, etc. and you need to query several catalogues simultaneously: choose to access the ISSN International Register via the Z39.50 protocol (ISO 23950 and ANSI/NISO Z39.50 standards).

Z39.50 access acts as a client-server computer communication protocol: it lets you perform searches in different databases via a computerised network.

To request any additional information, contact the Sales department of the ISSN International Centre.

OAI-PMH protocol

You need to automatically update your local version of the ISSN International Register on a regular basis or to automatically access metadata corresponding to ISSN: choose to access the ISSN International Register via the OAI-PMH protocol.

With this protocol you can:

  • closely monitor changes in the ISSN International Register at a pace adapted to your needs (monthly, weekly, daily, etc.).
  • automatically access at any time a record in the ISSN International Register by performing a search by ISSN,
  • potentially feed into theme-based portals using predefined profiles.

Your application sends http queries to our server, which replies with a flow of data (bibliographic records) in Marc XML.

The protocol specifications are freely accessible on the Openarchives website

To request any additional information, contact the Sales department of the ISSN International Centre.

Raw data file

If you need the entire ISSN International Register at T time, you can ask us for it as a raw data file in the ISO 2709 exchange format.

To request any additional information, contact the Sales department of the ISSN International Centre.