#### Français Version
The bibliographic records of the collective catalogue of the bibnet.lu library network are also searchable via the Z39.50 protocol.
This protocol meets the ISO 23950 standard, “Information and documentation — Information retrieval (Z39.50) — Application service definition and protocol specification”.
**Please, visit [http://data.bnl.lu/apis/z39-50/](http://data.bnl.lu/apis/z39-50/) to learn more about BnL’s Z39.50 server.**
#### French version
Bibliographic records of the collective catalogue of the bibnet.lu library network are also available by Z39.50.
This protocol complies with ISO 23950, “Information and documentation — Information retrieval (Z39.50) — Application service definition and protocol specification”.
**Please visit [http://data.bnl.lu/apis/z39-50/](http://data.bnl.lu/apis/z39-50/) to learn more about the BnL Z39.50 server.**
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FAQ
Frequently Asked Questions
Some basic informations about API Store ®.
Operation and development of APIs are currently fully funded by company Apitalks and its usage is for free.
Yes, you can.
All important information such as time of last update, license and other information are in response of each API call.
In case of major update that would not be compatible with previous version of API, we keep for 30 days both versions so you will have enough time to transfer to new version. We will inform you about the changes in advance by e-mail.