There are 3 different ways to request data in various format from the SmartGRTgaz' API system :

1. Get all the data for the defined period D-1 to D+1

2. Get all the data for a chosen period

Example for the period 2012 September the 3rd to september the 4th, in XML format and in French version :
http://www.smart.grtgaz.com/api/v1/fr/search?startDate=2012-09-03&endDate=2012-09-04

Attention : it is not possible to request for more than 1 month of data. If you do so, your answer will be restricted

3. Select your data and your period

If you are interested in this option, please e-mail us on : transmission-ops@grtgaz.com