Access Ingress logs

At the moment there's no public API for Ingress. It's been talked about for years, and the developers are not against the idea, but there are no recent news about a development.

There is anyway a source where you can get some data that may be useful for your projects, Ingress Intel: this is the official intel map of the game, with logs and map positions. At high zoom levels (i.e. when showing the whole world) it can be painfully slow, since it tries to load every L8 portal on the planet. Focusing on narrower zones though you can see links and fields, and get some informations about single portals. Refreshing the map you can update the informations and let you take time-lapse screenshots of a specific region.

Be careful with the map: if you're planning to use automated tools to retrieve informations, your account may be banned, since the ToS specifically prevents you to access the data with automated tools, bots et al. You may anyway create a throwaway account just for this task, since every information on the map is accessible at any Agent level.

There is no API to retrieve logs.

Extracting data automatically is against Term of Service. However, many players uses IITC, that is tolerated because standard Intel doesn't works very well. Don't expect to get weeks of data from logs anyway.