Is there a way to find out when my version of MP database is from?

Materials Project Materials Project Data/API
1

Hello,

I’d like to find out when my version of MP database is downloaded from. I have 58097 materials in my version - are there any time stamps in the database, or maybe a log of how many materials were in the database in time?

Thanks for the help!

2

All of our API responses include a “created_at” timestamp for the API response. If you didn’t log that, or have a timestamped dump, it would be tricky to help you.

We update the database nightly, and have for quite some time. There may not be new materials every night, but materials may be updated, e.g. with band structures.

If you are in fact keeping your own MongoDB, note that the _id field of each document encodes the timestamp of document creation, so that could help you.