
Curated experimental data for materials science.
Materials Platform for Data Science API is a free Science & Math API that requires apiKey authentication, is served over HTTPS and does not support CORS, so it should be called from a server.
The online materials database (PAULING FILE project) with more than 3M entries: physical properties, crystal structures, phase diagrams, available via API, ready for the modern data-intensive applications
Details from mpds.io.

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The Materials Platform for Data Science API is provided by mpds.io (mpds.io). The online materials database (PAULING FILE project) with more than 3M entries: physical properties, crystal structures, phase diagrams, available via API, ready for the modern data-intensive applications
Yes. The Materials Platform for Data Science API is listed in the Science & Math category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
Yes. The Materials Platform for Data Science API uses apiKey authentication, so you need to register for credentials before making requests.
Not directly. The Materials Platform for Data Science API does not allow CORS, so call it from a server, serverless function or proxy instead of front-end JavaScript.
Yes. The Materials Platform for Data Science API is served over HTTPS, so it's safe to use in production.