Hi @Toriyama ,
Per my research, We can use a web part context to call an external API using httpClient class available with this object. This class provides us with a method to make get and post methods to any API. Here is the steps for us to reference
https://www.c-sharpcorner.com/article/how-to-call-an-external-api-from-a-spfx-webpart/
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Hi @Toriyama ,
I am checking to see if the problem has been resolved.