Image sharing platform for anime images.
Waifu.pics API is a free Anime API that requires no API key, is served over HTTPS and does not support CORS, so it should be called from a server.

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Resources from Studio Ghibli films
Yes. The Waifu.pics API is listed in the Anime 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.
No. The Waifu.pics API requires no authentication, so you can start making requests without signing up.
Not directly. The Waifu.pics API does not allow CORS, so call it from a server, serverless function or proxy instead of front-end JavaScript.
Yes. The Waifu.pics API is served over HTTPS, so it's safe to use in production.