
Portfolio analysis and optimization.
Portfolio Optimizer API is a free Finance API that requires no API key, is served over HTTPS and supports CORS, so it can be called from the browser.
The Nobel Prize-winning science of portfolio optimization, available as a Web API.
Details from portfoliooptimizer.io.

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The Portfolio Optimizer API is provided by Portfolio Optimizer (portfoliooptimizer.io). The Nobel Prize-winning science of portfolio optimization, available as a Web API.
Yes. The Portfolio Optimizer API is listed in the Finance 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 Portfolio Optimizer API requires no authentication, so you can start making requests without signing up.
Yes. The Portfolio Optimizer API supports CORS, so front-end JavaScript can call it directly.
Yes. The Portfolio Optimizer API is served over HTTPS, so it's safe to use in production.