
Generate chart and graph images.
QuickChart API is a free Development API that requires no API key, is served over HTTPS and supports CORS, so it can be called from the browser.
Create a chart image with one URL and embed anywhere. Open source, no watermarks.
Details from quickchart.io.

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The QuickChart API is provided by QuickChart (quickchart.io). Create a chart image with one URL and embed anywhere. Open source, no watermarks.
Yes. The QuickChart API is listed in the Development 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 QuickChart API requires no authentication, so you can start making requests without signing up.
Yes. The QuickChart API supports CORS, so front-end JavaScript can call it directly.
Yes. The QuickChart API is served over HTTPS, so it's safe to use in production.