Swanum Comps
Sold resale prices from Vinted (7 European countries) and eBay US, with median and price range
Tokopedia's Official API for integration of various services from Tokopedia.
Tokopedia API is a free Shopping API that requires OAuth authentication, is served over HTTPS and has unconfirmed CORS support.
Details from developer.tokopedia.com.

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Sold resale prices from Vinted (7 European countries) and eBay US, with median and price range
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Sold resale listings from Poshmark with median price, days to sell and net payout after fees
The Tokopedia API is provided by TikTok Shop Partner Center (developer.tokopedia.com).
Yes. The Tokopedia API is listed in the Shopping 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 Tokopedia API uses OAuth authentication, so you need to register for credentials before making requests.
CORS support for the Tokopedia API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The Tokopedia API is served over HTTPS, so it's safe to use in production.