I deployed en ERC721 smart contract to Rinkeby testnet, where I was able to see the collection i minted for myself in the constructor (with images + metadata).

Now, when I minted from a different address, I see 2 issues:

  1. I cannot see the image + metadata even after refresh..
  2. I cannot send (and also none of my collections from contract owner mints) my assets in MetaMask extension.

Thanks you in advance !

  • How are watching the image and metadata? Can you try another wallet?
    – Ismael
    Oct 14, 2021 at 5:59
  • Did you try to validate your metadata through Opensea API? Try visiting the following address: testnets-api.opensea.io/asset/0x{contract address}/{token id}/validate/
    – rioted
    Nov 15, 2021 at 18:50

1 Answer 1


I was having a problem with my metadata and this article really helped.


It includes an api endpoint for the testnet that will show you your token-uri and if you click that it will take you to the page that is serving your jsonenter image description here

  • Mine was valid, but wasn't visible till I clicked refresh button (Refresh metadata)
    – gneric
    Dec 25, 2021 at 18:06
  • @gneric thank you, I just click to refresh button and my NFT showing up on opensea
    – Patrikoko
    Jan 18, 2022 at 10:17

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