# Metadata integration with OpenSea

**URL:** <https://discuss.ipfs.tech/t/metadata-integration-with-opensea/11076>\
**Category:** Help\
**Created:** [April 28, 2021, 5:45am UTC](https://discuss.ipfs.tech/t/metadata-integration-with-opensea/11076 "2021-04-28T05:45:58Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![PragueSolDev](https://avatars.discourse-cdn.com/v4/letter/p/9f8e36/32.png) [@PragueSolDev](https://discuss.ipfs.tech/u/PragueSolDev)\
**Post date:** [April 28, 2021, 5:45am UTC](https://discuss.ipfs.tech/t/metadata-integration-with-opensea/11076/1 "2021-04-28T05:45:58Z")

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Hi,

I have an issue with metadata. I am using Openzeppelin ERC 721 preset, complied and deployed the contract via Remix to Rinkeby and want to see it in testnet on OpenSea.  
I established a IPFS folder with metadata files 0, 1 etc (created with Windows Notepad saved as .json, uploaded to IPFS and then renamed so that the “.json” is not there); next, I minted token with tokenURI “ipfs://-CID-/0”; however I cannot see this on a testnet validate check which throws me an error: “InvalidTokenUrlResponseException: Invalid JSON response for URL: [https://ipfs.io/ipfs/-CID-/0](https://ipfs.io/ipfs/-CID-/0)”. I am using OpenSea metadata standard.  
When I open the ipfs link, it shows the file fine.

Can you please help me how to resolve this one?

Thanks!

P.