I have created React app and trying to connect users ethereum account via gnosis-safe. I'm added manifest.json content as required here https://docs.gnosis-safe.io/build/sdks/safe-apps/releasing-your-safe-app but still got an error Failed to fetch app manifest while trying add my app in safe app.

To connect safe wallet I'm using react-web3 and @gnosis.pm/safe-apps-web3-react connector.

I'm 100% sure that manifest.json and logo available in the app root by url.

here my manifest.json

  {"short_name": "Appname",
  "name": "Appname",
  "description": "A platform for ...",
  "iconPath": "./logo.svg",
  "icons": [
      "src": "favicon.ico",
      "sizes": "64x64 32x32 24x24 16x16",
      "type": "image/x-icon"
      "src": "logo192.png",
      "type": "image/png",
      "sizes": "192x192"
      "src": "logo512.png",
      "type": "image/png",
      "sizes": "512x512"
  "start_url": ".",
  "display": "standalone",
  "theme_color": "#000000",
  "background_color": "#ffffff"

I need only get user's ethereum address, not sending any transactions, so I don't think I need add some Sdk's etc. Can anybody help me? Maybe there is a simple way to validate my manifest or check how it fetching from my app?

1 Answer 1


You need to configure Cross-Origin Resource Sharing on the server where manifest.json is hosted.

You can also check https://stackoverflow.com/questions/67259947/access-to-web-manifest-blocked-by-cors-policy

  • Yes, you are right. Thanks a lot. Feb 3, 2022 at 14:02

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