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After yesterdays maintenance window I started to see Invalid API Key errors returned from the Etherscan Sepolia API endpoint. This API key I'm using was working before yesterdays maintenance, and any new keys created run into the same issue.

https://api-sepolia.etherscan.io/api
   ?module=account
   &action=balance
   &address=0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae
   &tag=latest
   &apikey=$API_KEY

{"status":"0","message":"NOTOK","result":"Invalid API Key"}

Goerli and Mainnet still work fine.

2
  • maybe get a new one and try again. Commented Jan 25 at 4:43
  • @ZartajAfser and any new keys created run into the same issue Commented Jan 25 at 18:23

1 Answer 1

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Seems to be fixed after Scheduled Maintenance for Web (Testnet)

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