/api → version retirement
BaseScan API
Stopped working
On August 15, 2025, BaseScan API V1 will be fully deprecated and requests will fail. This change affects calls to the /api endpoint. After that day, all V1 requests will stop working.
Calls it hits
/api
What to use instead of these calls
Call api.etherscan.io/v2/api with the same module, action, and other query parameters, and include chainid for the target chain. An Etherscan API key covers every supported chain.
In BaseScan API's words
API V1 will be fully deprecated by August 15, 2025 . After that, all V1 requests will stop working.
Facts
- API
- BaseScan API
api.basescan.org - Kind
- Version retirement
- Announced
- July 30, 2025
- Takes effect
- August 15, 2025
- Calls after that day
- Fail
- Source
- Announcement
- Last updated
- Verified
- , against BaseScan API's own pages
Questions
When does this change take effect?
Calls to /api on BaseScan API stopped working on August 15, 2025.
What happens to calls after August 15, 2025?
They have failed since August 15, 2025.
How do I find the calls this hits in my code?
Okapi reads your repository, finds the calls this change hits and opens a pull request with the fix. It never commits to your branches: every change comes as a pull request you review.
You fixed this one by hand.
Okapi opens the pull request with the fix before the next breaking change reaches your code.