# API V1 (/api) stops working

Calls to /api on PolygonScan API stopped working on August 15, 2025.

On August 15, 2025, PolygonScan API will retire API V1, and all requests to the /api endpoint will stop working. Calls sent to this version fail after this date. The provider announced that API V1 will be fully deprecated by that day.

## What to use instead

Switch calls to the V2 endpoint at api.etherscan.io/v2/api using the same module, action, and other query parameters. You must also supply the chainid parameter for the target chain, using an Etherscan API key that covers every supported chain.

- API: PolygonScan API (api.polygonscan.com)
- Kind: Version retirement
- Announced: July 30, 2025
- Takes effect: August 15, 2025
- Calls after that day: fail
- Calls it hits: `/api`
- Source: [Announcement](https://kb.etherscan.com/etherscan-api-v1-will-be-fully-deprecated-by-15th-august-2025)
- Verified: October 26, 2026, against PolygonScan API's own pages
- Page: https://www.okapi.bot/providers/polygonscan-api/breaking-changes/api-v1-api-stops-working/

## PolygonScan API's words

> API V1 will be fully deprecated by August 15, 2025 . After that, all V1 requests will stop working.

Okapi finds the calls this change hits in your repo and opens the pull request with the fix: https://github.com/apps/okapi-agent