# API v1 stops working

Calls to /v1/* on Cal.com API stopped working on April 8, 2026.

On April 8, 2026, API v1 will be shut down and all /v1/* endpoints will fail. The provider is removing these endpoints entirely, meaning requests sent to them will no longer work after that date.

## What to use instead

Direct calls to the v2 API instead, passing the API key in an Authorization Bearer header along with a cal-api-version header, and follow the endpoint-by-endpoint migration guide.

- API: Cal.com API (api.cal.com)
- Kind: Version retirement
- Takes effect: April 8, 2026
- Calls after that day: fail
- Calls it hits: `/v1/*`
- Source: [Announcement](https://cal.com/docs/enterprise-features/api/versioning)
- Verified: October 26, 2026, against Cal.com API's own pages
- Page: https://www.okapi.bot/providers/cal-com-api/breaking-changes/api-v1-stops-working/

## Cal.com API's words

> API v1 was shut down on April 8, 2026. All v1 endpoints have been removed.

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