# API v1 stops working

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

On April 8, 2026, Cal.com API shut down API v1. All endpoints matching /v1/* were removed and calls to them fail. Requests sent to these routes no longer succeed because the entire version was retired.

## What to use instead

Direct calls to the v2 API base endpoint with the API key in an Authorization Bearer header and a cal-api-version header such as 2024-08-13. Moving from v1 requires following the endpoint-by-endpoint migration guide rather than simply updating the base path.

- 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: November 6, 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