> For the complete index of the 402pay docs, see [llms.txt](https://developer.402pay.co/llms.txt).

# Changelog

What changed in the API, webhooks, checkout and these docs.

The first-release API scope is below. Future changes appear newest first; changes an existing integration must act on are marked Breaking.

September 30, 2026

## API v1 initial release

API Webhooks Checkout Docs

The initial API at `/api/v1` covers payments, hosted checkouts, payment links, customers, signed webhooks, wallets and fee statements. The reference documents the supported networks, authentication, test environments and payment lifecycle. Start with [your first payment](https://developer.402pay.co/quickstart.md) and review the [going-live checklist](https://developer.402pay.co/going-live.md) before accepting real payments.