---
title: "Changes to Zero Authorization"
method: POST
path: "/checkout/zero-authorization/{merchantId}"
---

# Changes to Zero Authorization

`POST /checkout/zero-authorization/{merchantId}`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 3 of 43 revisions.

- **2026-09-17** `81b590227b14`: 1 warning, 1 info
- **2026-09-12** `66b771d6d31f`: 1 info
- **2026-08-22** `c6be39c0cb2f`: 23 breaking, 5 warning

## Changes

- **2026-09-17** `81b590227b14`: 1 warning, 1 info
  - deleted the `header` request parameter `x-coinflow-auth-session-key`
  - the endpoint scheme security `sessionKey` was added to the API
- **2026-09-12** `66b771d6d31f`: 1 info
  - api operation id `zero-authorization` removed and replaced with `checkout_ZeroAuthorization`
- **2026-08-22** `c6be39c0cb2f`: 23 breaking, 5 warning
  - the `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/card/oneOf[subschema #1: CardData]/address1` request property's minLength was increased from `0` to `1`
  - the `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/card/oneOf[subschema #1: CardData]/cardToken` request property's minLength was increased from `0` to `1`
  - the `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/card/oneOf[subschema #1: CardData]/city` request property's minLength was increased from `0` to `1`
  - the `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/card/oneOf[subschema #1: CardData]/country` request property's minLength was increased from `0` to `2`
  - the `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/card/oneOf[subschema #1: CardData]/expMonth` request property's minLength was increased from `0` to `2`
  - the `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/card/oneOf[subschema #1: CardData]/expYear` request property's minLength was increased from `0` to `2`
  - the `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/card/oneOf[subschema #1: CardData]/firstName` request property's minLength was increased from `0` to `2`
  - the `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/card/oneOf[subschema #1: CardData]/lastName` request property's minLength was increased from `0` to `2`
  - the `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/card/oneOf[subschema #2: CardDataWithoutAddress]/cardToken` request property's minLength was increased from `0` to `1`
  - the `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/card/oneOf[subschema #2: CardDataWithoutAddress]/expMonth` request property's minLength was increased from `0` to `2`
  - the `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/card/oneOf[subschema #2: CardDataWithoutAddress]/expYear` request property's minLength was increased from `0` to `2`
  - the `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/card/oneOf[subschema #2: CardDataWithoutAddress]/firstName` request property's minLength was increased from `0` to `2`
  - the `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/card/oneOf[subschema #2: CardDataWithoutAddress]/lastName` request property's minLength was increased from `0` to `2`
  - the `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/customerInfo/oneOf[subschema #1: SplitNameCustomerInfo]/firstName` request property's minLength was increased from `0` to `1`
  - the `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/customerInfo/oneOf[subschema #1: SplitNameCustomerInfo]/lastName` request property's minLength was increased from `0` to `1`
  - the `oneOf[subschema #2: ZeroAuthorizationCheckoutArgsSavedCardWithoutReason]/customerInfo/oneOf[subschema #1: SplitNameCustomerInfo]/firstName` request property's minLength was increased from `0` to `1`
  - the `oneOf[subschema #2: ZeroAuthorizationCheckoutArgsSavedCardWithoutReason]/customerInfo/oneOf[subschema #1: SplitNameCustomerInfo]/lastName` request property's minLength was increased from `0` to `1`
  - added the pattern `(([^<>()[\]\\.,;:\s@"]+(\.[^<>()[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))` to the request property `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/card/oneOf[subschema #1: CardData]/email`
  - added the pattern `(([^<>()[\]\\.,;:\s@"]+(\.[^<>()[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))` to the request property `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/card/oneOf[subschema #2: CardDataWithoutAddress]/email`
  - added the pattern `^\d+$` to the request property `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/card/oneOf[subschema #1: CardData]/expMonth`
  - added the pattern `^\d+$` to the request property `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/card/oneOf[subschema #1: CardData]/expYear`
  - added the pattern `^\d+$` to the request property `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/card/oneOf[subschema #2: CardDataWithoutAddress]/expMonth`
  - added the pattern `^\d+$` to the request property `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/card/oneOf[subschema #2: CardDataWithoutAddress]/expYear`
  - the `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/card/oneOf[subschema #1: CardData]/country` request property's maxLength was set to `2`
  - the `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/card/oneOf[subschema #1: CardData]/expMonth` request property's maxLength was set to `2`
  - the `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/card/oneOf[subschema #1: CardData]/expYear` request property's maxLength was set to `2`
  - the `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/card/oneOf[subschema #2: CardDataWithoutAddress]/expMonth` request property's maxLength was set to `2`
  - the `oneOf[subschema #1: ZeroAuthorizationCheckoutArgsNewCardWithoutReason]/card/oneOf[subschema #2: CardDataWithoutAddress]/expYear` request property's maxLength was set to `2`

---

[Operation](https://skmtc.dev/coinflow/apis/api-reference/docs/checkout/zero-authorization/:merchantId/post.md) - [API](https://skmtc.dev/coinflow/apis/api-reference.md) - [Page](https://skmtc.dev/coinflow/apis/api-reference/changes/checkout/zero-authorization/:merchantId/post)