--- title: "Changes to Card Checkout" method: POST path: "/checkout/card/{merchantId}" --- # Changes to Card Checkout `POST /checkout/card/{merchantId}` > Every recorded change to this operation, newest first. ## Timeline Changed in 6 of 43 revisions. - **2026-09-29** `f7dc6dbf5437`: 1 warning - **2026-09-19** `c6e94e0ae714`: 2 breaking - **2026-09-17** `81b590227b14`: 1 warning, 1 info - **2026-09-12** `66b771d6d31f`: 1 info - **2026-08-22** `c6be39c0cb2f`: 33 breaking, 12 warning - **2026-08-06** `7eea51c8775d`: 1 info ## Changes - **2026-09-29** `f7dc6dbf5437`: 1 warning - removed the request property `redemptionCheck` - **2026-09-19** `c6e94e0ae714`: 2 breaking - request property `rent/lamports` list-of-types was narrowed by removing types `number` from media type `application/json` - the `rent/lamports/oneOf[subschema #2]/` request property type changed from `number` to `integer`, and format from `double` to no format - **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 `card-checkout` removed and replaced with `checkout_CardCheckout` - **2026-08-22** `c6be39c0cb2f`: 33 breaking, 12 warning - the `accountFundingTransaction/recipientAftInfo/address1` request property's minLength was increased from `0` to `2` - the `accountFundingTransaction/recipientAftInfo/city` request property's minLength was increased from `0` to `2` - the `accountFundingTransaction/recipientAftInfo/countryCode` request property's minLength was increased from `0` to `2` - the `accountFundingTransaction/recipientAftInfo/firstName` request property's minLength was increased from `0` to `2` - the `accountFundingTransaction/recipientAftInfo/lastName` request property's minLength was increased from `0` to `2` - the `accountFundingTransaction/recipientAftInfo/postalCode` request property's minLength was increased from `0` to `2` - the `accountFundingTransaction/recipientAftInfo/state` request property's minLength was increased from `0` to `2` - the `card/oneOf[subschema #1: CardData]/address1` request property's minLength was increased from `0` to `1` - the `card/oneOf[subschema #1: CardData]/cardToken` request property's minLength was increased from `0` to `1` - the `card/oneOf[subschema #1: CardData]/city` request property's minLength was increased from `0` to `1` - the `card/oneOf[subschema #1: CardData]/country` request property's minLength was increased from `0` to `2` - the `card/oneOf[subschema #1: CardData]/expMonth` request property's minLength was increased from `0` to `2` - the `card/oneOf[subschema #1: CardData]/expYear` request property's minLength was increased from `0` to `2` - the `card/oneOf[subschema #1: CardData]/firstName` request property's minLength was increased from `0` to `2` - the `card/oneOf[subschema #1: CardData]/lastName` request property's minLength was increased from `0` to `2` - the `card/oneOf[subschema #2: CardDataWithoutAddress]/cardToken` request property's minLength was increased from `0` to `1` - the `card/oneOf[subschema #2: CardDataWithoutAddress]/expMonth` request property's minLength was increased from `0` to `2` - the `card/oneOf[subschema #2: CardDataWithoutAddress]/expYear` request property's minLength was increased from `0` to `2` - the `card/oneOf[subschema #2: CardDataWithoutAddress]/firstName` request property's minLength was increased from `0` to `2` - the `card/oneOf[subschema #2: CardDataWithoutAddress]/lastName` request property's minLength was increased from `0` to `2` - the `chargebackProtectionData/items/oneOf[subschema #1: Pick_nftCartItem.Exclude_keyofnftCartItem.sellingPrice-or-itemClass__]/productName` request property's minLength was increased from `0` to `1` - the `customerInfo/oneOf[subschema #1: SplitNameCustomerInfo]/firstName` request property's minLength was increased from `0` to `1` - the `customerInfo/oneOf[subschema #1: SplitNameCustomerInfo]/lastName` request property's minLength was increased from `0` to `1` - the `transactionData/oneOf[subschema #3: KnownTokenIdRedeem]/nftContract` request property's minLength was increased from `0` to `42` - the `transactionData/oneOf[subschema #3: KnownTokenIdRedeem]/nftId` request property's minLength was increased from `0` to `1` - added the pattern `(([^<>()[\]\\.,;:\s@"]+(\.[^<>()[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))` to the request property `card/oneOf[subschema #1: CardData]/email` - added the pattern `(([^<>()[\]\\.,;:\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 `card/oneOf[subschema #2: CardDataWithoutAddress]/email` - added the pattern `^\d+$` to the request property `accountFundingTransaction/recipientAftInfo/phoneNumber` - added the pattern `^\d+$` to the request property `card/oneOf[subschema #1: CardData]/expMonth` - added the pattern `^\d+$` to the request property `card/oneOf[subschema #1: CardData]/expYear` - added the pattern `^\d+$` to the request property `card/oneOf[subschema #2: CardDataWithoutAddress]/expMonth` - added the pattern `^\d+$` to the request property `card/oneOf[subschema #2: CardDataWithoutAddress]/expYear` - added the pattern `^\d{8}$` to the request property `accountFundingTransaction/recipientAftInfo/dateOfBirth` - the `accountFundingTransaction/recipientAftInfo/countryCode` request property's maxLength was set to `2` - the `card/oneOf[subschema #1: CardData]/country` request property's maxLength was set to `2` - the `card/oneOf[subschema #1: CardData]/expMonth` request property's maxLength was set to `2` - the `card/oneOf[subschema #1: CardData]/expYear` request property's maxLength was set to `2` - the `card/oneOf[subschema #2: CardDataWithoutAddress]/expMonth` request property's maxLength was set to `2` - the `card/oneOf[subschema #2: CardDataWithoutAddress]/expYear` request property's maxLength was set to `2` - the `transactionData/oneOf[subschema #3: KnownTokenIdRedeem]/nftContract` request property's maxLength was set to `42` - …5 more - **2026-08-06** `7eea51c8775d`: 1 info - added `#/components/schemas/TravelCartItem, #/components/schemas/FlightTicketCartItem, #/components/schemas/FlightUpgradeCartItem, #/components/schemas/LodgingCartItem` to the `chargebackProtectionData/items/` request property `oneOf` list --- [Operation](https://skmtc.dev/coinflow/apis/api-reference/docs/checkout/card/:merchantId/post.md) - [API](https://skmtc.dev/coinflow/apis/api-reference.md) - [Page](https://skmtc.dev/coinflow/apis/api-reference/changes/checkout/card/:merchantId/post)