> For the complete documentation index, see [llms.txt](https://docs.ecommerce.seb.ee/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ecommerce.seb.ee/seb-docs-draft/seb-docs-public-lt/api-nuoroda/prekybininko-api/payments/checkout-sessions/click-to-pay-checkout-sessions.md).
# Click To Pay Checkout Sessions
## Create Click to Pay checkout session
> Starts a new Click To Pay checkout session for the payment.\
> \
> Further processing continues according to the card session flow.\
> \
> This endpoint is available only for customer-initiated payments.
```json
{"openapi":"3.1.0","info":{"title":"E-commerce Gateway API","version":"1.0.0"},"tags":[{"name":"Click to Pay Checkout Sessions"}],"servers":[{"description":"Production server for live traffic","url":"https://api.ecommerce.seb.ee"},{"description":"Sandbox testing environment","url":"https://sandbox.api.ecommerce.seb.ee"}],"security":[{"oauth2ClientCredentials":[]}],"components":{"securitySchemes":{"oauth2ClientCredentials":{"flows":{"clientCredentials":{"scopes":{},"tokenUrl":"https://api.ecommerce.seb.ee/auth/realms/participants-seb/protocol/openid-connect/token"}},"type":"oauth2"}},"schemas":{"CreateClickToPayCheckoutSessionRequest":{"type":"object","description":"Details required to start a Click to Pay checkout session for the payment","properties":{"checkoutResponse":{"$ref":"#/components/schemas/CheckoutResponseData"},"headers":{"type":"object","additionalProperties":{"type":"string"},"description":"Dictionary containing header fields as received from Click to Pay JS library after completing the checkout flow."},"network":{"type":"string","description":"The payment network used for the transaction.","minLength":1}},"required":["checkoutResponse","headers","network"],"title":"Create Click to Pay checkout session request"},"CheckoutResponseData":{"type":"object","description":"Checkout response data received from the Click to Pay JS library after the customer completes the checkout flow","properties":{"maskedCard":{"$ref":"#/components/schemas/MaskedCard"},"srcCorrelationId":{"type":"string","description":"Correlation ID for the Click to Pay checkout, as received from the Click to Pay JS library","minLength":1},"srciTransactionId":{"type":"string","description":"Transaction ID for the Click to Pay checkout, as received from the Click to Pay JS library","minLength":1}},"required":["maskedCard","srcCorrelationId","srciTransactionId"]},"MaskedCard":{"type":"object","description":"Masked details of the card selected in the Click to Pay checkout flow","properties":{"panBin":{"type":"string","description":"Leading digits of the card number (bank identification number)"},"panExpirationMonth":{"type":"string","description":"Expiry month of the card"},"panExpirationYear":{"type":"string","description":"Expiry year of the card"},"panLastFour":{"type":"string","description":"Last four digits of the card number","minLength":1}},"required":["panLastFour"]},"CheckoutSessionInformationResponse":{"type":"object","description":"Card checkout session details, including its current status and the next action required to complete the payment","properties":{"_links":{"$ref":"#/components/schemas/CheckoutSessionInformationResponse.Links"},"action":{"description":"Next action required to complete the payment, if any","oneOf":[{"$ref":"#/components/schemas/Initiate3DSAuthenticationAction"},{"$ref":"#/components/schemas/InitiateScofAuthenticationAction"},{"$ref":"#/components/schemas/PerformScofAuthenticationAction"},{"$ref":"#/components/schemas/Show3DSChallengeAction"},{"$ref":"#/components/schemas/ShowDccOfferAction"}]},"sessionId":{"type":"string","description":"Unique ID of the checkout session","maxLength":64},"sessionStatus":{"$ref":"#/components/schemas/CheckoutSessionStatus"}}},"CheckoutSessionInformationResponse.Links":{"type":"object","description":"Links related to the checkout session","properties":{"checkoutRedirect":{"$ref":"#/components/schemas/Link","description":"Link to the Gateway hosted checkout page where the customer can complete the payment"}}},"Link":{"type":"object","description":"A hyperlink to a related resource","properties":{"href":{"type":"string","description":"URL of the linked resource"}}},"Initiate3DSAuthenticationAction":{"allOf":[{"$ref":"#/components/schemas/CardAction"},{"type":"object","properties":{"_links":{"$ref":"#/components/schemas/Initiate3DSAuthentication.Links"}}}],"description":"Action indicating that 3DS authentication must be initiated for the payment"},"CardAction":{"type":"object","description":"Next action required to complete a card payment; the type property identifies which action to take","discriminator":{"mapping":{"INITIATE_3DS_AUTHENTICATION":"#/components/schemas/Initiate3DSAuthenticationAction","INITIATE_SCOF_AUTHENTICATION":"#/components/schemas/InitiateScofAuthenticationAction","OFFER_DCC":"#/components/schemas/ShowDccOfferAction","PERFORM_SCOF_AUTHENTICATION":"#/components/schemas/PerformScofAuthenticationAction","SHOW_3DS_CHALLENGE":"#/components/schemas/Show3DSChallengeAction"},"propertyName":"type"},"properties":{"type":{"$ref":"#/components/schemas/SessionActionType"}},"required":["type"]},"SessionActionType":{"type":"string","description":"Identifies the next action required to complete a card payment:\n\n* INITIATE_3DS_AUTHENTICATION - 3DS authentication must be initiated for the payment\n* SHOW_3DS_CHALLENGE - the customer must complete a 3DS challenge to authenticate the payment\n* INITIATE_SCOF_AUTHENTICATION - SCOF authentication must be initiated for the payment\n* PERFORM_SCOF_AUTHENTICATION - the customer must complete a SCOF authentication to authenticate the payment\n","enum":["INITIATE_3DS_AUTHENTICATION","INITIATE_SCOF_AUTHENTICATION","OFFER_DCC","PERFORM_SCOF_AUTHENTICATION","SHOW_3DS_CHALLENGE"]},"Initiate3DSAuthentication.Links":{"type":"object","description":"Links related to initiating 3DS authentication","properties":{"threeDsMethod":{"$ref":"#/components/schemas/Link"}}},"InitiateScofAuthenticationAction":{"allOf":[{"$ref":"#/components/schemas/CardAction"}],"description":"Indicates that SCOF authentication must be started for the checkout session"},"PerformScofAuthenticationAction":{"allOf":[{"$ref":"#/components/schemas/CardAction"},{"type":"object","properties":{"_links":{"$ref":"#/components/schemas/PerformScofAuthenticationAction.Links"}}}],"description":"Indicates that the customer must be redirected to perform the SCOF authentication"},"PerformScofAuthenticationAction.Links":{"type":"object","description":"Links to follow to perform the SCOF authentication","properties":{"redirectUrl":{"$ref":"#/components/schemas/Link","description":"Authentication UI URL where the customer should be redirected to perform the authentication"}}},"Show3DSChallengeAction":{"allOf":[{"$ref":"#/components/schemas/CardAction"},{"type":"object","properties":{"challengeHtml":{"type":"string","description":"3DS challenge HTML content"}}}],"description":"Action indicating that the customer must complete a 3DS challenge to authenticate the payment"},"ShowDccOfferAction":{"allOf":[{"$ref":"#/components/schemas/CardAction"},{"type":"object","properties":{"conversionRate":{"type":"string","description":"DCC conversion rate"},"markup":{"type":"string","description":"Markup percentage"},"transactionAmount":{"$ref":"#/components/schemas/Amount","description":"Transaction amount in cardholder currency after DCC is applied"}}}],"description":" DCC details for the payment.\n\n This action is available only for DCC enabled payments.\n","title":"DCC offer action"},"Amount":{"type":"object","description":"Monetary amount together with its currency","properties":{"amount":{"type":"string","description":"The amount given with fractional digits, where fractions must be compliant to the currency definition.\nUp to 14 significant figures. The decimal separator is a dot.\nCan be 0 for account verification (save payment method for future usage without initial payment).\n\n**Example:**\nValid representations for EUR with up to two decimals are:\n * 1056\n * 5768.2\n * 1.50\n * 5877.78\n"},"currency":{"type":"string","description":"ISO 4217 alpha-3 currency code"}},"required":["amount","currency"]},"CheckoutSessionStatus":{"type":"string","description":"Status of the checkout session","enum":["INITIALIZED","WAITING_AUTHENTICATION","WAITING_CHALLENGE","WAITING_PRE_SCA","WAITING_SCA","WAITING_CONFIRMATION","SENT_FOR_PROCESSING","FAILED","COMPLETED"],"title":"Checkout session status"},"ErrorResponse":{"type":"object","description":"Contains details of the error that occurred during an API call","properties":{"apiClientMessages":{"type":"array","items":{"$ref":"#/components/schemas/ApiClientMessage"}}}},"ApiClientMessage":{"type":"object","description":"A single error message returned for the API call","properties":{"category":{"$ref":"#/components/schemas/ApiClientMessage.Category"},"code":{"type":"string","description":"Error code"},"text":{"type":"string","description":"Description of the error"}}},"ApiClientMessage.Category":{"type":"string","description":"Severity category of the message:\n\n* ERROR - the request could not be processed\n","enum":["ERROR"]}}},"paths":{"/egw/{version}/payments/{paymentId}/sessions/click-to-pay":{"post":{"description":"Starts a new Click To Pay checkout session for the payment.\n\nFurther processing continues according to the card session flow.\n\nThis endpoint is available only for customer-initiated payments.\n","operationId":"createClickToPayCheckoutSession","parameters":[{"description":"ID of the request, unique to the call, as determined by the initiating party","in":"header","name":"X-Request-Id","required":true,"schema":{"type":"string","format":"uuid","description":"ID of the request, unique to the call, as determined by the initiating party"}},{"description":"Unique ID of the payment","in":"path","name":"paymentId","required":true,"schema":{"type":"string","description":"Unique ID of the payment","maxLength":64}},{"in":"path","name":"version","required":true,"schema":{"type":"string"}}],"requestBody":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/CreateClickToPayCheckoutSessionRequest"}}},"required":true},"responses":{"200":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/CheckoutSessionInformationResponse"}}},"description":"OK"},"400":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/ErrorResponse"}}},"description":"Bad Request"},"403":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/ErrorResponse"}}},"description":"Forbidden"},"404":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/ErrorResponse"}}},"description":"Not Found"},"409":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/ErrorResponse"}}},"description":"Conflict"},"503":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/ErrorResponse"}}},"description":"Service Unavailable"}},"summary":"Create Click to Pay checkout session","tags":["Click to Pay Checkout Sessions"]}}}}
```
---
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