Recent Revisions to This Document {#uctp-doc-revisions}
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26.04.01 {#uctp-doc-revisions_section_s11_tdm_w3c}
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Added information about client and server keys. See these topics:

* [API Authentication Keys](/docs/cybs/en-us/unified-click-to-pay/developer/all/rest/unified-click-to-pay/uctp-appendix-intro/uctp-keys/uctp-keys-api-keys.md "")
* [JWT Validation Keys](/docs/cybs/en-us/unified-click-to-pay/developer/all/rest/unified-click-to-pay/uctp-appendix-intro/uctp-keys/uctp-keys-jwt-keys.md "")
* [Client-Side PAN Encryption Keys](/docs/cybs/en-us/unified-click-to-pay/developer/all/rest/unified-click-to-pay/uctp-appendix-intro/uctp-keys/uctp-keys-pan-enc-keys.md "")
* [Token Management MLE Keys](/docs/cybs/en-us/unified-click-to-pay/developer/all/rest/unified-click-to-pay/uctp-appendix-intro/uctp-keys/uctp-keys-tms-mle-keys.md "")
  {#uctp-doc-revisions_ul_qrx_cbp_53c}  
  Added information about the required keys for checkout(). See [checkout()](/docs/cybs/en-us/unified-click-to-pay/developer/all/rest/unified-click-to-pay/uctp-getting-started/uctp-get-started-checkout.md "") and [checkout() API Specifications](/docs/cybs/en-us/unified-click-to-pay/developer/all/rest/unified-click-to-pay/uctp-api-specifications/uctp-api-specs-checkout.md "").

26.03.01
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Added version to the capture context example. See [Capture Context](/docs/cybs/en-us/unified-click-to-pay/developer/all/rest/unified-click-to-pay/uctp-integration-details/uctp-ss-setup/uctp-capture-context-intro.md "").  
Updated the `uctp` object to `vsdk` in all examples. See these topics:

* [initialize()](/docs/cybs/en-us/unified-click-to-pay/developer/all/rest/unified-click-to-pay/uctp-getting-started/uctp-get-started-initialize.md "")
* [getCards()](/docs/cybs/en-us/unified-click-to-pay/developer/all/rest/unified-click-to-pay/uctp-getting-started/uctp-get-started-getcards.md "")
* [checkout()](/docs/cybs/en-us/unified-click-to-pay/developer/all/rest/unified-click-to-pay/uctp-getting-started/uctp-get-started-checkout.md "")
* [initiateIdentityValidation()](/docs/cybs/en-us/unified-click-to-pay/developer/all/rest/unified-click-to-pay/uctp-getting-started/uctp-get-started-init-validate.md "")
* [unbindAppInstance()](/docs/cybs/en-us/unified-click-to-pay/developer/all/rest/unified-click-to-pay/uctp-getting-started/uctp-get-started-unbind-app.md "")  
  Updated the intialize() example and syntax. See [initialize()](/docs/cybs/en-us/unified-click-to-pay/developer/all/rest/unified-click-to-pay/uctp-getting-started/uctp-get-started-initialize.md "") and [initialize() API Specifications](/docs/cybs/en-us/unified-click-to-pay/developer/all/rest/unified-click-to-pay/uctp-api-specifications/uctp-api-specs-initialize.md "").

26.02.01
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Initial release.