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17 versions

Adyen Checkout API

APIs Guru

Adyen Checkout API provides a simple and flexible way to initiate and authorise online payments. You can use the same integration for payments made with cards (including 3D Secure), mobile wallets, and local payment methods (for example, iDEAL and Sofort). This API reference provides information on available endpoints and how to interact with them. To learn more about the API, visit [online payments documentation](https://docs.adyen.com/online-payments). ## Authentication Each request to Checkout API must be signed with an API key. For this, [get your API key](https://docs.adyen.com/development-resources/api-credentials#generate-api-key) from your Customer Area, and set this key to the `X-API-Key` header value, for example: ``` curl -H "Content-Type: application/json" \ -H "X-API-Key: YOUR_API_KEY" \ ... ``` ## Versioning Checkout API supports [versioning](https://docs.adyen.com/development-resources/versioning) using a version suffix in the endpoint URL. This suffix has the following format: "vXX", where XX is the version number. For example: ``` https://checkout-test.adyen.com/v37/payments ``` ## Going live To access the live endpoints, you need an API key from your live Customer Area. The live endpoint URLs contain a prefix which is unique to your company account, for example: ``` https://{PREFIX}-checkout-live.adyenpayments.com/checkout/v37/payments ``` Get your `{PREFIX}` from your live Customer Area under **Developers** > **API URLs** > **Prefix**. When preparing to do live transactions with Checkout API, follow the [go-live checklist](https://docs.adyen.com/online-payments/go-live-checklist) to make sure you've got all the required configuration in place. ## Release notes Have a look at the [release notes](https://docs.adyen.com/online-payments/release-notes?integration_type=api&version=37) to find out what changed in this version!

Updated4mo ago

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7 organizations with at least one published public specification.

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7 results
Organization
Description
Publishes
Joined
AG
APIs Guru
/apis-guru
APIs Guru - Collection of OpenAPI SpecificationsRESTOpenAPI7/10/2026
B
Bartonia
/bartonia
Bryan's TenantRESTOpenAPI9/28/2026
DT
Demo Tenant
/demo
Demo TenantRESTOpenAPI7/12/2026
L2
Level 250
/level-250
——10/31/2026
O
Ouroboros
/ouroboros
Ouroboros Official ProjectRESTOpenAPI8/11/2026
S
Sourcemeta
/sourcemeta
Sourcemeta One JSON Data Type LibraryRESTOpenAPI7/17/2026
S
Stinsonia
/stinsonia
Stinson's DomainRESTOpenAPI7/17/2026
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