The BIN Lookup API provides endpoints for retrieving information, such as cost estimates, and 3D Secure supported version based on a given BIN. ## Authentication You need an [API credential](https://docs.adyen.com/development-resources/api-credentials) to authenticate to the API. If using an API key, add an `X-API-Key` header with the API key as the value, for example: ``` curl -H "Content-Type: application/json" \n-H "X-API-Key: YOUR_API_KEY" \n... ``` Alternatively, you can use the username and password to connect to the API using basic authentication, for example: ``` curl -U "ws@Company.YOUR_COMPANY_ACCOUNT":"YOUR_BASIC_AUTHENTICATION_PASSWORD" \n-H "Content-Type: application/json" \n... ``` ## Versioning The BinLookup 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://pal-test.adyen.com/pal/servlet/BinLookup/v54/get3dsAvailability ```## Going live To authneticate to the live endpoints, you need an [API credential](https://docs.adyen.com/development-resources/api-credentials) from your live Customer Area. The live endpoint URLs contain a prefix which is unique to your company account: ``` https://{PREFIX}-pal-live.adyenpayments.com/pal/servlet/BinLookup/v54/get3dsAvailability ``` Get your `{PREFIX}` from your live Customer Area under **Developers** > **API URLs** > **Prefix**.

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