Create subscription

Create one or more webhook subscriptions for event notifications by selecting an event type, event version, resource name, and providing a destination event URL. Use the Get Event Types API to retrieve available event types, versions, and resource names. Configure the eventUrl to receive notifications.

URL authentication options

• If authMethod is BASIC_AUTH, Walmart passes an authentication header to the eventUrl using authHeaderName as the header key and the Base64-encoded userName:password as the value.
• If authMethod is HMAC, Walmart passes an authentication header to the eventUrl using authHeaderName as the header key and HMACSHA256 of the complete response as the value, with clientSecret as the key.
• If authMethod is OAUTH, Walmart makes a POST call to authUrl to generate a token with request body "grant_type=client_credentials" and headers: (1) Authorization header using authHeaderName as the key and Base64-encoded clientId:clientSecret as the value, (2) Accept: "application/json; charset=UTF-8", (3) Content-Type: "application/x-www-form-urlencoded; charset=ISO-8859-1", and (4) any custom headers provided in headers. The authUrl must return HTTP 200 with access_token and expires_in fields. When sending notifications to eventUrl, Walmart includes the access_token in headers using authHeaderName as the key and value "Bearer <access_token>", along with any custom headers provided in headers.