How merchant can be connected to Visa Account Updater?
Can merchant connect to VAU without his acquirer? Or connection is possible only via acquirer?
Visa Account Updater API is for issuers to query merchants that have requested updates on the issuer’s cards, not for merchants to submit inquiries to VAU. Are you a user that intends to use the API on behalf of issuers or merchants?
I'm still not really sure if I receive essential response - so my question is - can merchant connect to VAU API by himself - with no acquirer participation or not? Or merchant can be connected to VAU only if merchant's bank-acquirer is connected to VAU API?
On your website I see that Visa Account Updater is "AVAILABLE FOR USE BY: Issuer Banks, Independent Developers".
The current VAU API is only for issuers and we do not have an VAU API for merchants.
You've reached the Visa Developer Platform. This platform is for the developer community, banks and merchants to build solutions with our APIs to market to their customers. It's not a solution for end users, though you are free to create an account and experiment in our sandbox.
If I've misunderstood, and you are a developer looking to build a solution for your customers, please visit this link to "Get Started" and find an API that meets your use case. https://developer.visa.com/pages/working-with-visa-apis