Look up a customer ID by alias
Resolves an alias to its Alguna customer ID. The alias accepts the Alguna account ID, a customer alias, or a connected-account external ID (such as a Stripe customer ID). Returns 404 if no customer in your organization matches. Use this when you hold an external identifier and only need the Alguna ID; to fetch the full customer, use Get a customer instead.
Authorizations
API key authentication. Pass your API key as a Bearer token.
Headers
2026-04-01 Query Parameters
Customer alias to resolve — an Alguna account ID, a customer alias, or a connected-account external ID (such as a Stripe customer ID)
"cus_abc123"
Response
Success
Alguna customer ID the alias resolves to
"cust_abc123"