Hi @bgarcial!
Just to further clarify, the IP Ranges API you mention above does not include ranges for Terraform Cloud’s internal build workers, as Agents are the preferred secure solution for this problem (as @onlydole mentions).
working well until yesterday without whitelist any IP address on my API access list
This seems like a change in your MongoDB organization or the Atlas MongoDB API then, if it used to work and now requires a specific IP allowlist. The error is returned in Terraform but is a response from that service, not Terraform itself.