I confirmed I can call the deploy endpoint using the v0 platform API. The webUrl gives me the deployment URL for that specific deployment.
How can I get the production URL for a project using the v0 API?
The deployment response from the deploy endpoint includes an alias array that lists all aliases tied to that deployment, including the production URL. You can grab it directly from there.
Alternatively, you can use the Projects API to fetch the production URL for a project:
GET https://api.vercel.com/v9/projects/{idOrName}
The response includes a alias field and also the project’s linked domains. The production deployment alias is typically in the format {project-name}.vercel.app unless a custom domain is configured.
You can also list all deployments and filter by target: "production":
GET https://api.vercel.com/v6/deployments?projectId={projectId}&target=production&limit=1
This returns the latest production deployment, and the url or alias fields will have what you need.
Hey! To help debug your v0 project, could you share your v0 chat link?
It looks like https://v0.app/chat/... — you can copy it from your browser’s address bar while in the chat.
You’ll also need to unlist the chat so our team can view it — here’s how: Sharing | v0 Docs
This helps the team reproduce what you’re seeing much faster. Thanks!
wont that make it publicly available on this forum? How can I share it privately?
I can message you so you can share the chat with me 
However, did you review my post above?
I didn’t but honestly its because I was so thrown off by the response.
The deployment response from the deploy endpoint includes an
aliasarray that lists all aliases tied to that deployment, including the production URL. You can grab it directly from there.
where is that property? I mentioned in my message im using the v0 platform api. I dont see an alias property in the response in the docs
Lets so I do use the vercel api for this. Im still not sure how I would get the projectId. I’ve created a project in v0 and deployed it in v0. I have a v0 projectId and a v0 deploymentId, but neither of them look they map to vercel IDs