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`/docs/rest-api/sdk/projects/update-a-project-domain` does not exist. Similar pages:

- [Update a project domain (Vercel SDK)](/docs/rest-api/sdk/projects/update-a-project-domain.md): PATCH /v9/projects/{idOrName}/domains/{domain} Update a project domain's configuration, including the name, git branch and redirect of the domain.
- [Add a domain to a project (Vercel SDK)](/docs/rest-api/sdk/projects/add-a-domain-to-a-project.md): POST /v10/projects/{idOrName}/domains Add a domain to the project by passing its domain name and by specifying the project by either passing the
- [Move a project domain (Vercel SDK)](/docs/rest-api/sdk/projects/move-a-project-domain.md): POST /v1/projects/{idOrName}/domains/{domain}/move Move one project's domain to another project. Also allows the move of all redirects pointed to
- [Update a project domain](/docs/rest-api/projects/update-a-project-domain.md): PATCH /v9/projects/{idOrName}/domains/{domain} Update a project domain's configuration, including the name, git branch and redirect of the domain.
- [Update an existing project (Vercel SDK)](/docs/rest-api/sdk/projects/update-an-existing-project.md): PATCH /v9/projects/{idOrName} Update the fields of a project using either its name or id. Categoryprojects SDK@vercel/sdk (npm i @vercel/sdk)

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