Yes. An agency runs one project per client, with no cap on the number, and the whole account is drivable from outside through the API and the MCP server, so the work fits into the tools the agency already runs.
The method itself does not change. Each step is tooled and guides you through its part, and the agency and its client read the same verifiable numbers: same measures, same logbook, same proof, on prompts written in the client's own words.
Several members come with the account at no extra cost, as owner, manager or operator.