Should you switch from An internal API script?
If you have engineering capacity to spare and a process no tool matches, build it. Most teams discover the launch script was the easy part and the maintenance is the product: API version migrations, guardrails, previews, analytics and an interface for teammates who do not read code. Volume Creatives is that maintenance, already done, with an MCP server if you still want to drive it from your own code.
Both tools launch ads in bulk. The difference is the trust layer and the workflow around it: Volume Creatives adds a verified enhancement opt-out, Post-ID scaling, a creative library, analytics that find winners, and an agent-native MCP server. See full pricing.