Short answer: copy the JSON below into ~/.config/goose/custom_providers/cloudgpu.json , run export CGW_API_KEY="cgw-sk-your-key" , then start goose with --provider cloudgpu --model deepseek-v4.1-flash .

Disclosure: I work on CloudGPU, and the endpoint in this post is ours. We haven't tested goose against this endpoint ourselves; the steps follow goose's docs ( Configure Custom Provider ). Treat the checks below as things you run, not results we measured.

Note: Tool calling through this endpoint isn't tested by us. goose leans on tool calls for real work, so run the self-checks in Step 5 before you hand it a task that matters.

Why a file and not a built-in provider

goose's CONTRIBUTING.md asks services with an OpenAI-compatible API to publish a goose custom-provider JSON file with their own documentation, so users can drop it into their local custom_providers directory without waiting for a goose release.…