OpusGate

Roo Code

Roo Code (a Cline fork) supports the same two provider modes, and everything routes through your endpoint. Settings live in the extension UI — one-time manual setup, no config file to script.

Required values
Anthropic provider → base URL https://api.opusgate.dev (no /v1).
OpenAI-compatible provider → base URL https://api.opusgate.dev/v1 (with /v1).
API key: your sk-og-... from the Keys page.

Install the extension

One command (or find "Roo Code" in the VS Code marketplace):

Bash
code --install-extension RooVeterinaryInc.roo-cline

Anthropic provider (recommended)

  1. Open the Roo side panel → gear icon (Settings) → Providers.
  2. API Provider: Anthropic.
  3. Enable Use custom base URL → https://api.opusgate.dev
  4. API Key: sk-og-...
  5. Model: claude-opus-4.8 or any Claude model from the catalog.
  6. Save and send a test message.

OpenAI Compatible provider

  1. API Provider: OpenAI Compatible.
  2. Base URL: https://api.opusgate.dev/v1
  3. API Key: sk-og-...
  4. Model ID: e.g. claude-sonnet-4.6.
Roo needs native tool calling
Pick a model that supports tool calls — any Claude Opus/Sonnet/Haiku or GPT model qualifies. Budget models without tool-call support won't work in Roo's agent loop.

Troubleshooting

Pricing shows $0 in Roo's UI

Expected — Roo doesn't know OpusGate's prices. Real billing is on the OpusGate side, visible in Transactions.

401 / 402 errors

401 → key mistyped or revoked (Keys); 402 → balance empty (top up). See error codes.

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