API429 in Cline: OpenAI Compatible settings and a bounded first check

Prepare the model and a disposable workspace

Use an installed Cline client, an API429 key and a model available to that key. The example is gpt-6.1-sol. Check GET /v1/models before choosing it, because a public card is not a key-specific access guarantee. Start with an empty test directory or a small nonsecret text file rather than granting access to a production repository for an endpoint check.

Open settings with the Cline gear control and choose OpenAI Compatible. The model family name alone does not select a transport: GPT or Gemini branding is not proof of a particular request method. Native Cline execution was not performed for this guide. A first request may be paid, and a successful text response would not establish a complete agent workflow.

Enter the connection fields carefully

Use https://gateway.api429.com/v1 as Base URL, save your API429 key in the API Key field and enter gpt-6.1-sol as Model ID. Use Custom Model ID where that is the field offered by your version. Do not paste the full /v1/chat/completions path into the base field or append another /v1. The example is a field reference rather than an importable application configuration.

Keep credentials out of shared workspace files, screenshots and diagnostic messages. If your Cline version maintains separate Plan and Act provider settings, inspect both before starting a task. Saving one mode does not establish the other mode uses the same selection. Follow the actual interface labels in your installed build instead of copying an unrelated settings.json from another client.

Do not invent context and output limits

Model Configuration exposes fields such as Context Window Size and Max Output Tokens. These settings help the client manage context and output, but they should use confirmed limits for the exact API429 ID. The reviewed public catalog did not establish effective context and output maxima for this connection, so this guide does not fill those fields with manufacturer marketing numbers.

Obtain current limits for the chosen connection before submitting a large project. An unset output field does not mean unlimited output. Keep the initial question small and use a bounded limit where the client and request method support it. Image support, MCP, computer use and file operations each require a separate check; a checkbox cannot create a model capability.

Check text before enabling agent actions

Ask a short nonconfidential text question first and inspect the response. For 401, check the protected key field and provider selection. For a missing model, compare the literal ID with the authenticated catalog. For a limit error, reduce the supplied context and confirm the effective limits before retrying. Use redacted error details and avoid repeated large requests.

The public catalog marks gpt-6.1-sol with function_calling, but that does not prove the complete Cline tool cycle. The API429 client reference associates GPT 6.1 Sol tooling with Responses API. Selecting OpenAI Compatible does not establish that your client sends that method and format. If it sends Chat Completions tools, verify support before permitting file edits or shell commands.

Measure usage and review a Roo Code migration

Cline estimates depend on the prices and accounting configured in the client. Actual API429 charges depend on requests and token usage, including growing context and repeated actions. Compare actual usage in API429 instead of treating a task estimate as a fixed charge. Cline application terms and any separate software costs remain distinct from API billing.

Roo Code published an official sunset notice: its Extension, Cloud and Router ended on May 15, 2026. Treat that dated shutdown as a migration reason rather than following an old installation guide as current advice. Cline is a separate client to evaluate with the settings and checks above. Do not copy old credentials, assume configuration parity or infer native tool compatibility from a basic OpenAI-compatible text request.

Cline connection field reference

API Provider: OpenAI Compatible
Base URL: https://gateway.api429.com/v1
API Key: YOUR_API429_KEY
Model ID: gpt-6.1-sol

Payment and a $10 test

• Russian bank card. Top up your balance in the account.
• Invoice for companies. Bank transfer with closing documents.
• USDT and TON. Top up in crypto.

$10 test credit. Subscribe to our Telegram channel through the bot and get $10 on your balance for the first requests. Get $10 in the bot