> For the complete documentation index, see [llms.txt](https://docs.fastrouter.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fastrouter.ai/integrations/cline.md). # Cline #### What is Cline? [Cline](https://cline.bot/) is an AI coding assistant that integrates directly into your VS Code environment, providing autonomous coding capabilities—it can create and edit files, run commands, and complete multi-step tasks with your approval. It supports any OpenAI-compatible provider through its API settings. By routing Cline through FastRouter, you get: * **100+ models** from OpenAI, Anthropic, Google, xAI, Meta, Groq, Mistral, and more through one endpoint—including coding models like [Grok Code Fast 1](https://fastrouter.ai/models/x-ai/grok-code-fast-1) * **Observability** for every request: cost, tokens, latency, and model selection tracked in real time * **Reliability** through automatic failover across providers, response caching, and intelligent routing * **Governance** with per-key budgets, rate limits, model restrictions, role-based access, and project isolation This guide covers configuring the Cline VS Code extension to use FastRouter as an OpenAI-compatible provider. **Prerequisites** * A FastRouter.ai account ([sign up](https://fastrouter.ai)) * VS Code with the [Cline extension](https://marketplace.visualstudio.com/items?itemName=saoudrizwan.claude-dev) installed *** #### Quick Start **Step 1: Get Your FastRouter API Key** 1. Sign up or log in at [fastrouter.ai](https://fastrouter.ai) 2. Navigate to your project's **Keys** page 3. Click **Create User Key** 4. Copy the key immediately. FastRouter does not display the key again after creation. **Step 2: Configure the API Provider** Open **Cline Settings** in VS Code and configure: 1. **API Provider:** select **OpenAI Compatible** 2. **Base URL:** ``` https://api.fastrouter.ai/api/v1 ```
3. **API Key:** paste your FastRouter API key 4. **Model ID:** enter a FastRouter model slug, for example: ``` x-ai/grok-code-fast-1 ``` **Step 3: Start a Task** Give Cline a task. All requests now route through FastRouter, and every request, token count, and cost appears in your [FastRouter Dashboard](https://dashboard.fastrouter.ai/).
*** #### Use Cline with 100+ Models FastRouter uses the `provider/model-name` format. Change the **Model ID** in Cline's settings to any catalog slug: ``` # Anthropic Claude anthropic/claude-4.5-sonnet # OpenAI openai/gpt-5.2 # xAI Grok x-ai/grok-4 ``` Check the [FastRouter Model Catalog](https://fastrouter.ai/models) for available models and input modalities (text, image, file). **Automatic Model Selection** Let FastRouter pick the best model for each request based on query complexity, domain, and cost. Use this Model ID: ``` fastrouter/auto ``` [Explore automatic model selection](https://docs.fastrouter.ai/automatic-model-selection) *** #### FAQs **Configuration & Setup** **Can I use multiple models with the same API key?** Yes. The API key controls access and budget. Change the Model ID in Cline's settings at any time—no key changes needed. **Can I restrict a key to only use specific models?** Yes. When creating or editing a key, use the **Select Models** setting to limit which models the key can access. FastRouter rejects requests to unauthorized models. **My requests fail after setup. What should I check?** Verify the Base URL is exactly `https://api.fastrouter.ai/api/v1`, the API key is correct, and the Model ID matches a FastRouter catalog slug exactly (including the provider prefix). Also make sure the Cline extension is updated to the latest version. **Costs & Budgeting** **Cline makes many requests per task. How do I keep costs under control?** Set a budget and rate limit on the key you use with Cline. For team rollouts, create separate projects with project-scoped keys, and use Dynamic Tags for finer-grained attribution. The Dashboard breaks down costs by project, key, model, and tag. **What happens when a key exceeds its budget?** FastRouter blocks further requests until the budget resets (if a reset interval is configured) or an admin increases the limit. **Privacy & Security** **Is my code sent to FastRouter's servers?** FastRouter acts as a pass-through gateway. Requests are routed to the model provider and responses are returned to your client. Content logging can be disabled per key for sensitive workloads. See the **Disable Content Logging** option in key settings. *** #### Next Steps * [Explore the full model catalog](https://fastrouter.ai/models) * [Set up Fallback Models](https://docs.fastrouter.ai/fallback-models) for high availability * [Configure Alerts](https://docs.fastrouter.ai/alerts) for spend and performance monitoring * [Run a Free Audit](https://fastrouter.ai/audit) on your existing LLM traffic to identify savings * [Join the Discord community](https://discord.gg/QfTgEtMyyU) --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.fastrouter.ai/integrations/cline.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.