> ## Documentation Index > Fetch the complete documentation index at: https://docs.fenra.io/llms.txt > Use this file to discover all available pages before exploring further. # Fenra > AI usage and cost tracking for teams that ship fast You're shipping AI features. Your OpenAI bill tripled last month. Someone asks which feature is responsible, and you have no idea. Fenra has your back. ## One API Call. Complete Visibility. Send your AI usage to Fenra after each provider call. We handle the rest: * **Automatic cost calculation**: No spreadsheets, no manual lookups. We know every provider's pricing. * **Feature-level breakdown**: See exactly which features, users, and environments drive your costs. * **Multi-provider support**: OpenAI, Anthropic, Google, Bedrock, xAI, DeepSeek. One dashboard for all of them. * **Privacy by design**: We never store your prompts or outputs. Only usage context. Send your first transaction in under 5 minutes. Full documentation for the Fenra API. *** ## How It Works ```mermaid theme={null} sequenceDiagram participant App as Your App participant AI as AI Provider participant Fenra as Fenra participant Dashboard as Dashboard App->>AI: API Call AI-->>App: Response + Usage App->>Fenra: Send Usage Data Fenra-->>App: 202 Accepted Fenra->>Dashboard: Cost Calculated ``` After your AI provider returns a response, extract the usage data and send it to Fenra. The ingest endpoint is designed for hot paths: it responds in 20-40ms, returns a `202 Accepted` immediately, and processes asynchronously. No blocking, no performance impact on your application. **No prompts or outputs are ever stored.** We only track: * Token counts (input, output, cached, reasoning) * Model and provider * Your custom context (feature, environment, user) *** ## Supported Providers All models including gpt-4o, o1, o3, dall-e, whisper All Claude models including claude-3.5-sonnet, claude-3-opus All Gemini models including gemini-2.0-flash, gemini-1.5-pro All Bedrock-hosted models All xAI models including grok-beta All DeepSeek models including deepseek-chat, deepseek-reasoner Need a provider we don't support yet? Use `custom` and define your own pricing. *** ## What You Can Do ### Track Costs in Real-Time Every transaction is processed and costs are calculated within seconds. See your spending as it happens, not at the end of the month. ### Break Down by Anything Group costs by any context you send: feature, environment, model, user, or any custom field. ### Get Alerts Before You Get Burned Set spending thresholds and get notified before costs spiral. ### Generate Reports On-demand or scheduled. CSV exports ready for your team or data pipelines. *** ## Start Tracking Ready to see where your AI budget is actually going? Get set up in 5 minutes. Sign in to your account.