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.

Quickstart

Send your first transaction in under 5 minutes.

API Reference

Full documentation for the Fenra API.

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How It Works

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)

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Supported Providers

OpenAI

All models including gpt-4o, o1, o3, dall-e, whisper

Anthropic

All Claude models including claude-3.5-sonnet, claude-3-opus

Google

All Gemini models including gemini-2.0-flash, gemini-1.5-pro

AWS Bedrock

All Bedrock-hosted models

xAI

All xAI models including grok-beta

DeepSeek

All DeepSeek models including deepseek-chat, deepseek-reasoner

Need a provider we don’t support yet? Use custom and define your own pricing.

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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.

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Start Tracking

Ready to see where your AI budget is actually going?

Quickstart

Get set up in 5 minutes.

View the Dashboard

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