What AI APIs does Synthesized support?

Synthesized supports OpenAI (GPT-4, GPT-3.5), Anthropic Claude, and Google Gemini APIs with real-time cost tracking.

How does real-time cost tracking work?

Synthesized acts as a proxy for your AI API calls, tracking every request and calculating costs in real-time based on token usage and current pricing.

Can I set budget alerts?

Yes, you can set custom budget alerts for projects and receive notifications when spending thresholds are reached.

How does Synthesized work?

Synthesized works as a proxy between your application and the API provider (OpenAI, Claude, or Gemini). You only change the base URL in your code, and all requests are automatically tracked and categorized.

Which models are supported?

Synthesized supports OpenAI models, Claude models and Gemini models. All future models are automatically supported.

How much additional latency is there?

The proxy layer is optimized for minimal latency. The additional delay is typically under 50ms.

Are my API keys secure?

Yes, all API keys are stored encrypted and never displayed in plain text. The connection to all API providers (OpenAI, Claude, and Gemini) is exclusively via HTTPS.

Start free – no credit card required

Stop Guessing.
Start Knowing.

Track every AI API dollar in real-time. Get alerts before costs explode. One line of code, zero surprises.

See how it works

100%

Transparency

<50ms

Latency

0€

Surprises

Everything you need to stay in control

No bloat. Just what matters.

Real-time Cost Dashboard

See exactly what you're spending – right now, not next month.

Per-Project Tracking

Know exactly which project burns through your budget.

Smart Budget Alerts

Get warned at 80%. Get blocked at 100%. Sleep better at night.

5-Minute Setup

Change one URL. That's it. Works with your existing code.

Complete Request History

Every call logged. Debug faster. Optimize smarter.

Built for Speed

<50ms overhead. Your users won't notice. Your wallet will.

Ready in 3 minutes

No SDK. No dependencies. No complexity.

Create project

Create a project and give it a name. E.g. 'Production API' or 'Dev Testing'.

Add API key

Add your OpenAI, Claude, or Gemini API key. You'll receive a proxy key from us.

Change base URL

Replace the API base URL with ours. That's it.

// Before
const client = new OpenAI({
  apiKey: 'sk-...'
});

// After
const client = new OpenAI({
  apiKey: 'syn_...', // Your Proxy Key
  baseURL: 'https://synthesized.app/api/proxy'
});

Simple, honest pricing

Try free for 7 days. No credit card. Cancel anytime.

SOLO

Perfect for indie hackers and solo founders shipping fast.

29€/mo

2 projects
1 API key per provider
Track up to €20/month in API costs
30-day cost history
Automatic alerts at 80% and 100%

PRO

For growing SaaS products with multiple environments.

59€/mo

10 projects
5 API keys per provider
Track up to €100/month in API costs
90-day cost history
CSV export for accounting
Project-specific budget controls

TEAM

For teams who need full visibility and control.

99€/mo

20 API keys per provider
Track up to €300/month in API costs
6-month cost history
Invite your whole team
Priority processing
Unlimited projects
Unlimited requests
1-year request history
Priority support

All prices plus applicable VAT.

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