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Saturn uses a prepaid credit model. Add funds to your wallet, and pay only for what you use.

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How It Works

  1. Add credits via card (USD) or Lightning (sats)
  2. Use capabilities — each call deducts from your balance
  3. Get receipts — every call returns exact cost
No subscriptions. No minimum spend. No surprise bills.

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Adding Credits

const checkout = await saturn.wallet.fundCard({
  amountUsdCents: 1000 // $10 minimum
});
// Opens Stripe checkout
  • Minimum: $10
  • Instant credit after payment
  • Standard card processing fees apply

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Capability Pricing

Pricing varies by capability and provider. Here are typical costs:

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Reason (LLM)

ModelInputOutput
gpt-4o$2.50/M tokens$10.00/M tokens
gpt-4o-mini$0.15/M tokens$0.60/M tokens
claude-sonnet-4-20250514$3.00/M tokens$15.00/M tokens
claude-3-5-haiku$0.25/M tokens$1.25/M tokens
Typical costs:
  • Simple question: 0.001−0.001 - 0.01
  • Long analysis: 0.05−0.05 - 0.20
  • Complex reasoning: 0.10−0.10 - 0.50
ProviderCost per query
Serper~$0.001
Brave~$0.002

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Read / Scrape

ProviderCost per page
Jina~$0.001
Firecrawl~$0.002
ScraperAPI~$0.005

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Execute (Code)

ResourceCost
Base execution~$0.01
Per second of CPU~$0.001

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Imagine (Images)

ModelCost per image
SDXL~$0.01
Stable Diffusion~$0.005

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Speak (TTS)

ProviderCost
ElevenLabs~$0.30 per 1000 characters

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Transcribe (STT)

ProviderCost
Deepgram~$0.01 per minute

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Email / SMS

CapabilityCost
Email (Resend)~$0.001 per email
SMS (US/Canada)~$0.01 per message
SMS (International)~$0.05-0.15 per message

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Getting Exact Pricing

Query the capabilities API for current pricing: 
const capabilities = await saturn.capabilities.list();

for (const cap of capabilities) {
  console.log(`${cap.name}: ${cap.pricing}`);
}
Or check a specific capability: 
const reason = await saturn.capabilities.get('reason');
console.log(reason.providers);
// Shows pricing per provider/model

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Cost Control

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Per-Call Quotes

Every call is quoted before execution: 
const result = await saturn.reason({ prompt: '...' });

console.log({
  quoted: result.metadata.quotedUsdCents,   // Estimated cost
  charged: result.metadata.chargedUsdCents, // Actual cost
});

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Budget Caps

Set spending limits per agent: 
await saturn.policies.update(agentId, {
  maxPerCallUsdCents: 50,    // Max $0.50 per call
  maxPerDayUsdCents: 500,    // Max $5.00 per day
});

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Balance Monitoring

const wallet = await saturn.wallet.get();
console.log(`Balance: $${(wallet.balanceUsdCents / 100).toFixed(2)}`);

if (wallet.balanceUsdCents < 100) {
  console.warn('Low balance - add funds');
}

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Receipt Details

Every call returns a receipt with: 
{
  metadata: {
    chargedUsdCents: 15,      // Actual cost in cents
    chargedSats: 45,          // Actual cost in sats
    quotedUsdCents: 18,       // Pre-quoted estimate
    balanceAfter: 985,        // Remaining credits
    auditId: 'aud_abc123',    // Unique receipt ID
    provider: 'openai',       // Which provider handled it
    latencyMs: 1234,          // Request duration
  }
}

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FAQ

Calls are rejected with CREDIT_EXHAUSTED. No upstream call is made. Add credits to continue.
Unused credits can be refunded. Contact support.
No. Credits don’t expire.
  • Every call returns chargedUsdCents
  • Use saturn.wallet.transactions() for history
  • Dashboard shows per-agent spend
Contact us for enterprise pricing at high volumes.