Compute Credits

System R AI is usage-based. All 68 tools are free. You only pay when an LLM is used. One account balance shared across all your API keys.

• All 68 MCP tools are FREE — no balance needed
• LLM usage billed per use, cost varies by query complexity
• Balance at $0 = LLM usage stops. Free tools keep working.
• Credits never expire

Add credits

Card (Stripe)

The simplest way. Pay with any credit or debit card. $5 minimum, $10,000 maximum.

From the portal: app.systemr.ai/billing

Via API:

curl -X POST https://agents.systemr.ai/v1/billing/checkout \
  -H "X-API-Key: sr_agent_..." \
  -H "Content-Type: application/json" \
  -d '{"amount": 50}'

Crypto

Send tokens to the treasury wallet on Solana mainnet. Credits added instantly after verification.

Treasury wallet: 9Nc6u9ft3uAr6DSaqHijFjQS53hZPDRL2LoVYvH4vK5H

What gets billed

All 68 MCP tools — FREE

All tools — position sizing, risk checks, Monte Carlo, Kelly, drawdown analysis, pattern detection, market data, memory, delegation, and more — are completely free. No balance required.

LLM usage

When an LLM is used, your balance is deducted based on query complexity. System R picks the optimal model for each request automatically — no model selection needed, no configuration required.

How billing works per call

1. You call a tool or send a chat message
2. Free tools execute immediately — no balance check
3. For paid operations (market data, chat, research): system checks your account balance
4. If sufficient: operation executes, cost deducted, result returned
5. If insufficient: HTTP 402 returned. No deduction, no execution.
6. Transaction logged in audit trail

OSR payments receive 50% bonus credits — the best value on the platform.

Per-key limits

Set spending caps per API key from the Dashboard:

• Daily limit — max spend per day for this key
• Monthly limit — max spend per month for this key
• Allowed operations — restrict which tools this key can call

All keys share one account balance. Limits protect against runaway usage.

Check balance

curl https://agents.systemr.ai/v1/billing/balance \
  -H "X-API-Key: sr_agent_..."

{
  "balance": "42.50",
  "is_low": false,
  "updated_at": "2026-03-31T12:00:00Z"
}

View usage

curl https://agents.systemr.ai/v1/billing/usage \
  -H "X-API-Key: sr_agent_..."

Returns usage grouped by operation type with call count and total cost.

View transactions

curl https://agents.systemr.ai/v1/billing/transactions?limit=20 \
  -H "X-API-Key: sr_agent_..."

Returns all credits, deductions, and deposits with timestamps.