Simple, transparent pricing
Start free. Scale as you grow. All plans include every algorithm, sub-25ms latency, and full API access.
Free
Get started instantly. No credit card required.
Pay-per-call
No monthly commitment. Pay only for what you use. Billed monthly via Stripe.
Starter
For individual developers and side projects.
Growth
For growing teams with production workloads.
Scale
For high-volume applications and enterprise workloads.
Enterprise
Custom limits, dedicated support, and SLA.
x402 USDC Machine Payments
AI agents can pay per API call using USDC on Base via the x402 protocol. No subscription needed -- just include the payment header. Perfect for autonomous agents that need on-demand decision intelligence.
Feature Comparison
| Feature | Free | Pay-per-call | Starter | Growth | Scale | Enterprise |
|---|---|---|---|---|---|---|
| API Access | ||||||
| Monthly API calls | 750 | Unlimited | 10,000 | 100,000 | 1,000,000 | Unlimited |
| Daily rate limit | 25 | 1,000 | ~333 | ~3,333 | ~33,333 | Unlimited |
| Algorithms available | 19 | 19 | 19 | 19 | 19 | 19+ |
| Response time | <25ms | <25ms | <25ms | <25ms | <25ms | <25ms |
| Billing | ||||||
| Monthly subscription | ||||||
| Pay-per-call metering | ||||||
| x402 USDC payments | ||||||
| Authentication | ||||||
| IP-based access | ||||||
| API key (Unkey) | ||||||
| Support | ||||||
| Documentation | ||||||
| Community support | ||||||
| Email support | ||||||
| Priority support | ||||||
| Dedicated support | ||||||
| Slack channel | ||||||
| Features | ||||||
| Usage dashboard | ||||||
| Usage analytics | ||||||
| Webhook notifications | ||||||
| SLA guarantee | ||||||
| Custom algorithms | ||||||
Frequently Asked Questions
Do I need an API key for the free tier?
No. The free tier is rate-limited by IP address. Just call the API directly. No signup, no API key, no credit card.
What happens if I exceed my rate limit?
You'll receive a 429 Too Many Requests response with a Retry-After header. Upgrade your plan for higher limits, switch to pay-per-call metered billing, or use x402 USDC machine payments.
Can I change plans anytime?
Yes. Upgrades are prorated immediately. Downgrades take effect at the end of your billing cycle. You can manage your subscription in the dashboard.
What are x402 USDC payments?
x402 is a machine payment protocol. AI agents can pay $0.01 per API call using USDC on Base L2. No subscription needed -- include the payment header and the call is authorized instantly.
What is pay-per-call billing?
Pay-per-call is Stripe metered billing with no monthly subscription fee. You only pay $0.005 (half a cent) per API call, billed at the end of each month. Perfect if you want to avoid a monthly commitment but need more than the free tier.
Is there a free trial for paid plans?
The free tier is permanently free. Paid plans can be canceled anytime with no commitment. Pay-per-call has zero upfront cost -- you only pay for actual usage.