Simple, transparent pricing

Start free. Pay only for what you use. Credits never expire.

Free
$0
10 calls/day · no credit card
  • 10 API calls per day
  • Basic AI tools (ask, summarize, translate)
  • 15 frontier models
  • No API key needed
  • MCP & REST access
  • Priority support
  • Higher rate limits
Get Started Free
Starter
$5 prepaid
~830 calls · $0.006/call
  • ~830 prepaid API calls
  • All 244 tools unlocked
  • 15 frontier models
  • Personal API key
  • MCP & REST access
  • Priority support
  • Higher rate limits
Buy Credits →
Best Value
Pro
$20 prepaid
~4,000 calls · $0.005/call · 20% off
  • ~4,000 prepaid API calls
  • All 244 tools unlocked
  • 15 frontier models
  • Personal API key
  • MCP & REST access
  • Premium support
  • 600 req/min rate limit
Buy Credits →
Enterprise
Custom
Volume pricing · SLAs · dedicated support
  • Custom call volume
  • All 244 tools unlocked
  • Custom model routing
  • Dedicated API key
  • Dedicated support channel
  • Custom rate limits
  • SLA guarantees
Contact Us
// Feature Comparison
Feature Free Starter ($5) Pro ($20) Enterprise
API calls 10/day ~830 prepaid ~4,000 prepaid Custom
AI tools available Basic set All 244 All 244 All 244
Models (Claude, GPT-4o, Gemini, etc.) 15 models 15 models 15 models 15+ models
MCP & REST access ✓ ✓ ✓ ✓
Agent builder — ✓ ✓ ✓
Memory & context — ✓ ✓ ✓
Rate limit 60/min 600/min 600/min Custom
Support Community Priority Premium Dedicated
Cost per call Free $0.006 $0.005 Volume discount
Credits expire? N/A Never Never Never
SLA — — — ✓

Paid tiers use prepaid credits, not daily limits. Call counts shown are approximate totals at each credit level.

// Three Ways to Pay

API Key (Stripe)

Buy a prepaid key with a credit card. Use it in any request via Authorization: Bearer apk_xxx. Top up anytime. Instant activation.

x402 USDC (Crypto)

Native HTTP 402 micropayments. Send USDC on Base, Solana, or Stellar. No account needed — pay per request via the x402 V2 protocol.

Free Tier

No auth needed. 10 calls/day per IP. Just POST JSON to any endpoint. Perfect for testing and prototyping before committing.

// Frequently Asked Questions
x402 V2 is an open payment protocol based on HTTP status code 402 (Payment Required). When you call an API endpoint, the server returns a 402 response with a PAYMENT-REQUIRED header containing payment instructions — wallet address, amount, and supported chains (Base, Solana, Stellar). Your agent signs a USDC payment and attaches it as a PAYMENT-SIGNATURE header. The server verifies via a facilitator and returns your result instantly. It enables truly autonomous, pay-per-use AI without subscriptions or API keys.
AiPayGen uses prepaid credits, not subscriptions. Buy credits with a credit card via Stripe — you get an API key and each call deducts from your balance. No recurring charges, no surprise bills. You also get a 20% bulk discount when your balance is $2 or more. Alternatively, use x402 USDC micropayments to pay per call with crypto — no API key needed.
Prepaid API credits are non-refundable once purchased, as they are consumed per-call. If you experience billing issues or errors, contact us at [email protected] and we will work with you to resolve it.
Your API key still works, but calls return a 402 Payment Required response until you top up. You can fall back to the free tier (10 calls/day) without any key. No data is lost — your memory, skills, and configurations persist.
No. Prepaid credits never expire. Use them at your own pace.
15 frontier models across 7 providers: Claude (Anthropic), GPT-4o & GPT-4o-mini (OpenAI), Gemini 2.0 & 1.5 (Google), DeepSeek V3 & R1, Llama 3, Mistral, and more. Pass a model parameter to choose, or let AiPayGen route automatically for best results.
No. AiPayGen uses prepaid credits, not subscriptions. Buy once, use whenever. No recurring charges.
Yes. AiPayGen has a seller marketplace where you can list your own API endpoints. You set the price, we handle payments and distribution. Sellers receive 85% of revenue, paid out in USDC.
The fastest way: pip install aipaygen-mcp and add it to your MCP client (Claude Code, Cursor, Windsurf). You get 10 free calls per day with no sign-up. For higher volume, buy credits to get an API key.

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