Your APIs
print money.
Drop a paywall in front of any API. AI agents pay per-call in USDC, settled to your wallet in 2 seconds. Zero code changes. Zero middlemen.
0
API Sellers Registered
0
Paid API Calls Processed
$0
USDC Settled to Sellers
Agents pay. APIs earn. Instantly.
Watch USDC flow from AI agents through four02 to your API endpoints in real time.
four02Revenue you can see growing.
24h Revenue
$0.00
0 paid calls
$0.15
avg price
2.1s
settlement
99.8%
uptime
Total Revenue
$1,892.45
USDC on Base L2
Today
$247.50
HTTP-native
payments.
x402 extends HTTP with a payment layer. When an agent hits a paid endpoint, it receives a402response. The SDK handles the rest automatically — sign, verify, settle, respond.
<50ms
Proxy overhead
~2s
Full settlement
$0.001
CDP cost
Agent calls paid API
Payment Required + x402 challenge
Agent signs USDC payment via CDP
Facilitator verifies on-chain
USDC → Seller wallet on Base
API response returned to agent
Live in under 5 minutes.
No code changes. No smart contracts. No waiting.
Register Your API
Paste your API's base URL into the dashboard. We create a payment proxy in front of it — your origin stays untouched.
Set Your Prices
Configure per-route pricing in USDC. Different prices for different endpoints. Change them anytime from the dashboard.
Get Paid
AI agents pay per-call in USDC, settled directly to your wallet in ~2 seconds. We never touch your funds.
We list it. Agents find it.
When you register a route on four02, we automatically publish it to the x402 Bazaar — the open discovery layer where AI agents search for paid APIs. You set the price, we handle the listing. Agents find you on their own.
You add a route
Register your API endpoint and set a price in the four02 dashboard. That's it — nothing else to configure.
We publish to the Bazaar
four02 automatically lists your endpoint on the x402 Bazaar with pricing, input/output schemas, and metadata.
Agents discover & pay
AI agents query the Bazaar, find your API by what it does, and pay per-call in USDC. No API keys. No sign-ups.
weather-api.gate.dev/v1/forecast
Returns temperature, humidity, wind for a given city
nlp-tools.gate.dev/v1/embeddings
Generates vector embeddings from input text
vision.gate.dev/v1/classify
Classifies images and returns labels with confidence scores
Your API earnings: zero fees.
Proxy infrastructure: simple per-request pricing.
1,000 free requests to get started. After that, pay per request from a prepaid USDC balance.
Launch
$0.005/req
after 1,000 free requests on signup
- 1,000 free requests (one-time signup bonus)
- Unlimited APIs
- Unlimited routes
- Full x402 payment flow
- Bazaar auto-listing
- Direct wallet settlement
- Top up $5 – $500 at a time
Volume
$0.003/req
for high-traffic sellers (50K+ req/mo)
- Everything in Launch
- 40% lower per-request cost
- $100 minimum top-up
- Priority support
- Custom proxy domain
Auto-unlocked with $100+ top-up, or contact us
What it actually costs
5K req/mo
$20
4K paid x $0.005
Launch tier
25K req/mo
$120
24K paid x $0.005
Launch tier
100K req/mo
$297
99K paid x $0.003
Volume tier
Proxy infrastructure fees only. Agent-to-seller payments flow directly on-chain with zero fees.
The agent economy
needs a payment layer.
Start earning in under 5 minutes. No credit card. No smart contracts.
Create Your Account