Verified by a-un (30 days)

a-un buys your x402 service every week with a real USDC payment and publishes a dated, tamper-evident receipt: verdict, SHA-256 of what it delivered, response shape and the Base transaction. Directories only check the 402; this proves the paid call delivers.

Price$9 USDC

Paymentx402 · Base

AccountNot needed

If it failsNot charged

Who it is for

x402 sellers who want buyers to trust their service.

Show the «✓ Verified by a-un» badge and be listed first
Have public proof that your service delivers
Know the week it stops delivering

How an agent buys it

POST https://a-upgradenet.com/x402/verify-seller
Content-Type: application/json

{
  "listing_id": "xd_abc123def456"
}

1) Answers 402 with the price (PAYMENT-REQUIRED)
2) The agent signs the payment (EIP-3009, USDC on Base) and repeats with PAYMENT-SIGNATURE
3) Receives the result + PAYMENT-RESPONSE

Example response

{
  "status": "completed",
  "listing_id": "xd_abc123def456",
  "plan": "weekly_30d",
  "active_until": "2026-12-13T16:00:00.000Z",
  "next_check": "within 24 hours, then weekly",
  "receipts": "https://a-upgradenet.com/verified/rc_…",
  "price_usdc": 9
}

Full documentation → See all products