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x402-deals Coupon Verification API
x402
x402-deals Coupon Verification API is a paid API for AI agents from x402-deals-production.up.railway.app, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-17).
Verifies whether a coupon or promo code is valid for a given merchant, using freshness-verified deal data, paid per-call via x402 micropayment
Price / call$0.02
Success—
StatusUnknown
How this service works
Pay-per-call API selling freshness-verified deal data. Coupon code verification and daily re-verified free-product offers. $0.02 USDC per call via x402 v2 (exact scheme) on Base mainnet (eip155:8453). No account, no API key.
Output
Returns a verification result object indicating whether the supplied coupon or promo code is valid for the specified merchant, along with any available deal details such as discount value, expiry, or offer type. Data is freshness-verified and re-checked daily.
Example use cases
Pre-checkout coupon validation
“Before I complete my order at Adidas, can you verify whether the coupon code ADICLUB15 is still active and usable?”
Savings agent deal check
“I'm trying to use the code FREESHIP50 at Target — can you confirm it's still a working promo code before I waste time at checkout?”
Deal aggregator freshness check
“Check if the promo code SUMMER30 is still valid at Old Navy — I need to know if it's genuinely working before recommending it to users.”
Technical details
Endpoint
GEThttps://x402-deals-production.up.railway.app/v1/coupons/verify?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need real-time, freshness-verified coupon code validation without signing up for an account or API key — ideal for agents that need lightweight per-call verification with micropayment billing via x402 on Base. Prefer this over scraping-based alternatives when you need confirmed validity data that is re-verified daily.
Side effects
- Invalid or expired coupon code returns a negative validity status
- Unknown merchant name may result in an error or unverifiable response
- Network or payment failure via x402 protocol prevents the call from completing
- Malformed request missing required 'code' or 'merchant' fields returns a validation error
- Coupon code valid in one region but not another may cause inconsistent results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| coderequired | string | Promo/coupon code to verify |
| merchantrequired | string | Merchant name, e.g. nike |
Output
Schema · Response
{
"type": "object"
}Tags
x402
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