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x402 OpenSea — Pay-per-item Onchain Marketplace Access
x402
x402 OpenSea — Pay-per-item Onchain Marketplace Access is a paid API for AI agents from 402opensea.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-20).
Grants access to a demo digital collectible resource after processing a $0.01 USDC x402 micropayment on the blockchain.
Price / call$0.01
Success—
StatusUnknown
How this service works
Discover digital collectibles and access them with x402 payments in USDC.
Output
Returns a JSON object confirming the x402 payment was accepted, including a success flag (true), the price paid (0.01 USDC), a note clarifying this is demo access content (not proof of NFT ownership), the resource identifier ('demo-collectible-access'), and a message confirming the x402 middleware allowed the request.
Example use cases
Demo x402 micropayment flow
“I want to test how x402 pay-per-item works — can you submit a $0.01 USDC payment to the x402 OpenSea endpoint and show me the access confirmation I get back?”
Unlock collectible for NFT showcase
“Use the x402 OpenSea marketplace to pay for and access the demo collectible resource with USDC — I need to see what content gets unlocked after the payment clears.”
Verify x402 payment middleware works
“Can you confirm that the x402 payment middleware on the OpenSea demo is functioning correctly by sending a $0.01 USDC payment and checking if the success response comes back?”
Technical details
Endpoint
POSThttps://402opensea.vercel.app/api/paid?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to demonstrate or test x402 micropayment-gated access to digital collectible content using USDC on a live endpoint. It is ideal for prototyping pay-per-item NFT access flows, verifying x402 middleware behavior, or showcasing onchain payment gating in a demo context. Not suitable for verifying actual NFT ownership or accessing real OpenSea marketplace inventory.
Side effects
- Payment not included or malformed x402 header — returns 402 Payment Required
- Insufficient USDC balance — payment rejected before access granted
- Network or Vercel deployment downtime — returns 502/503
- Invalid or expired payment — middleware rejects and returns error
Output
Schema · Response
{
"type": "json",
"example": {
"note": "Demo access content, not proof of NFT ownership.",
"price": "0.01 USDC",
"message": "The x402 payment middleware allowed this request.",
"success": true,
"resource": "demo-collectible-access"
}
}Tags
x402
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