Mint an NFT from the x721 collection on Base via x402 payment protocol
What it does
x721.dev hosts what it describes as the first 10,000-piece NFT collection minted entirely through the x402 payment protocol on the Base network. The single endpoint at `/mint` accepts a GET request with an x402 payment header and, upon successful payment of 40.2 USDC, mints an NFT and returns the caller's user address.
The x402 challenge specifies payment in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base, with a maximum timeout of 60 seconds. The payment recipient is `0x70DA5f2A851FB936eFF8207f2733b0914cC44B7D`. The endpoint is live and returns a standard 402 challenge when called without payment credentials.
Documentation is minimal — there is no OpenAPI spec, no docs page, and no additional API endpoints beyond `/mint`. The root URL returns a JSON object describing the project and linking to x402scan for validation. The collection is also listed on x402scan at the provided link.
Capabilities
Use cases
- —Programmatically mint an NFT from the x721 collection by paying 40.2 USDC via x402
- —Demonstrate x402 protocol integration for NFT minting workflows
- —Agent-driven NFT acquisition on the Base network
Fit
Best for
- —Developers experimenting with x402 payment-gated endpoints
- —AI agents that need to mint NFTs autonomously on Base
- —Collectors interested in the first x402-minted NFT collection
Not for
- —Users looking for free or low-cost NFT minting (costs 40.2 USDC per mint)
- —Applications requiring rich metadata or customizable NFT parameters
- —Production systems needing detailed API documentation or SLAs
Quick start
curl -X GET https://x721.dev/mint \
-H "X-PAYMENT: <x402_payment_header>"Example
Response
{
"user": "0xYourAddressHere"
}Endpoint
Quality
The endpoint is live with a valid 402 challenge and a clear outputSchema, but documentation is essentially nonexistent — no OpenAPI spec, no docs page, and only a brief JSON description at the root. Pricing is clear (40.2 USDC) and the payment scheme is well-defined, but there is no information about the minted NFT (token ID, metadata, contract address) or error handling.
Warnings
- —No documentation available — /docs, /api, /pricing, and /README all return 404
- —Output schema only specifies a 'user' field; no details on the minted NFT token ID or metadata
- —No OpenAPI or machine-readable API specification provided
- —40.2 USDC per mint is a non-trivial cost; verify collection availability before paying
Citations
- —x721.dev describes itself as the first 10,000 NFT collection minted using the 402 protocolhttps://x721.dev
- —Minting costs 40.2 USDC on the Base networkhttps://x721.dev
- —The endpoint returns a 402 challenge requiring USDC payment to 0x70DA5f2A851FB936eFF8207f2733b0914cC44B7Dhttps://x721.dev/mint
- —Compatible with x402scan validation schemahttps://x721.dev