Pay 10 USDC on Base to participate in the 402onbnb ($402) token sale and claim 50,000 tokens on BSC.
What it does
This x402 endpoint allows a wallet address to participate in the 402onbnb ($402) meme token sale. A single GET request with a valid x402 payment header sends 10 USDC on the Base network to the sale contract, after which the caller receives a confirmation containing their eligible token amount (50,000 $402 tokens), wallet address, payment ID, and verification status. Each wallet address may participate exactly once.
The broader flow is cross-chain: payment is made on Base (using USDC at contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), and the resulting 50,000 $402 tokens are claimable on BSC Mainnet via a separate claim step on the 402bnb.fun website. The fundraising goal is $100,000 USDC. The endpoint uses x402 protocol version 1 with the "exact" payment scheme, meaning the full 10 USDC (10,000,000 in 6-decimal units) is required per call.
No additional documentation, OpenAPI spec, or API reference is provided beyond the landing page and the x402 challenge itself. This is a single-purpose token-sale participation endpoint, not a general-purpose API.
Capabilities
Use cases
- —Participate in the 402onbnb meme token sale by paying 10 USDC on Base
- —Programmatically join a cross-chain token sale via x402 protocol
- —Acquire 50,000 $402 tokens claimable on BSC Mainnet
Fit
Best for
- —Users or agents wanting to participate in the 402onbnb token sale
- —Developers experimenting with x402 protocol payment flows
- —Meme token enthusiasts looking for cross-chain (Base → BSC) token launches
Not for
- —Repeated or bulk purchases (strictly one payment per address)
- —General-purpose payment or API integration — this is a single-purpose sale endpoint
- —Users seeking refundable or reversible transactions
Quick start
# Pay 10 USDC via x402 to participate
curl -X GET https://www.402bnb.fun/api/participate \
-H "X-PAYMENT: <your-x402-payment-header>"Example
Response
{
"message": "Payment verified successfully",
"success": true,
"verified": true,
"paymentId": "abc123-def456",
"timestamp": "2025-01-15T12:00:00.000Z",
"userAddress": "0xYourWalletAddress",
"eligibleTokens": "50000"
}Endpoint
Quality
The x402 challenge is live and includes a well-defined outputSchema with field descriptions. However, there is no OpenAPI spec, no documentation page, no usage examples beyond the landing page, and the endpoint serves a narrow single-purpose token sale rather than a reusable API. The response example is inferred from the outputSchema, not observed.
Warnings
- —Single-purpose token sale endpoint — not a general API; once the fundraising goal is met or the sale ends, this endpoint may become non-functional.
- —No documentation, OpenAPI spec, or terms of service available.
- —One payment per address — duplicate payments will likely fail or be lost.
- —Cross-chain claim step (BSC) is separate and not handled by this endpoint.
- —This is a meme token sale; exercise caution regarding financial risk and regulatory considerations.
- —Response example is inferred from outputSchema, not from an actual observed response.
Citations
- —Payment is 10 USDC on Base network, yielding 50,000 $402 tokens claimable on BSChttps://www.402bnb.fun
- —One payment per address onlyhttps://www.402bnb.fun
- —Fundraising goal is $100,000 USDChttps://www.402bnb.fun
- —x402 challenge returns 402 with maxAmountRequired 10000000 (10 USDC) on Base using exact schemehttps://www.402bnb.fun/api/participate
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://www.402bnb.fun/api/participate
- —Payment recipient is 0x8008639993D305eAF408f185AB22eEd814746F5fhttps://www.402bnb.fun/api/participate