{"id":"8b04e25c-a6db-47a7-bf0a-bea80586f957","shortId":"AbnmBH","kind":"x402","title":"Pay 10 USDC on Base to participate in the 402onbnb ($402) token sale and claim 50,000 tokens on BSC.","tagline":"Pay 10 USDC on Base to participate in the 402onbnb ($402) token sale and claim 50,000 tokens on BSC.","description":"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.\n\nThe 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.\n\nNo 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.","tags":[],"capabilities":["x402-payment","token-sale-participation","cross-chain-base-to-bsc","one-payment-per-address","usdc-on-base"],"categories":["crypto","token-sale"],"synonyms":["402onbnb","402 token sale","meme token sale","USDC token purchase","x402 token launch","BSC token claim","Base USDC payment"],"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."],"endpointUrl":"https://www.402bnb.fun/api/participate","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x8008639993D305eAF408F185AB22eEd814746F5f","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://www.402bnb.fun/api/participate","description":"Pay 10 USDC to participate in 402onbnb token sale (one payment per address only)","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true},"output":{"input":{"type":"http","method":"GET"},"output":{"type":"object","properties":{"message":{"type":"string","required":false,"description":"Response message"},"success":{"type":"boolean","required":true,"description":"Whether payment succeeded"},"verified":{"type":"boolean","required":false,"description":"Whether payment was verified"},"paymentId":{"type":"string","required":false,"description":"Payment record ID"},"timestamp":{"type":"string","required":false,"description":"ISO timestamp of payment"},"userAddress":{"type":"string","required":false,"description":"User wallet address"},"eligibleTokens":{"type":"string","required":false,"description":"Amount of tokens claimable (50000 $402 tokens)"}}}}},"maxAmountRequired":"10000000","maxTimeoutSeconds":300}]},"qualityScore":"0.500","qualityRationale":"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 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'0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':124 '1':159 '10':2,22,68,168,170 '100':150 '402':11,31,53,92,130 '402 token sale' '402bnb.fun':144 '402onbnb':10,30,52 '50':16,36,90,128 '6':174 'BSC token claim' 'Base USDC payment' 'USDC token purchase' 'addit':182 'address':47,95,103 'allow':44 'amount':89 'api':187,216 'base':5,25,72,119 'beyond':191 'broader':109 'bsc':20,40,135 'call':180 'caller':81 'chain':114 'challeng':198 'claim':15,35,140 'claimabl':133 'confirm':84 'contain':85 'contract':77,123 'cross':113 'cross-chain':112 'cross-chain-base-to-bsc' 'decim':175 'document':183 'elig':87 'endpoint':43,154,210 'exact':106,162 'flow':110 'full':167 'fundrais':147 'general':214 'general-purpos':213 'get':59 'goal':148 'header':66 'id':97 'land':193 'made':117 'mainnet':136 'may':104 'mean':165 'meme':54 'meme token sale' 'network':73 'one-payment-per-address' 'openapi':184 'page':194 'particip':7,27,49,105,209 'pay':1,21 'payment':65,96,115,163 'per':179 'protocol':157 'provid':190 'purpos':205,215 'receiv':82 'refer':188 'request':60 'requir':178 'result':127 'sale':13,33,56,76,208 'scheme':164 'send':67 'separ':139 'singl':58,204 'single-purpos':203 'spec':185 'status':100 'step':141 'token':12,18,32,38,55,88,93,131,207 'token-sal':206 'token-sale-participation' 'unit':176 'usdc':3,23,69,121,152,169 'usdc-on-base' 'use':120,155 'valid':63 'verif':99 'version':158 'via':137 'wallet':46,94,102 'websit':145 'x402':42,64,156,197 'x402 token launch' 'x402-payment'","prices":[{"id":"75561667-c4c9-4edb-b89f-3c8dded290f9","listingId":"8b04e25c-a6db-47a7-bf0a-bea80586f957","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":"10000000","chain":"base","payTo":"0x8008639993D305eAF408F185AB22eEd814746F5f","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x8008639993D305eAF408F185AB22eEd814746F5f","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://www.402bnb.fun/api/participate","description":"Pay 10 USDC to participate in 402onbnb token sale (one payment per address only)","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true},"output":{"input":{"type":"http","method":"GET"},"output":{"type":"object","properties":{"message":{"type":"string","required":false,"description":"Response message"},"success":{"type":"boolean","required":true,"description":"Whether payment succeeded"},"verified":{"type":"boolean","required":false,"description":"Whether payment was verified"},"paymentId":{"type":"string","required":false,"description":"Payment record ID"},"timestamp":{"type":"string","required":false,"description":"ISO timestamp of payment"},"userAddress":{"type":"string","required":false,"description":"User wallet address"},"eligibleTokens":{"type":"string","required":false,"description":"Amount of tokens claimable (50000 $402 tokens)"}}}}},"maxAmountRequired":"10000000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:31:41.217Z"}],"sources":[{"listingId":"8b04e25c-a6db-47a7-bf0a-bea80586f957","source":"x402_bazaar","sourceId":"https://www.402bnb.fun/api/participate","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:31:41.217Z","lastSeenAt":"2026-04-24T21:30:26.499Z"}],"details":{"listingId":"8b04e25c-a6db-47a7-bf0a-bea80586f957","quickStartSnippet":"# Pay 10 USDC via x402 to participate\ncurl -X GET https://www.402bnb.fun/api/participate \\\n  -H \"X-PAYMENT: <your-x402-payment-header>\"","exampleRequest":null,"exampleResponse":{"message":"Payment verified successfully","success":true,"verified":true,"paymentId":"abc123-def456","timestamp":"2025-01-15T12:00:00.000Z","userAddress":"0xYourWalletAddress","eligibleTokens":"50000"},"schema":{"input":{"type":"http","method":"GET","discoverable":true},"output":{"input":{"type":"http","method":"GET"},"output":{"type":"object","properties":{"message":{"type":"string","required":false,"description":"Response message"},"success":{"type":"boolean","required":true,"description":"Whether payment succeeded"},"verified":{"type":"boolean","required":false,"description":"Whether payment was verified"},"paymentId":{"type":"string","required":false,"description":"Payment record ID"},"timestamp":{"type":"string","required":false,"description":"ISO timestamp of payment"},"userAddress":{"type":"string","required":false,"description":"User wallet address"},"eligibleTokens":{"type":"string","required":false,"description":"Amount of tokens claimable (50000 $402 tokens)"}}}}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Payment is 10 USDC on Base network, yielding 50,000 $402 tokens claimable on BSC","source_url":"https://www.402bnb.fun"},{"claim":"One payment per address only","source_url":"https://www.402bnb.fun"},{"claim":"Fundraising goal is $100,000 USDC","source_url":"https://www.402bnb.fun"},{"claim":"x402 challenge returns 402 with maxAmountRequired 10000000 (10 USDC) on Base using exact scheme","source_url":"https://www.402bnb.fun/api/participate"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://www.402bnb.fun/api/participate"},{"claim":"Payment recipient is 0x8008639993D305eAF408f185AB22eEd814746F5f","source_url":"https://www.402bnb.fun/api/participate"}],"useCases":["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"],"bestFor":["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"],"notFor":["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"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:05.253Z"},"updatedAt":"2026-04-24T21:30:26.499Z"}}