{"id":"277cb359-bf71-4162-9d18-d33c3e26290d","shortId":"8A8BGr","kind":"x402","title":"Buy Shiba tokens (0x0E8e…1f08b07) with a custom USDC amount via x402 payment.","tagline":"Buy Shiba tokens (0x0E8e…1f08b07) with a custom USDC amount via x402 payment.","description":"This x402-enabled endpoint at shiba.x420.dev allows callers to purchase a custom USDC amount worth of Shiba tokens (contract 0x0E8ef9f6355566E91B0F4903d11ae1bDE1F08b07) on Base. The token was created via Clanker and is listed on clanker.world. The site refers to the purchase action as a \"Puff\" — users specify a USDC amount and the endpoint executes a swap into Shiba tokens.\n\nThe endpoint is part of the x420.dev platform, which appears to host token-specific subdomains with x402 payment integration. No OpenAPI schema, formal documentation, or pricing page is available — the /docs, /api, /pricing, and /README paths all return placeholder pages. The probe did not receive a 402 challenge from the endpoint (HTTP 405 was returned instead), so the endpoint's current operational status is uncertain. Activity can be tracked via x402scan.com for the associated recipient address 0x93109d14f6665a9c9675290d3cd5a6c07bbafdbd.\n\nGiven the lack of documentation, schema, and a successful 402 challenge, this listing should be treated as a stub. Callers should verify the endpoint is live and review on-chain details before transacting.","tags":[],"capabilities":["token-swap","usdc-payment","x402-protocol","base-chain","clanker-token"],"categories":["crypto","defi"],"synonyms":["shiba token buy","USDC to Shiba swap","x402 token purchase","clanker token swap","puff shiba","x420 shiba","shiba x420"],"warnings":["Endpoint returned HTTP 405 instead of a 402 challenge during probing — may not be operational or may require a different HTTP method.","No API documentation, OpenAPI spec, or schema is available.","All documentation paths (/docs, /api, /pricing, /README) return 'doesn't exist' placeholder pages.","This involves purchasing a meme token — high financial risk; do your own research.","Request/response examples are entirely inferred and unverified."],"endpointUrl":"https://shiba.x420.dev/api/puff-custom","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x93109d14F6665a9c9675290D3cD5A6c07bBAfdbd","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://shiba.x420.dev/api/puff-custom","description":"Buy custom USDC amount worth of Shiba tokens 0x0E8ef9f6355566E91B0F4903d11ae1bDE1F08b07","outputSchema":{"input":{"type":"http","method":"POST","bodyType":"json","bodyFields":{"amount":{"type":"string","required":false,"description":"Optional amount in USDC (e.g., '10', '10.5', '0.5'). Defaults to 5 if not provided."}}},"output":{"message":"string","tokensReceived":"string","usdcAmountPaid":"string","sendTransactionHash":"string | null","swapTransactionHash":"string | null"}},"maxAmountRequired":"5000000","maxTimeoutSeconds":120}]},"qualityScore":"0.150","qualityRationale":"No OpenAPI schema, no documentation, no successful 402 challenge (405 returned), and all doc/api/pricing paths are placeholder pages. The listing is effectively a stub inferred from the landing page UI and the existing 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'/docs':116 '/pricing':118 '/readme':120 '0x0e8e':4,17 '0x0e8ef9f6355566e91b0f4903d11ae1bde1f08b07':47 '0x93109d14f6665a9c9675290d3cd5a6c07bbafdbd':162 '1f08b07':5,18 '402':132,172 '405':138 'USDC to Shiba swap' 'action':67 'activ':151 'address':161 'allow':34 'amount':10,23,41,75 'appear':94 'associ':159 'avail':114 'base':49 'base-chain' 'buy':1,14 'caller':35,182 'chain':193 'challeng':133,173 'clanker':55 'clanker token swap' 'clanker-token' 'clanker.world':60 'contract':46 'creat':53 'current':146 'custom':8,21,39 'detail':194 'document':109,167 'enabl':30 'endpoint':31,78,86,136,144,186 'execut':79 'formal':108 'given':163 'host':96 'http':137 'instead':141 'integr':104 'lack':165 'list':58,175 'live':188 'on-chain':191 'openapi':106 'oper':147 'page':112,125 'part':88 'path':121 'payment':13,26,103 'placehold':124 'platform':92 'price':111 'probe':127 'puff':70 'puff shiba' 'purchas':37,66 'receiv':130 'recipi':160 'refer':63 'return':123,140 'review':190 'schema':107,168 'shiba':2,15,44,83 'shiba token buy' 'shiba x420' 'shiba.x420.dev':33 'site':62 'specif':99 'specifi':72 'status':148 'stub':181 'subdomain':100 'success':171 'swap':81 'token':3,16,45,51,84,98 'token-specif':97 'token-swap' 'track':154 'transact':196 'treat':178 'uncertain':150 'usdc':9,22,40,74 'usdc-payment' 'user':71 'verifi':184 'via':11,24,54,155 'worth':42 'x402':12,25,29,102 'x402 token purchase' 'x402-enabled':28 'x402-protocol' 'x402scan.com':156 'x420 shiba' 'x420.dev':91","prices":[{"id":"b37333ca-f13b-420f-b2e6-d4097aecebaa","listingId":"277cb359-bf71-4162-9d18-d33c3e26290d","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":"5000000","chain":"base","payTo":"0x93109d14F6665a9c9675290D3cD5A6c07bBAfdbd","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x93109d14F6665a9c9675290D3cD5A6c07bBAfdbd","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://shiba.x420.dev/api/puff-custom","description":"Buy custom USDC amount worth of Shiba tokens 0x0E8ef9f6355566E91B0F4903d11ae1bDE1F08b07","outputSchema":{"input":{"type":"http","method":"POST","bodyType":"json","bodyFields":{"amount":{"type":"string","required":false,"description":"Optional amount in USDC (e.g., '10', '10.5', '0.5'). Defaults to 5 if not provided."}}},"output":{"message":"string","tokensReceived":"string","usdcAmountPaid":"string","sendTransactionHash":"string | null","swapTransactionHash":"string | null"}},"maxAmountRequired":"5000000","maxTimeoutSeconds":120}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":120},"createdAt":"2026-04-18T18:30:28.338Z"}],"sources":[{"listingId":"277cb359-bf71-4162-9d18-d33c3e26290d","source":"x402_bazaar","sourceId":"https://shiba.x420.dev/api/puff-custom","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:30:28.338Z","lastSeenAt":"2026-04-23T05:00:33.447Z"}],"details":{"listingId":"277cb359-bf71-4162-9d18-d33c3e26290d","quickStartSnippet":"# No formal schema available. Based on the UI, the endpoint expects a USDC amount.\n# Example (hypothetical — verify with a real x402 client):\ncurl -X POST https://shiba.x420.dev/api/puff-custom \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"amount\": \"5.00\"}'","exampleRequest":{"amount":"5.00"},"exampleResponse":null,"schema":{"input":{"type":"http","method":"POST","bodyType":"json","bodyFields":{"amount":{"type":"string","required":false,"description":"Optional amount in USDC (e.g., '10', '10.5', '0.5'). Defaults to 5 if not provided."}}},"output":{"message":"string","tokensReceived":"string","usdcAmountPaid":"string","sendTransactionHash":"string | null","swapTransactionHash":"string | null"}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Shiba token contract address is 0x0E8ef9f6355566E91B0F4903d11ae1bDE1F08b07, created via Clanker by 0x336A...0514","source_url":"https://shiba.x420.dev"},{"claim":"Activity can be tracked on x402scan.com for recipient 0x93109d14f6665a9c9675290d3cd5a6c07bbafdbd","source_url":"https://shiba.x420.dev"},{"claim":"The endpoint returned HTTP 405 instead of a 402 challenge during probing","source_url":"https://shiba.x420.dev/api/puff-custom"},{"claim":"Documentation paths /docs, /api, /pricing, /README all return placeholder pages","source_url":"https://shiba.x420.dev/docs"}],"useCases":["Programmatically purchasing Shiba tokens with USDC via an x402 payment flow","Agents autonomously swapping USDC for meme tokens on Base","Integrating token purchases into automated trading or portfolio strategies"],"bestFor":["AI agents that need to autonomously buy tokens via x402","Developers experimenting with x402 payment protocol for token swaps","Users wanting a simple API-based token purchase without a DEX frontend"],"notFor":["Production trading systems requiring documented, stable APIs","Users needing detailed order book or limit order functionality","Anyone requiring formal SLAs or uptime guarantees"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:35.179Z"},"updatedAt":"2026-04-23T05:00:33.447Z"}}