{"id":"5be758f1-2b6b-419e-b567-abefc5b04b8f","shortId":"eeeKbR","kind":"x402","title":"Buy a custom USDC amount of DEV tokens (0x64a3…1b07) via x402 payment on Base.","tagline":"Buy a custom USDC amount of DEV tokens (0x64a3…1b07) via x402 payment on Base.","description":"This x402-enabled endpoint on the x420.dev platform lets callers spend a custom USDC amount to purchase DEV tokens (contract 0x64a3fc16f47d5c39D526eF40adEcc8C050751b07). The DEV token was created via Clanker and is associated with the \"adevcooks\" project. The endpoint is hosted at dev.x420.dev and is part of the x420 ecosystem, which wraps Clanker-launched tokens with x402 payment-gated actions.\n\nThe site exposes a \"Puff\" action where users enter a USDC amount and execute a token purchase. Clanker reward claiming (WETH) is also referenced on the landing page. However, documentation is essentially nonexistent — the /docs, /api, /pricing, and /README paths all return placeholder pages stating the subdomain hasn't been fully created. No OpenAPI schema, no formal API documentation, and no pricing details beyond the USDC-denominated input are available. The probe did not receive a standard 402 challenge from the endpoint (HTTP 405 was returned instead), raising questions about the current operational status of this specific route.\n\nBecause of the lack of documentation, schema, and the 405 response on probe, this listing should be treated as experimental. Users and agents should verify endpoint availability before relying on it in production workflows.","tags":[],"capabilities":["token-purchase","usdc-payment","x402-gated","base-chain","clanker-token","custom-amount"],"categories":["crypto","defi"],"synonyms":["buy DEV token","x420 puff","USDC to DEV swap","clanker token purchase","x402 token buy","adevcooks token","DEV token x402"],"warnings":["Probe returned HTTP 405, not 402 — endpoint may not be operational or may require specific request format","No documentation exists: /docs, /api, /pricing, /README all return 'doesn't exist' pages","No OpenAPI or schema available; request/response formats are entirely inferred","Token purchase endpoints involve financial transactions — verify independently before use","The DEV token is a Clanker-launched token with unknown liquidity and risk profile"],"endpointUrl":"https://dev.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://dev.x420.dev/api/puff-custom","description":"Buy custom USDC amount worth of DEV tokens 0x64a3fc16f47d5c39D526eF40adEcc8C050751b07","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 API documentation, no OpenAPI schema, no examples, and the probe returned HTTP 405 instead of a 402 challenge. The /docs, /api, /pricing, and /README pages are all non-functional placeholders. Nearly all listing details are inferred from the landing page UI and existing 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'/docs':126 '/pricing':128 '/readme':130 '0x64a3':9,24 '0x64a3fc16f47d5c39d526ef40adecc8c050751b07':52 '1b07':10,25 '402':170 '405':176,200 'DEV token x402' 'USDC to DEV swap' 'action':91,97 'adevcook':65 'adevcooks token' 'agent':213 'also':114 'amount':5,20,46,103 'api':149 'associ':62 'avail':162,217 'base':15,30 'base-chain' 'beyond':155 'buy':1,16 'buy DEV token' 'caller':41 'challeng':171 'claim':111 'clanker':59,83,109 'clanker token purchase' 'clanker-launch':82 'clanker-token' 'contract':51 'creat':57,143 'current':184 'custom':3,18,44 'custom-amount' 'denomin':159 'detail':154 'dev':7,22,49,54 'dev.x420.dev':72 'document':121,150,196 'ecosystem':79 'enabl':34 'endpoint':35,68,174,216 'enter':100 'essenti':123 'execut':105 'experiment':210 'expos':94 'formal':148 'fulli':142 'gate':90 'hasn':139 'host':70 'howev':120 'http':175 'input':160 'instead':179 'lack':194 'land':118 'launch':84 'let':40 'list':205 'nonexist':124 'openapi':145 'oper':185 'page':119,135 'part':75 'path':131 'payment':13,28,89 'payment-g':88 'placehold':134 'platform':39 'price':153 'probe':164,203 'product':223 'project':66 'puff':96 'purchas':48,108 'question':181 'rais':180 'receiv':167 'referenc':115 'reli':219 'respons':201 'return':133,178 'reward':110 'rout':190 'schema':146,197 'site':93 'specif':189 'spend':42 'standard':169 'state':136 'status':186 'subdomain':138 'token':8,23,50,55,85,107 'token-purchase' 'treat':208 'usdc':4,19,45,102,158 'usdc-denomin':157 'usdc-payment' 'user':99,211 'verifi':215 'via':11,26,58 'weth':112 'workflow':224 'wrap':81 'x402':12,27,33,87 'x402 token buy' 'x402-enabled':32 'x402-gated' 'x420':78 'x420 puff' 'x420.dev':38","prices":[{"id":"d8bd0ca5-bbf4-46a3-b749-68585c3259ef","listingId":"5be758f1-2b6b-419e-b567-abefc5b04b8f","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://dev.x420.dev/api/puff-custom","description":"Buy custom USDC amount worth of DEV tokens 0x64a3fc16f47d5c39D526eF40adEcc8C050751b07","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":"2026-04-18T06:06:22.923Z"}],"sources":[{"listingId":"5be758f1-2b6b-419e-b567-abefc5b04b8f","source":"x402_bazaar","sourceId":"https://dev.x420.dev/api/puff-custom","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T06:06:22.923Z","lastSeenAt":"2026-04-23T05:00:32.029Z"}],"details":{"listingId":"5be758f1-2b6b-419e-b567-abefc5b04b8f","quickStartSnippet":"# No formal API docs available. The endpoint expects an x402 payment flow.\n# Based on the UI, you POST a USDC amount to purchase DEV tokens:\ncurl -X POST https://dev.x420.dev/api/puff-custom \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"amount\": \"1.00\"}'","exampleRequest":{"amount":"1.00"},"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":"DEV token contract is 0x64a3fc16f47d5c39D526eF40adEcc8C050751b07, created via Clanker, associated with 'adevcooks'","source_url":"https://dev.x420.dev"},{"claim":"The site exposes a 'Puff' action where users enter a USDC amount to purchase tokens","source_url":"https://dev.x420.dev"},{"claim":"Clanker rewards (WETH) claiming is referenced on the landing page","source_url":"https://dev.x420.dev"},{"claim":"/docs, /api, /pricing, /README all return placeholder 'doesn't exist' pages","source_url":"https://dev.x420.dev/docs"},{"claim":"Probe returned HTTP 405 instead of a 402 challenge","source_url":"https://dev.x420.dev/api/puff-custom"}],"useCases":["Programmatically purchasing DEV tokens with a specified USDC amount via an x402 payment flow","Integrating Clanker-launched token purchases into agent-driven DeFi workflows","Automating small token buys on Base using x402-compatible wallets"],"bestFor":["Agents or users wanting to buy DEV tokens with USDC in a single API call","x402-native payment flows on Base","Experimenting with Clanker token ecosystems"],"notFor":["Production trading requiring reliable uptime and documented APIs","Non-crypto or fiat-only payment workflows","Users needing detailed API documentation or SLAs"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:51.731Z"},"updatedAt":"2026-04-23T05:00:32.029Z"}}