{"id":"5f557d9d-0214-4c47-bba0-77f126afc792","shortId":"QTM2XY","kind":"x402","title":"Buy a custom USDC amount of MUNCH tokens via x402 payment protocol","tagline":"Buy a custom USDC amount of MUNCH tokens via x402 payment protocol","description":"This x402-enabled endpoint at munch.x420.dev allows callers to purchase MUNCH tokens (contract 0x70B1dC3d736F164befCb23388608DD822b253B07) by spending a custom amount of USDC. MUNCH is a token created via Clanker on Base, and the endpoint is part of the x420.dev platform which hosts x402-compatible token purchase actions.\n\nBased on the landing page stats, the endpoint has processed 36 total transactions from 14 unique users with an average latency of 2.68 seconds, an 86% success rate, and a trust score of 80%. The UI labels the action as \"Puff\" and accepts an amount in USDC as input. No formal API documentation, OpenAPI schema, or pricing details are available — the /docs, /api, /pricing, and /README paths all return placeholder pages. The probe also did not receive a standard 402 challenge from the endpoint (returned 405 instead), which may indicate the endpoint requires a specific HTTP method or additional headers.\n\nGiven the lack of documentation and schema, integrating this endpoint requires experimentation or reverse-engineering the request format. The token can be verified on Clanker and activity can be tracked on x402scan.","tags":[],"capabilities":["token-purchase","usdc-payment","x402-protocol","base-chain","custom-amount"],"categories":["crypto","defi"],"synonyms":["MUNCH token","puff","buy MUNCH","USDC swap","x420","clanker token","x402 token purchase","munch puff"],"warnings":["Endpoint returned 405 instead of expected 402 challenge — may require specific HTTP method or headers","No API documentation exists; /docs, /api, /pricing, /README all return 'doesn't exist' pages","Request and response schemas are entirely inferred and unverified","86% success rate and 80% trust score suggest some reliability concerns","Only 36 total transactions from 14 users — very low usage"],"endpointUrl":"https://munch.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://munch.x420.dev/api/puff-custom","description":"Buy custom USDC amount worth of MUNCH tokens 0x70B1dC3d736F164befCb23388608DD822b253B07","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":"0.200","qualityRationale":"No API documentation, no OpenAPI schema, no x402 challenge returned from the probe (405 instead of 402), and all doc/api/pricing paths are placeholder pages. The request format and response structure are entirely inferred from the UI. This is effectively a stub 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'/docs':134 '/pricing':136 '/readme':138 '0x70b1dc3d736f164befcb23388608dd822b253b07':39 '14':87 '2.68':95 '36':83 '402':152 '405':158 '80':106 '86':98 'MUNCH token' 'USDC swap' 'accept':115 'action':72,111 'activ':200 'addit':171 'allow':32 'also':146 'amount':5,17,44,117 'api':124 'avail':132 'averag':92 'base':55,73 'base-chain' 'buy':1,13 'buy MUNCH' 'caller':33 'challeng':153 'clanker':53,198 'clanker token' 'compat':69 'contract':38 'creat':51 'custom':3,15,43 'custom-amount' 'detail':130 'document':125,177 'enabl':28 'endpoint':29,58,80,156,164,182 'engin':188 'experiment':184 'formal':123 'format':191 'given':173 'header':172 'host':66 'http':168 'indic':162 'input':121 'instead':159 'integr':180 'label':109 'lack':175 'land':76 'latenc':93 'may':161 'method':169 'munch':7,19,36,47 'munch puff' 'munch.x420.dev':31 'openapi':126 'page':77,143 'part':60 'path':139 'payment':11,23 'placehold':142 'platform':64 'price':129 'probe':145 'process':82 'protocol':12,24 'puff':113 'purchas':35,71 'rate':100 'receiv':149 'request':190 'requir':165,183 'return':141,157 'revers':187 'reverse-engin':186 'schema':127,179 'score':104 'second':96 'specif':167 'spend':41 'standard':151 'stat':78 'success':99 'token':8,20,37,50,70,193 'token-purchase' 'total':84 'track':203 'transact':85 'trust':103 'ui':108 'uniqu':88 'usdc':4,16,46,119 'usdc-payment' 'user':89 'verifi':196 'via':9,21,52 'x402':10,22,27,68 'x402 token purchase' 'x402-compatible':67 'x402-enabled':26 'x402-protocol' 'x402scan':205 'x420' 'x420.dev':63","prices":[{"id":"d31c4c1a-6e1b-4f0f-9422-6d49de226057","listingId":"5f557d9d-0214-4c47-bba0-77f126afc792","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://munch.x420.dev/api/puff-custom","description":"Buy custom USDC amount worth of MUNCH tokens 0x70B1dC3d736F164befCb23388608DD822b253B07","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":"2026-04-18T06:06:23.576Z"}],"sources":[{"listingId":"5f557d9d-0214-4c47-bba0-77f126afc792","source":"x402_bazaar","sourceId":"https://munch.x420.dev/api/puff-custom","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T06:06:23.576Z","lastSeenAt":"2026-04-23T05:00:32.162Z"}],"details":{"listingId":"5f557d9d-0214-4c47-bba0-77f126afc792","quickStartSnippet":"# No formal schema available. Based on the UI, the endpoint likely accepts a POST with a USDC amount.\ncurl -X POST https://munch.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":"MUNCH token contract is 0x70B1dC3d736F164befCb23388608DD822b253B07, created via Clanker","source_url":"https://munch.x420.dev"},{"claim":"36 total transactions, 14 unique users, 2.68s avg latency, 86% success rate, 80% trust score","source_url":"https://munch.x420.dev"},{"claim":"Endpoint probe returned 405 instead of 402 challenge","source_url":"https://munch.x420.dev/api/puff-custom"},{"claim":"Token activity viewable on x402scan","source_url":"https://www.x402scan.com/recipient/0x93109d14f6665a9c9675290d3cd5a6c07bbafdbd/resources"}],"useCases":["Programmatically purchasing MUNCH tokens with USDC via an AI agent","Automating token buys through x402 payment flows","Integrating meme-token purchases into agent workflows"],"bestFor":["AI agents that need to buy tokens via x402 protocol","Developers experimenting with x402-based DeFi actions","Automated trading bots targeting Clanker-launched tokens"],"notFor":["Users needing well-documented, production-grade swap APIs","High-frequency trading requiring sub-second latency","Purchasing tokens other than MUNCH"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:50.957Z"},"updatedAt":"2026-04-23T05:00:32.162Z"}}