{"id":"b3bf5ec3-1c00-485b-a9e5-4f128133b8c5","shortId":"3eyDbm","kind":"x402","title":"x402 payment endpoint: send $0.10 USDC on Base to a specified wallet and receive a transaction hash.","tagline":"x402 payment endpoint: send $0.10 USDC on Base to a specified wallet and receive a transaction hash.","description":"This endpoint is a straightforward x402-protocol payment resource hosted by Codenut AI. When called with a valid X-PAYMENT header containing a signed USDC payment of $0.10 on the Base network, it processes the payment to wallet address 0xfFDCD428845F2bFb2F07E6b4aF5A04F9a8e6D9A0 and returns a JSON object containing the resulting transaction hash.\n\nThe endpoint uses the x402 \"exact\" payment scheme on Base mainnet with USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, 6 decimals). The maxAmountRequired is 100000 (i.e., $0.10 in USDC's 6-decimal representation). Payment verification and settlement are handled through Codenut's facilitator service at https://facilitator.codenut.ai/. The x402 challenge is live and returns a well-formed 402 response with version 1 of the protocol.\n\nNote that this endpoint appears to be a simple payment/transfer primitive rather than a service that returns computed data. The only documented output is a transaction hash confirming the payment was settled. There is no additional API documentation, OpenAPI spec, or detailed description of use cases beyond the payment itself. It may serve as a building block for agent-to-agent payments, tipping, or pay-per-call gating on other Codenut services.","tags":[],"capabilities":["x402-payment","usdc-transfer","base-network","transaction-hash-response","exact-scheme","agent-payment"],"categories":["payments","crypto"],"synonyms":["x402 payment","USDC payment endpoint","Base network payment","crypto micropayment","agent payment","pay-per-call","402 payment required","Codenut payment"],"warnings":["No OpenAPI or detailed API documentation available for this endpoint","The endpoint appears to be a simple payment primitive — the only output is a transaction hash","No /docs, /api, or /pricing pages found (all return 404)","Purpose and broader utility beyond payment transfer are not documented"],"endpointUrl":"https://pay.codenut.ai/x402/0xfFDCD428845F2bFb2F07E6b4aF5A04F9a8e6D9A0/0.1","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0xfFDCD428845F2bFb2F07E6b4aF5A04F9a8e6D9A0","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://pay.codenut.ai/x402/0xfFDCD428845F2bFb2F07E6b4aF5A04F9a8e6D9A0/0.1","description":"x402 Payment of $0.1 to 0xfFDCD428845F2bFb2F07E6b4aF5A04F9a8e6D9A0","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true},"output":{"type":"json","schema":{"type":"object","required":["txHash"],"properties":{"txHash":{"type":"string"}}}}},"maxAmountRequired":"100000","maxTimeoutSeconds":60}]},"qualityScore":"0.400","qualityRationale":"The x402 challenge is live and well-formed, confirming the endpoint works. However, there is no OpenAPI spec, no detailed documentation for this specific endpoint, and the service appears to be a bare payment primitive with minimal output (just a txHash). The purpose beyond simple payment transfer is 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'0.10':5,22,64,109 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':101 '0xffdcd428845f2bfb2f07e6b4af5a04f9a8e6d9a0':76 '1':146 '100000':107 '402':142 '402 payment required' '6':102,113 'Base network payment' 'Codenut payment' 'USDC payment endpoint' 'addit':185 'address':75 'agent':209,211 'agent payment' 'agent-payment' 'agent-to-ag':208 'ai':48 'api':186 'appear':154 'base':8,25,67,96 'base-network' 'beyond':196 'block':206 'build':205 'call':50,218 'case':195 'challeng':133 'codenut':47,123,222 'comput':167 'confirm':177 'contain':58,82 'contract':100 'crypto micropayment' 'data':168 'decim':103,114 'descript':192 'detail':191 'document':171,187 'endpoint':3,20,36,88,153 'exact':92 'exact-scheme' 'facilit':125 'facilitator.codenut.ai':129 'facilitator.codenut.ai/.':128 'form':141 'gate':219 'handl':121 'hash':17,34,86,176 'header':57 'host':45 'i.e':108 'json':80 'live':135 'mainnet':97 'maxamountrequir':105 'may':201 'network':68 'note':150 'object':81 'openapi':188 'output':172 'pay':216 'pay-per-cal':215 'pay-per-call' 'payment':2,19,43,56,62,72,93,116,179,198,212 'payment/transfer':159 'per':217 'primit':160 'process':70 'protocol':42,149 'rather':161 'receiv':14,31 'represent':115 'resourc':44 'respons':143 'result':84 'return':78,137,166 'scheme':94 'send':4,21 'serv':202 'servic':126,164,223 'settl':181 'settlement':119 'sign':60 'simpl':158 'spec':189 'specifi':11,28 'straightforward':39 'tip':213 'transact':16,33,85,175 'transaction-hash-response' 'usdc':6,23,61,99,111 'usdc-transfer' 'use':89,194 'valid':53 'verif':117 'version':145 'wallet':12,29,74 'well':140 'well-form':139 'x':55 'x-payment':54 'x402':1,18,41,91,132 'x402 payment' 'x402-payment' 'x402-protocol':40","prices":[{"id":"fcf0317a-afef-425d-a316-df4b5af19b85","listingId":"b3bf5ec3-1c00-485b-a9e5-4f128133b8c5","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":"100000","chain":"base","payTo":"0xfFDCD428845F2bFb2F07E6b4aF5A04F9a8e6D9A0","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0xfFDCD428845F2bFb2F07E6b4aF5A04F9a8e6D9A0","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://pay.codenut.ai/x402/0xfFDCD428845F2bFb2F07E6b4aF5A04F9a8e6D9A0/0.1","description":"x402 Payment of $0.1 to 0xfFDCD428845F2bFb2F07E6b4aF5A04F9a8e6D9A0","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true},"output":{"type":"json","schema":{"type":"object","required":["txHash"],"properties":{"txHash":{"type":"string"}}}}},"maxAmountRequired":"100000","maxTimeoutSeconds":60}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":60},"createdAt":"2026-04-18T18:30:53.245Z"}],"sources":[{"listingId":"b3bf5ec3-1c00-485b-a9e5-4f128133b8c5","source":"x402_bazaar","sourceId":"https://pay.codenut.ai/x402/0xfFDCD428845F2bFb2F07E6b4aF5A04F9a8e6D9A0/0.1","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:30:53.245Z","lastSeenAt":"2026-04-25T01:30:48.698Z"}],"details":{"listingId":"b3bf5ec3-1c00-485b-a9e5-4f128133b8c5","quickStartSnippet":"# 1. GET the endpoint without payment to receive the 402 challenge:\ncurl -i https://pay.codenut.ai/x402/0xfFDCD428845F2bFb2F07E6b4aF5A04F9a8e6D9A0/0.1\n\n# 2. With x402 client (JS):\nimport { createPaymentHeader } from 'x402/client';\nconst header = await createPaymentHeader(walletClient, 1, requirements);\nconst res = await fetch(\n  'https://pay.codenut.ai/x402/0xfFDCD428845F2bFb2F07E6b4aF5A04F9a8e6D9A0/0.1',\n  { headers: { 'X-PAYMENT': header } }\n);\nconst { txHash } = await res.json();","exampleRequest":null,"exampleResponse":{"txHash":"0xabc123def456789..."},"schema":{"input":{"type":"http","method":"GET","discoverable":true},"output":{"type":"json","schema":{"type":"object","required":["txHash"],"properties":{"txHash":{"type":"string"}}}}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with x402Version 1, exact scheme, on Base network with USDC","source_url":"https://pay.codenut.ai/x402/0xfFDCD428845F2bFb2F07E6b4aF5A04F9a8e6D9A0/0.1"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 with 6 decimals on Base","source_url":"https://pay.codenut.ai"},{"claim":"Facilitator URL is https://facilitator.codenut.ai/ for Base network","source_url":"https://pay.codenut.ai"},{"claim":"Output schema specifies a JSON object with a required txHash string field","source_url":"https://pay.codenut.ai/x402/0xfFDCD428845F2bFb2F07E6b4aF5A04F9a8e6D9A0/0.1"}],"useCases":["Agent-to-wallet USDC transfers on Base for $0.10","Programmatic tipping or donation to a specific wallet","Testing x402 payment flows against a live endpoint","Pay-per-call gating where the payment itself is the service"],"bestFor":["Developers testing x402 client integrations","AI agents that need to make small USDC payments on Base","Prototyping x402 payment flows with a live endpoint"],"notFor":["Retrieving data or computed results beyond a transaction hash","Payments on networks other than Base (e.g., Ethereum mainnet, Solana)","Large-value transfers (fixed at $0.10)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:20.159Z"},"updatedAt":"2026-04-25T01:30:48.698Z"}}