{"id":"653d7b13-6288-4baa-89b0-db13167eb97b","shortId":"6Lg7mX","kind":"x402","title":"Pay-per-call transaction receipt endpoint on Base via x402, settled in USDC at $0.02/request.","tagline":"Pay-per-call transaction receipt endpoint on Base via x402, settled in USDC at $0.02/request.","description":"This endpoint at lowpaymentfee.com provides a transaction receipt retrieval service accessible via the x402 payment protocol. It is part of a broader platform offering multiple API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities—all priced at $0.02 per request with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint `/api/v1/transactions/222/receipt` accepts POST requests and returns a JSON response upon successful payment. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with a maximum amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). The x402 challenge confirms the endpoint is live and discoverable.\n\nDocumentation on the site is extremely sparse—most pages beyond the landing page only show a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no examples of what the receipt payload actually contains. The endpoint path suggests it retrieves a receipt for a specific transaction (ID 222), but it is unclear whether this is a demo/fixed resource or parameterized.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","transaction-receipt","pay-per-call","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt","payment receipt API","x402 endpoint","USDC micropayment","Base network API","pay-per-request","lowpaymentfee"],"warnings":["No OpenAPI or schema documentation available","All documentation pages beyond the landing page return only 'Connect wallet' with no content","Unclear whether /transactions/222/receipt is a fixed demo resource or parameterized","No example responses or error handling documentation"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/222/receipt","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/transactions/222/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge with clear pricing and network details, but there is no OpenAPI spec, no request/response schema, no documentation beyond a landing page, and the actual functionality of the receipt endpoint is 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'/request':17,34 '0.02':16,33,76,126 '000':122 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':115 '20':121 '222':198 '6':130 'Base network API' 'USDC micropayment' 'accept':94 'access':45 'actual':183 'ai':65 'amount':119 'analyt':64 'api':60,81 'base':9,26,110,123 'base-network' 'beyond':151 'broader':56 'call':4,21 'categori':61 'challeng':134 'commit':88 'confirm':135 'connect':158 'contain':184 'contract':114 'data':63 'decim':131 'demo/fixed':207 'detail':165 'discover':141 'document':142,174 'endpoint':7,24,36,92,137,186 'exampl':177 'extrem':147 'financ':68 'given':127 'i.e':125 'id':197 'includ':62 'infrastructur':71 'json':100 'key':82 'land':153 'learn':67 'limit':85 'live':139 'lowpaymentfee' 'lowpaymentfee.com':38 'machin':66 'maximum':118 'multipl':59 'network':111 'no-api-key' 'offer':58 'openapi':169 'page':150,154 'parameter':210 'part':53 'path':187 'pay':2,19 'pay-per-cal':1,18 'pay-per-call' 'pay-per-request' 'payload':182 'payment':49,104,105 'payment receipt API' 'per':3,20,77 'platform':57 'post':95 'price':74 'prompt':160 'protocol':50 'provid':39 'rate':84 'receipt':6,23,42,181,192 'request':78,96 'request/response':172 'requir':89 'resourc':208 'respons':101 'retriev':43,190 'return':98 'schema':173 'servic':44 'settl':12,29,107 'show':156 'site':145 'spars':148 'spec':170 'specif':91,195 'success':103 'suggest':188 'technic':164 'transact':5,22,41,196 'transaction receipt' 'transaction-receipt' 'unclear':202 'unit':124 'upon':102 'usdc':14,31,113,128 'usdc-settlement' 'use':112 'util':72 'via':10,27,46 'wallet':159 'web3':69 'whether':203 'x402':11,28,48,133 'x402 endpoint' 'x402-payment'","prices":[{"id":"1548567f-e4fd-4d82-9174-a7e78f00c255","listingId":"653d7b13-6288-4baa-89b0-db13167eb97b","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":"20000","chain":"base","payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/transactions/222/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:59:15.651Z"}],"sources":[{"listingId":"653d7b13-6288-4baa-89b0-db13167eb97b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/222/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:59:15.651Z","lastSeenAt":"2026-04-24T18:33:04.828Z"}],"details":{"listingId":"653d7b13-6288-4baa-89b0-db13167eb97b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/222/receipt \\\n  -H \"X-PAYMENT: <x402_payment_token>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/222/receipt"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/222/receipt"}],"useCases":["Retrieving transaction receipts programmatically after on-chain or off-chain payments","Integrating pay-per-call receipt generation into automated billing workflows","Demonstrating x402 protocol payment flows for agent-to-agent commerce"],"bestFor":["Developers experimenting with x402 payment protocol integrations","Agents needing low-cost, keyless API access on Base network","Prototyping micropayment-gated API services"],"notFor":["Production systems requiring detailed API documentation and SLAs","Use cases needing bulk/batch transaction receipt retrieval at scale","Users without USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:41.732Z"},"updatedAt":"2026-04-24T18:33:04.828Z"}}