{"id":"5e16f91a-0eed-42bc-993e-3547d5f757dc","shortId":"jDNhKg","kind":"x402","title":"Pay-per-call transaction receipt endpoint on Base via x402, $0.02 per request in USDC.","tagline":"Pay-per-call transaction receipt endpoint on Base via x402, $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides a \"Premium API Access\" receipt resource for transaction ID 70. It is part of a broader platform offering pay-per-request APIs across data/analytics, AI/ML, finance/Web3, and infrastructure categories—all priced at $0.02 per call with no API keys, no rate limits, and no commitments.\n\nThe specific endpoint `/api/v1/transactions/70/receipt` accepts POST requests and is gated by the x402 protocol on the Base network. Payment is settled in USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with a maximum amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). The response MIME type is application/json. The payment timeout is 300 seconds.\n\nDocumentation on the site is extremely sparse—most pages beyond the landing page only show a \"Connect wallet\" prompt. There is no OpenAPI spec, no detailed schema for request/response bodies, and no usage examples. The endpoint is confirmed live (returns a proper 402 x402 challenge), but the actual functionality behind the receipt resource is not documented.","tags":[],"capabilities":["x402-payment-gated","usdc-settlement","base-network","per-request-pricing","transaction-receipt","json-response"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 paid endpoint","USDC micropayment API","Base network API","pay-per-call API","lowpaymentfee"],"warnings":["No OpenAPI or schema documentation available","All doc/pricing/API pages only render 'Connect wallet' with no useful content","The specific resource path (/transactions/70/receipt) suggests a fixed transaction ID—unclear if this is a demo or production endpoint","No response body schema or example available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/70/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/70/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 x402 challenge, but there is no OpenAPI spec, no request/response schema, no documentation beyond a landing page listing, and the specific purpose of 'transactions/70/receipt' is unclear. Effectively a stub 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'0.02':12,28,71,119 '000':115 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':108 '20':114 '300':135 '402':179 '6':123 '70':47 'Base network API' 'USDC micropayment API' 'accept':88 'access':41 'across':61 'actual':184 'ai/ml':63 'amount':112 'api':40,60,76 'application/json':130 'base':9,25,100,116 'base-network' 'behind':186 'beyond':146 'bodi':166 'broader':53 'call':4,20,73 'categori':67 'challeng':181 'commit':83 'confirm':174 'connect':153 'contract':107 'data/analytics':62 'decim':124 'detail':162 'document':137,192 'endpoint':7,23,34,86,172 'exampl':170 'extrem':142 'finance/web3':64 'function':185 'gate':93 'given':120 'i.e':118 'id':46 'infrastructur':66 'json-response' 'key':77 'land':148 'limit':80 'live':175 'lowpaymentfee' 'lowpaymentfee.com':36 'maximum':111 'mime':127 'network':101 'offer':55 'openapi':159 'page':145,149 'part':50 'pay':2,18,57 'pay-per-cal':1,17 'pay-per-call API' 'pay-per-request':56 'payment':102,132 'per':3,13,19,29,58,72 'per-request-pricing' 'platform':54 'post':89 'premium':39 'price':69 'prompt':155 'proper':178 'protocol':97 'provid':37 'rate':79 'receipt':6,22,42,188 'request':14,30,59,90 'request/response':165 'resourc':43,189 'respons':126 'return':176 'schema':163 'second':136 'settl':104 'show':151 'site':140 'spars':143 'spec':160 'specif':85 'timeout':133 'transact':5,21,45 'transaction receipt API' 'transaction-receipt' 'type':128 'unit':117 'usag':169 'usdc':16,32,106,121 'usdc-settlement' 'via':10,26 'wallet':154 'x402':11,27,96,180 'x402 paid endpoint' 'x402-payment-gated'","prices":[{"id":"d9bc79cb-fa9e-4331-b12d-1b6d5673ad11","listingId":"5e16f91a-0eed-42bc-993e-3547d5f757dc","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/70/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":"2026-04-18T19:26:56.838Z"}],"sources":[{"listingId":"5e16f91a-0eed-42bc-993e-3547d5f757dc","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/70/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:26:56.838Z","lastSeenAt":"2026-04-24T02:02:57.809Z"}],"details":{"listingId":"5e16f91a-0eed-42bc-993e-3547d5f757dc","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/70/receipt\n# Returns 402 with x402 challenge; include X-PAYMENT header with valid payment proof to access the resource.","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge on POST, confirming it is live","source_url":"https://lowpaymentfee.com/api/v1/transactions/70/receipt"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/70/receipt"}],"useCases":["Retrieving a transaction receipt after completing a payment flow","Programmatic verification of transaction completion","Agent-driven purchase of premium data behind a paywall"],"bestFor":["Developers building on Base who want frictionless pay-per-call APIs","AI agents that can settle x402 payments autonomously","Use cases requiring no API key signup or rate-limit management"],"notFor":["Users needing detailed API documentation or SDKs before integrating","High-volume batch processing where per-call pricing is inefficient","Non-crypto users without a Base-compatible wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:36.473Z"},"updatedAt":"2026-04-24T02:02:57.809Z"}}