{"id":"21949c1b-32ce-4053-b0eb-d3c0a6652623","shortId":"4UVPcR","kind":"x402","title":"Transaction receipt retrieval via x402 micropayment on Base network for $0.02 per request.","tagline":"Transaction receipt retrieval via x402 micropayment on Base network for $0.02 per request.","description":"This endpoint at lowpaymentfee.com provides access to a transaction receipt (resource ID 361) behind an x402 paywall. The site operates a broad suite of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request and settled in USDC on the Base network. No API keys, rate limits, or subscriptions are required; callers simply attach an x402 payment header to each request.\n\nThe specific endpoint `/api/v1/transactions/361/receipt` is labeled \"Premium API Access\" and accepts POST requests. It returns application/json content. The x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using the \"exact\" scheme with a 300-second timeout.\n\nDocumentation on the site is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The endpoint is live (returns a proper 402 challenge), but the actual data returned after payment is unknown from the available material.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","transaction-receipt","json-response","no-api-key","no-rate-limit"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 micropayment API","USDC pay-per-call","Base network API","lowpaymentfee","crypto payment API","402 payment required"],"warnings":["No API documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet' with no content","No OpenAPI or schema definition found for request or response payloads","The actual data returned by this endpoint after payment is completely undocumented","This is a single resource-specific endpoint (/transactions/361/receipt); it is unclear whether other transaction IDs are accessible or what 'Premium API Access' specifically provides"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/361/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/361/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The purpose of the specific receipt endpoint is unclear beyond its generic label. Effectively a stub 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'/api/v1/transactions/361/receipt':102 '/docs':164 '/pricing':166 '/readme':168 '0.02':11,24,69,135 '000':124 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':146 '0x8335':129 '20':123 '2913':130 '300':153 '361':39 '402':203 '402 payment required' '6':139 'Base network API' 'USDC pay-per-call' 'accept':109 'access':32,107 'actual':207 'address':145 'advertis':119 'ai/ml':59 'analyt':58 'api':55,81,106 'application/json':114 'attach':91 'avail':195,216 'base':8,21,78,125,132 'behind':40 'broad':48 'call':54 'caller':89 'challeng':118,204 'connect':174 'content':115 'crypto payment API' 'data':57,62,208 'decim':140 'detail':181 'document':156,190 'endpoint':28,101,197 'equal':134 'exact':149 'exampl':193 'extrem':161 'finance/web3':61 'given':136 'header':95 'id':38 'infer':60 'infrastructur':64 'json-response' 'key':82 'label':104 'limit':84 'live':199 'lowpaymentfee' 'lowpaymentfee.com':30 'materi':217 'maxamountrequir':121 'micropay':6,19 'network':9,22,79 'no-api-key' 'no-rate-limit' 'openapi':185 'oper':46 'page':169 'pay':52 'pay-per-cal':51 'pay-per-request' 'payload':194 'payment':94,141,211 'paywal':43 'per':12,25,53,70 'post':110 'premium':105 'price':67 'prompt':176 'proper':202 'provid':31 'rate':83 'receipt':2,15,36 'render':171 'request':13,26,71,98,111 'request/response':188 'requir':88 'resourc':37 'retriev':3,16 'return':113,200,209 'schema':189 'scheme':150 'second':154 'sent':143 'settl':73 'simpli':90 'site':45,159 'span':56 'spars':162 'spec':186 'specif':100 'subscript':86 'suit':49 'technic':180 'timeout':155 'transact':1,14,35 'transaction receipt API' 'transaction-receipt' 'unit':126 'unknown':213 'usdc':75,128,137 'usdc-base' 'use':147 'util':65 'via':4,17 'wallet':175 'x402':5,18,42,93,117 'x402 micropayment API' 'x402-payment'","prices":[{"id":"639a80de-4374-4a63-95c4-70ceb05490c5","listingId":"21949c1b-32ce-4053-b0eb-d3c0a6652623","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/361/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":"2026-04-18T19:26:15.601Z"}],"sources":[{"listingId":"21949c1b-32ce-4053-b0eb-d3c0a6652623","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/361/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:26:15.601Z","lastSeenAt":"2026-04-24T07:32:36.519Z"}],"details":{"listingId":"21949c1b-32ce-4053-b0eb-d3c0a6652623","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/361/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":"The site advertises all APIs at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge specifies maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/361/receipt"},{"claim":"The endpoint accepts POST requests and returns application/json","source_url":"https://lowpaymentfee.com/api/v1/transactions/361/receipt"}],"useCases":["Retrieving transaction receipt data for a specific transaction via micropayment","Programmatic access to receipt information without API key management","Agent-driven workflows that need on-demand paid data retrieval"],"bestFor":["Developers wanting zero-signup, pay-per-call API access","AI agents that can settle x402 payments in USDC on Base","Use cases requiring no rate limits or subscription commitments"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","Bulk retrieval of many different transaction receipts (only resource 361 is exposed at this endpoint)","Non-crypto payment workflows — requires USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:38.446Z"},"updatedAt":"2026-04-24T07:32:36.519Z"}}