{"id":"b730c9de-0b2b-45d0-9308-b00a41131cbb","shortId":"A9L3jy","kind":"x402","title":"Pay-per-call transaction receipt endpoint on Base via x402, settling in USDC at $0.02/request.","tagline":"Pay-per-call transaction receipt endpoint on Base via x402, settling in USDC at $0.02/request.","description":"This endpoint at lowpaymentfee.com provides a transaction receipt via a POST request, gated by the x402 payment protocol. It settles on the Base network using USDC (contract 0x8335…2913) with a maximum cost of $0.02 per call (20,000 base units at 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe specific endpoint `/api/v1/transactions/17/receipt` appears to be one resource in a broader platform that offers data & analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance & Web3 data (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints on the platform are listed at $0.02 per request with the same x402 payment model on Base.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no detailed description of what the transaction receipt endpoint actually returns. The endpoint is confirmed live (returns a proper 402 challenge), but the lack of documentation makes it difficult to know the exact request format or response payload without experimentation.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","transaction-receipt","pay-per-call","no-api-key","no-rate-limit"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 payment endpoint","USDC micropayment API","Base network API","pay-per-request API","lowpaymentfee"],"warnings":["Documentation pages (docs, API, pricing, README) all render only 'Connect wallet' with no usable content","No OpenAPI or schema available — request format and response structure are unknown","The endpoint path references a specific transaction ID (17); it is unclear whether this is parameterized or fixed","The platform lists many other endpoints but none have documented schemas or examples"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/17/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/17/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live with a valid 402 challenge, but documentation is essentially nonexistent — docs/pricing/API/README pages all show only 'Connect wallet'. No OpenAPI schema, no request/response examples, and the specific purpose of 'transaction 17 receipt' is unclear. The listing is effectively a 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'/request':17,34 '0.02':16,33,69,151 '000':73 '0x8335':62 '20':72 '2913':63 '402':212 '6':77 'Base network API' 'USDC micropayment API' 'actual':202 'ai/ml':118 'analysi':121 'analyt':117 'api':80,168 'appear':105 'attach':89 'base':9,26,57,74,161 'base-network' 'broader':112 'call':4,21,71 'caller':87 'challeng':213 'classif':123 'confirm':207 'connect':177 'content':183 'contract':61 'convers':141 'cost':67 'data':116,127 'decim':78 'descript':195 'detail':194 'difficult':221 'doc':167 'document':162,218 'embed':124 'endpoint':7,24,36,103,144,201,205 'estim':135 'exact':225 'exampl':191 'exchang':130 'experiment':232 'extrem':164 'feed':129 'financ':125 'format':227 'gas':134 'gate':47 'generat':142 'geocod':139 'header':94 'infer':119 'infrastructur':137 'key':81 'know':223 'lack':216 'limit':84 'list':149 'live':208 'lowpaymentfee' 'lowpaymentfee.com':38 'make':219 'maximum':66 'model':159 'network':58 'no-api-key' 'no-rate-limit' 'offer':115 'one':108 'openapi':187 'page':172 'pay':2,19 'pay-per-cal':1,18 'pay-per-call' 'pay-per-request API' 'payload':230 'payment':51,93,99,158 'per':3,20,70,152 'platform':113,147 'post':45 'price':128,169 'prompt':179 'proof':100 'proper':211 'protocol':52 'provid':39 'quot':133 'rate':83,131 'readm':171 'receipt':6,23,42,200 'render':174 'request':46,153,226 'request/response':190 'requir':86 'resourc':109 'respons':229 'return':203,209 'schema':188 'sentiment':120 'settl':12,29,54 'simpli':88 'spars':165 'specif':102 'summar':122 'token':132 'transact':5,22,41,199 'transaction receipt API' 'transaction-receipt' 'unit':75 'usdc':14,31,60 'usdc-settlement' 'use':59 'util':138 'valid':97,140 'via':10,27,43 'wallet':178 'web3':126 'without':231 'x':92 'x-payment':91 'x402':11,28,50,98,157 'x402 payment endpoint' 'x402-payment'","prices":[{"id":"de807364-7167-4b0e-907c-7658abe4f929","listingId":"b730c9de-0b2b-45d0-9308-b00a41131cbb","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/17/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":"2026-04-18T18:58:48.547Z"}],"sources":[{"listingId":"b730c9de-0b2b-45d0-9308-b00a41131cbb","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/17/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:58:48.547Z","lastSeenAt":"2026-04-24T21:32:28.647Z"}],"details":{"listingId":"b730c9de-0b2b-45d0-9308-b00a41131cbb","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/17/receipt\n# Returns 402 with x402 challenge. Attach a valid X-PAYMENT header\n# with USDC payment proof on Base to receive the receipt.","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns HTTP 402 with x402 v1 challenge, accepting USDC on Base with maxAmountRequired of 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/transactions/17/receipt"},{"claim":"Platform lists all endpoints at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/17/receipt"}],"useCases":["Retrieving a transaction receipt for transaction ID 17 via a single paid API call","Programmatic access to transaction data without managing API keys or subscriptions","Agent-driven workflows that need on-demand transaction receipts settled in USDC on Base"],"bestFor":["Developers wanting zero-setup, pay-per-call access to transaction receipts","AI agents that can settle x402 payments autonomously on Base","Users who prefer crypto micropayments over traditional API billing"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integrating","Bulk retrieval of many transaction receipts (no batch endpoint documented)","Users who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:43.041Z"},"updatedAt":"2026-04-24T21:32:28.647Z"}}