{"id":"2027b863-edf7-476f-b04e-fdb6820b3150","shortId":"sw5gdN","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 path `/api/v1/transactions/376/receipt`) behind an x402 paywall. Payment is settled in USDC on the Base network at $0.02 per request (20,000 base units with 6 decimals). The endpoint accepts POST requests and returns JSON.\n\nThe broader lowpaymentfee.com platform advertises a suite of pay-per-call APIs spanning 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 priced at $0.02 per request with no API keys, no rate limits, and no commitments. However, this specific listing is for the transaction receipt endpoint only.\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 content. There is no OpenAPI schema, no request/response examples, and no detailed description of what the receipt payload contains or what input the POST body expects. The endpoint is confirmed live via a valid x402 402 challenge.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-call","transaction-receipt","json-response","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 micropayment","USDC payment API","Base network API","pay-per-request","lowpaymentfee","crypto receipt endpoint"],"warnings":["No OpenAPI or schema documentation available for this endpoint","All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no content","No request body schema or response schema documented — unclear what POST body is expected or what the receipt contains","This endpoint is for a single hardcoded transaction ID (376); unclear if it generalizes"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/376/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/376/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge with clear pricing, but there is no documentation, no OpenAPI schema, no request/response examples, and the docs pages are empty. The purpose of this specific receipt endpoint is unclear beyond its URL path. Effectively a stub 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'0.02':11,24,54,115 '000':58 '20':57 '402':198 '6':62 'Base network API' 'USDC payment API' 'accept':66 'access':32 'advertis':76 'ai/ml':88 'analysi':91 'analyt':87 'api':84,120,148 'base':8,21,51,59 'behind':40 'bodi':187 'broader':73 'call':83 'challeng':199 'classif':93 'commit':127 'confirm':192 'connect':157 'contain':181 'content':163 'convers':110 'crypto receipt endpoint' 'data':86,96 'decim':63 'descript':175 'detail':174 'doc':147 'document':139 'embed':94 'endpoint':28,65,137,190 'estim':104 'exampl':171 'exchang':99 'expect':188 'extrem':144 'feed':98 'finance/web3':95 'gas':103 'generat':111 'geocod':108 'howev':128 'infer':89 'infrastructur':106 'input':184 'json':71 'json-response' 'key':121 'limit':124 'list':131 'live':193 'lowpaymentfee' 'lowpaymentfee.com':30,74 'micropay':6,19 'network':9,22,52 'no-api-key' 'openapi':167 'page':152 'path':38 'pay':81 'pay-per-cal':80 'pay-per-call' 'pay-per-request' 'payload':180 'payment':44 'paywal':43 'per':12,25,55,82,116 'platform':75 'post':67,186 'price':97,113,149 'prompt':159 'provid':31 'quot':102 'rate':100,123 'readm':151 'receipt':2,15,36,136,179 'render':154 'request':13,26,56,68,117 'request/response':170 'resourc':37 'retriev':3,16 'return':70 'schema':168 'sentiment':90 'settl':46 'site':142 'span':85 'spars':145 'specif':130 'suit':78 'summar':92 'token':101 'transact':1,14,35,135 'transaction receipt API' 'transaction-receipt' 'unit':60 'usdc':48 'usdc-base' 'util':107 'valid':109,196 'via':4,17,194 'wallet':158 'x402':5,18,42,197 'x402 micropayment' 'x402-payment'","prices":[{"id":"81094aa0-799c-455f-870f-11d8281291eb","listingId":"2027b863-edf7-476f-b04e-fdb6820b3150","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/376/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":"2026-04-18T19:26:28.304Z"}],"sources":[{"listingId":"2027b863-edf7-476f-b04e-fdb6820b3150","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/376/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:26:28.304Z","lastSeenAt":"2026-04-24T06:32:42.916Z"}],"details":{"listingId":"2027b863-edf7-476f-b04e-fdb6820b3150","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/376/receipt \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns x402 402 challenge with maxAmountRequired 20000 in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/376/receipt"},{"claim":"Platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/376/receipt"}],"useCases":["Retrieving a receipt for a specific transaction via programmatic API call","Integrating pay-per-call receipt lookups into agent workflows without API key management","Demonstrating x402 protocol micropayment flows on Base network"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing keyless, pay-per-call access to transaction data","Projects requiring low-friction micropayment API integration on Base"],"notFor":["Bulk or high-volume receipt retrieval (no documented batch endpoint)","Users who need detailed API documentation or OpenAPI specs before integrating","Non-crypto workflows that cannot settle USDC on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:37.849Z"},"updatedAt":"2026-04-24T06:32:42.916Z"}}