{"id":"f926bd55-2f9c-4e26-b7f4-fd850c8207d3","shortId":"2Jffff","kind":"x402","title":"Transaction receipt endpoint on Base, paid per-call via x402 with USDC.","tagline":"Transaction receipt endpoint on Base, paid per-call via x402 with USDC.","description":"This endpoint at lowpaymentfee.com provides a transaction receipt for transaction ID 151, accessible via the x402 payment protocol. It is part of a broader platform that advertises multiple API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities — all priced at $0.02 per request and settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/transactions/151/receipt` returns a JSON response upon a POST request with a valid x402 payment header. The x402 challenge confirms the endpoint is live, accepting USDC (contract 0x8335…2913 on Base) with a maximum amount of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). The platform emphasizes simplicity: no API keys, no rate limits, no commitments — just pay-per-request via crypto.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI spec, no request/response schema beyond the x402 challenge's outputSchema stub, and no explanation of what a \"transaction receipt\" contains or what input parameters the POST body expects. The platform lists many other endpoints on its landing page, but this listing covers only the `/api/v1/transactions/151/receipt` resource.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","transaction-receipt","pay-per-request","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 payment endpoint","USDC micropayment API","Base network API","pay-per-call API","lowpaymentfee"],"warnings":["Documentation pages (/docs, /api, /pricing, /README) contain no substantive content — only 'Connect wallet' prompts.","No OpenAPI or schema available; request body format and response structure are unknown.","Endpoint is scoped to a single hardcoded transaction ID (151); unclear if other transaction IDs are available.","The platform lists many other endpoints on its landing page, but none were probed — their availability is unverified."],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/151/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/151/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and confirms pricing and payment details, but documentation is essentially nonexistent — every doc page returns only 'Connect wallet'. There is no OpenAPI spec, no request/response schema, and no explanation of what the endpoint actually returns. The endpoint path is hardcoded to a single transaction ID (151), which limits general 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'0.02':71,126 '000':121 '0x8335':111 '151':38 '20':120 '2913':112 '6':129 'Base network API' 'USDC micropayment API' 'accept':108 'access':39 'advertis':53 'ai':60 'amount':118 'analyt':59 'api':55,136,156 'base':5,18,80,114,122 'base-network' 'beyond':180 'bodi':202 'broader':50 'call':9,22 'categori':56 'challeng':102,183 'commit':142 'confirm':103 'connect':165 'contain':195 'content':171 'contract':110 'cover':217 'crypto':149 'data':58 'decim':130 'doc':155 'document':150 'emphas':133 'endpoint':3,16,28,84,105,209 'equal':125 'expect':203 'explan':189 'extrem':152 'financ':63 'header':99 'id':37 'includ':57 'infrastructur':66 'input':198 'json':88 'key':137 'land':212 'learn':62 'limit':140 'list':206,216 'live':107 'lowpaymentfee' 'lowpaymentfee.com':30 'machin':61 'mani':207 'maximum':117 'multipl':54 'network':81 'no-api-key' 'openapi':175 'outputschema':185 'page':160,213 'paid':6,19 'paramet':199 'part':47 'pay':145 'pay-per-call API' 'pay-per-request':144 'payment':43,98 'per':8,21,72,146 'per-cal':7,20 'platform':51,132,205 'post':92,201 'price':69,157 'prompt':167 'protocol':44 'provid':31 'rate':139 'readm':159 'receipt':2,15,34,194 'render':162 'request':73,93,147 'request/response':178 'resourc':221 'respons':89 'return':86 'schema':179 'settl':75 'simplic':134 'spars':153 'spec':176 'specif':83 'stub':186 'substant':170 'transact':1,14,33,36,193 'transaction receipt API' 'transaction-receipt' 'unit':123 'upon':90 'usdc':13,26,77,109,127 'usdc-settlement' 'use':128 'util':67 'valid':96 'via':10,23,40,148 'wallet':166 'web3':64 'x402':11,24,42,97,101,182 'x402 payment endpoint' 'x402-payment'","prices":[{"id":"0863bf36-1dcb-41be-97d2-4e31010d0263","listingId":"f926bd55-2f9c-4e26-b7f4-fd850c8207d3","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/151/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":"2026-04-18T18:58:37.583Z"}],"sources":[{"listingId":"f926bd55-2f9c-4e26-b7f4-fd850c8207d3","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/151/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:58:37.583Z","lastSeenAt":"2026-04-24T22:32:56.087Z"}],"details":{"listingId":"f926bd55-2f9c-4e26-b7f4-fd850c8207d3","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/151/receipt \\\n  -H \"X-PAYMENT: <x402_payment_header>\" \\\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 x402 challenge returns maxAmountRequired of 20000 base units in USDC on Base, equaling $0.02 per request.","source_url":"https://lowpaymentfee.com/api/v1/transactions/151/receipt"},{"claim":"The platform advertises $0.02/request pricing 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/151/receipt"},{"claim":"Documentation, API, pricing, and README pages render only a 'Connect wallet' prompt.","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving a receipt for a specific transaction (ID 151) via programmatic payment","Demonstrating x402 protocol integration for pay-per-request APIs","Agent-driven workflows that need verifiable transaction receipts"],"bestFor":["Developers experimenting with x402 payment protocol on Base","Agents that need to fetch transaction receipts without API key management","Low-cost per-call access to receipt data"],"notFor":["Bulk retrieval of many transaction receipts (only one transaction ID exposed)","Users who need detailed API documentation or OpenAPI specs before integrating","Non-crypto payment workflows — requires USDC on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:43.572Z"},"updatedAt":"2026-04-24T22:32:56.087Z"}}