{"id":"f104ab2a-2823-4c1c-bd3b-ada843e75076","shortId":"3uYbhR","kind":"x402","title":"Pay-per-call transaction receipt endpoint on Base via x402, settled in USDC at $0.02/request.","tagline":"Pay-per-call transaction receipt endpoint on Base via x402, settled in USDC at $0.02/request.","description":"This x402-enabled endpoint at lowpaymentfee.com provides a transaction receipt for transaction ID 139 via a POST request. It is part of a broader platform that offers a variety of pay-per-call APIs spanning 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/139/receipt` returns a JSON response (MIME type `application/json`) and requires an x402 payment header. The x402 challenge confirms the endpoint is live, advertising a max amount of 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals), which equals $0.02. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a timeout of 300 seconds.\n\nThe platform advertises no API keys, no rate limits, and instant access. However, documentation pages (`/docs`, `/pricing`, `/api`, `/README`) all returned only a \"Connect wallet\" prompt with no substantive content, so the actual behavior, request parameters, and response schema for this endpoint are unknown. The endpoint appears to be one of many on the platform, but the specific purpose of a \"transaction receipt\" for a hardcoded transaction ID 139 is unclear — it may be a demo or placeholder endpoint.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","transaction-receipt","pay-per-call","json-response"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 payment endpoint","USDC micropayment API","Base network API","pay-per-request API","lowpaymentfee"],"warnings":["All documentation pages (/docs, /pricing, /api, /README) returned no content beyond 'Connect wallet'","No request body schema or response schema documented anywhere","Endpoint references a specific transaction ID (139) — unclear if this is parameterizable or a fixed demo","No OpenAPI spec, no AI plugin manifest, no robots.txt, no agents.txt found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/139/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/139/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 network details, but all documentation pages are empty (showing only 'Connect wallet'). No request parameters, response schema, or meaningful docs are available. The endpoint path references a hardcoded transaction ID, making its general utility 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'/api/v1/transactions/139/receipt':99 '/docs':168 '/pricing':169 '/readme':171 '/request':17,34 '0.02':16,33,85,140 '000':127 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':146 '0x8335':132 '139':49,221 '20':126 '2913':133 '300':151 '6':136 'Base network API' 'USDC micropayment API' 'access':164 'actual':185 'address':145 'advertis':121,155 'ai':74 'amount':124 'analyt':73 'api':70,157 'appear':199 'application/json':106 'base':9,26,94,128,135 'base-network' 'behavior':186 'broader':59 'call':4,21,69 'challeng':115 'confirm':116 'connect':176 'content':182 'data':72 'decim':137 'demo':228 'document':166 'enabl':38 'endpoint':7,24,39,98,118,194,198,231 'equal':139 'financ':77 'hardcod':218 'header':112 'howev':165 'id':48,220 'infrastructur':80 'instant':163 'json':102 'json-response' 'key':158 'learn':76 'limit':161 'live':120 'lowpaymentfee' 'lowpaymentfee.com':41 'machin':75 'mani':204 'max':123 'may':225 'mime':104 'network':95 'offer':62 'one':202 'page':167 'paramet':188 'part':56 'pay':2,19,67 'pay-per-cal':1,18,66 'pay-per-call' 'pay-per-request API' 'payment':111,141 'per':3,20,68,86 'placehold':230 'platform':60,154,207 'post':52 'price':83 'prompt':178 'provid':42 'purpos':211 'rate':160 'receipt':6,23,45,215 'request':53,87,187 'requir':108 'respons':103,190 'return':100,173 'schema':191 'second':152 'sent':143 'settl':12,29,89 'span':71 'specif':97,210 'substant':181 'timeout':149 'transact':5,22,44,47,214,219 'transaction receipt API' 'transaction-receipt' 'type':105 'unclear':223 'unit':129 'unknown':196 'usdc':14,31,91,131 'usdc-settlement' 'util':81 'varieti':64 'via':10,27,50 'wallet':177 'web3':78 'x402':11,28,37,110,114 'x402 payment endpoint' 'x402-enabled':36 'x402-payment'","prices":[{"id":"f0ccaea3-f975-4fe7-897b-22bb3f5c8584","listingId":"f104ab2a-2823-4c1c-bd3b-ada843e75076","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/139/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":"2026-04-18T18:58:38.189Z"}],"sources":[{"listingId":"f104ab2a-2823-4c1c-bd3b-ada843e75076","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/139/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:58:38.189Z","lastSeenAt":"2026-04-24T22:32:56.149Z"}],"details":{"listingId":"f104ab2a-2823-4c1c-bd3b-ada843e75076","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/139/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 endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/139/receipt"},{"claim":"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 on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/139/receipt"}],"useCases":["Retrieving a transaction receipt for transaction 139 via a single paid API call","Demonstrating x402 payment protocol integration on Base","Agent-driven pay-per-call access without API key management"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing keyless, pay-per-call API access on Base","Testing USDC micropayment flows"],"notFor":["Production use cases requiring documented request/response schemas","Bulk or high-volume transaction receipt retrieval","Users who need free or subscription-based API access"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:43.526Z"},"updatedAt":"2026-04-24T22:32:56.149Z"}}